2024 |
Rendoth T, Duncan J, Foggett J, Colyvas K, 'Curriculum effectiveness for secondary-aged students with severe intellectual disabilities or profound and multiple learning difficulties in Australia: Teacher perspectives', Journal of Intellectual Disabilities, [C1]
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2024 |
Skinner JA, Leary M, Whatnall M, Collins RA, Pursey KM, Verdejo-Garcia A, et al., 'A three-arm randomised controlled trial of a telehealth intervention targeting improvement in addictive eating for Australian adults (the TRACE program).', Appetite, 195 107211 (2024) [C1]
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Nova |
2024 |
Upton R, Calatayud NE, Clulow S, Brett D, Burton AL, Colyvas K, et al., 'Refrigerated storage and cryopreservation of hormonally induced sperm in the threatened frog, Litoria aurea.', Anim Reprod Sci, 262 107416 (2024) [C1]
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Nova |
2023 |
Skinner JA, Whatnall M, Leary M, Collins RA, Pursey KM, Verdejo-Garcia A, et al., 'Examining the efficacy of a telehealth intervention targeting addictive eating in Australian adults (the TRACE Programme): a randomised controlled trial protocol', BMJ OPEN, 13 (2023)
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2023 |
Colyvas K, Egan G, Craig H, 'Changes in the length of speeches in the plays of William Shakespeare and his contemporaries: A mixed models approach.', PLoS One, 18 e0282716 (2023) [C1]
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Nova |
2023 |
May C, Atherton C, Colyvas K, Mancini V, Campbell LE, 'Development of a Brief Coparenting Measure: The Coparenting Competence Scale', International Journal of Environmental Research and Public Health, 20 6322-6322 [C1]
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Nova |
2023 |
Upton R, Clulow S, Colyvas K, Mahony M, Clulow J, 'Paradigm shift in frog sperm cryopreservation: reduced role for non-penetrating cryoprotectants.', Reproduction, 165 583-592 (2023) [C1]
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Nova |
2022 |
Bradley T, Campbell E, Dray J, Bartlem K, Wye P, Hanly G, et al., 'Systematic review of lifestyle interventions to improve weight, physical activity and diet among people with a mental health condition', SYSTEMATIC REVIEWS, 11 (2022) [C1]
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Nova |
2022 |
Netherton JK, Robinson BR, Ogle RA, Gunn A, Villaverde AISB, Colyvas K, et al., 'Seasonal variation in bull semen quality demonstrates there are heat-sensitive and heat-tolerant bulls', Scientific Reports, 12 (2022) [C1]
Using semen data from 1271 ejaculates (79 different bulls, 11 different breeds) we have investigated the variability of semen quality in cattle living in sub-tropical conditions. ... [more]
Using semen data from 1271 ejaculates (79 different bulls, 11 different breeds) we have investigated the variability of semen quality in cattle living in sub-tropical conditions. Modelling shows definitive evidence of seasonal variation. Semen quality from the same bulls had a 90% ¿pass rate¿ for cryopreservation purposes in winter, dropping to less than 50% in summer. Notably, individual bulls could be classified as either ¿heat-tolerant¿ (produce good quality spermatozoa all year regardless of temperature) or ¿heat-sensitive¿ (only produce good quality sperm in summer). Nominal logistic regression demonstrated when temperatures reach 30.5¿°C, 40% of heat-sensitive bulls fail a semen analysis 17¿days later. At 34¿°C, the proportion of bulls failing reached 63%. Ratifying this, the purposeful heating of bulls to 40¿°C for 12¿h showed that individual animals had different degrees of heat-sensitivity. Using historical temperature data, we then modelled how many days/decade bulls would be subject to heat-events. Beginning from 1939 to 1949, on average, the area in which bulls were kept recorded 19, 7 and 1¿day over 38¿°C, 39¿°C and 40¿°C respectively. This number steadily increases and of last decade (2010¿2010), the numbers of days per decade over 38¿°C, 39¿°C and 40¿°C jumped to a staggering 75, 39 and 15 respectively. These data show the urgent need to identify heat-tolerant bulls as future sires. Such variation likely explains why the veterinary bull breeding test often fails to accurately predict bull breeding potential.
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Nova |
2022 |
Slater K, Colyvas K, Taylor R, Collins CE, Hutchesson M, 'Primary and secondary cardiovascular disease prevention interventions targeting lifestyle risk factors in women: A systematic review and meta-analysis', Frontiers in Cardiovascular Medicine, 9 (2022) [C1]
Background and aims: Over seven million women die from cardiovascular disease (CVD) annually. While lifestyle modification is recommended for CVD prevention, there are no systemat... [more]
Background and aims: Over seven million women die from cardiovascular disease (CVD) annually. While lifestyle modification is recommended for CVD prevention, there are no systematic reviews evaluating the effectiveness of interventions targeted to women. The primary aim of this systematic review is to determine the efficacy of primary and secondary CVD prevention interventions targeting lifestyle risk factors in women. Methods: Six electronic databases were searched up to January 2022. Eligible studies included randomized controlled trials of primary or secondary CVD prevention interventions targeting CVD lifestyle risk factors (diet, physical activity, sedentary behavior, smoking, alcohol, sleep, and weight management) in women (=18 years) that reported CVD risk markers or lifestyle risk factors. Meta-analyses were conducted on CVD risk markers and body mass index (BMI), and the level of evidence was applied to the GRADE (Grading of Recommendations Assessment, Development and Evaluation) criteria and reported. Results: Thirty-five RCTs were included (24 primary and 11 secondary prevention). Meta-analyses demonstrated that lifestyle CVD prevention interventions achieved statistically significant reductions in BMI at = 6 months (0.95 kg/m2, 95% CI = 0.54 to 1.35, p < 0.0001), 12 months (0.61 kg/m2, 95% CI = 0.07 to 1.16, p = 0.03) and >12 months (0.58 kg/m2, 95% CI = 0.01 to 1.16, p = 0.05), and systolic blood pressure (mmHg) at = 6 months (3.51, p < 0.001). Conclusions: Lifestyle interventions are important for the prevention of CVD in women, specifically to reduce systolic blood pressure in the short term (= 6 months) and BMI long term (>12 months). Systematic review registration: https://osf.io/bkwqm, identifier: osf-registrations-bkwqm-v1.
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Nova |
2021 |
Duncan J, Colyvas K, Punch R, 'Social Capital, Loneliness, and Peer Relationships of Adolescents who are Deaf or Hard of Hearing.', Journal of deaf studies and deaf education, 26 223-229 (2021) [C1]
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Nova |
2021 |
Ray K, Dally K, Colyvas K, Lane AE, 'The Effects of a Whole-Class Kindergarten Handwriting Intervention on Early Reading Skills', Reading Research Quarterly, 56 S193-S207 (2021) [C1]
The ultimate goal of reading is to comprehend written text, and this goal can only be attained if the reader can decode written words and understand their meanings. The science of... [more]
The ultimate goal of reading is to comprehend written text, and this goal can only be attained if the reader can decode written words and understand their meanings. The science of reading has provided compelling evidence for the subskills that form the foundation of decoding. Decoding words requires understanding of the alphabetic principle and letter¿sound, or grapheme¿phoneme, correspondence. In the first year of formal schooling (kindergarten), this same understanding is also required for young learners who are learning to write the letters of the alphabet. In this article, we examine the effectiveness of a handwriting intervention, Write Start¿K, that emphasizes the recall, retrieval, reproduction, and repetition (the 4Rs model) of grapheme¿phoneme relations. We conducted a two-group, pre/posttest study at two Australian schools across four kindergarten classes (n = 77 students). One school received the intervention, and the other continued with standard teaching. Participants (mean age¿= 5 years 8.45 months, standard deviation = 4.18 months) at both schools were assessed at baseline, immediately after the eight-week intervention period, and at 12 weeks following the end of the intervention (follow-up). We used linear mixed models to determine the statistical significance of effects over three time intervals. We identified statistically significant Group × Time effects for letter name knowledge and word reading, whereas changes in letter sound knowledge and nonsense word¿reading fluency approached statistical significance. These results indicate that a handwriting intervention, incorporating repeated practice in recalling and reproducing letter forms, had a statistically significant impact on early reading skills.
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Nova |
2021 |
Metse AP, Clinton-Mcharg T, Skinner E, Yogaraj Y, Colyvas K, Bowman J, 'Associations between suboptimal sleep and smoking, poor nutrition, harmful alcohol consumption and inadequate physical activity ( snap risks ): A comparison of people with and without a mental health condition in an australian community survey', International Journal of Environmental Research and Public Health, 18 (2021) [C1]
Introduction: People with a mental health condition experience disproportionate morbidity and mortality compared to the general population. This inequity has been largely attribut... [more]
Introduction: People with a mental health condition experience disproportionate morbidity and mortality compared to the general population. This inequity has been largely attributed to a higher prevalence of chronic disease risk behaviours including smoking, poor nutrition, harmful alcohol consumption and inadequate physical activity (¿SNAP risks¿). Suboptimal sleep is highly prevalent among people with a mental health condition and, as an identified risk behaviour for several chronic diseases, has been implicated as an additional contributor to this health inequity. Research involving people without a mental health condition suggests associations between poor sleep and each SNAP risk; however, interactions with mental health status have not been reported in an Australian population. This study explored associations between suboptimal sleep and all four SNAP risks, and assessed whether they vary by mental health status. Materials and Methods: A descriptive study (n = 1265) was undertaken using self-report data from a cross-sectional telephone survey of Australian adults. Based on national guidelines and recommendations that indicate when someone might be at risk of adverse health effects, SNAP risks and sleep variables were reduced to two levels: ¿at risk¿ or ¿not at risk¿; and ¿appropriate¿ or ¿suboptimal¿, respectively. Chi square tests and multivariable logistic regression models explored associations between suboptimal sleep, SNAP risks and mental health status. Results: Fifteen per cent (n = 184) of participants identified as having a mental health condition in the past 12 months. Being at risk of adverse health effects due to smoking had the strongest association with several measures of suboptimal sleep (ps < 0.05). Two-way interactions revealed that being at risk of adverse health effects due to alcohol use and physical inactivity resulted in a significantly greater likelihood of suboptimal sleep duration (OR 3.06, 95% CI 1.41 to 6.64; OR 3.06, 95% CI 1.41 to 6.69) and nap duration (OR 7.96, 95% CI 1.90 to 33.22), respectively, for people with a mental health condition compared to those without. Conclusions: The findings suggest associations between suboptimal sleep and smoking, risky alcohol consumption and physical inactivity, with the latter two perhaps being stronger among people with a mental health condition compared to those without such a condition. Poor sleep should be considered in interventions to address smoking, alcohol and physical activity; and vice versa. This study lends further support for the value of multirisk lifestyle interventions to promote physical and mental health for people with mental health conditions.
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Nova |
2021 |
Hoffman L, Wilson L, Hewat S, Colyvas K, 'The effect of speech sample duration on the reliability of measurement of severity of stuttering', Speech, Language and Hearing, 24 1-8 (2021) [C1]
Purpose: Speech-language pathologists¿ (SLPs) ability to measure stuttering reliably has been of interest over time. However, speech samples used in stuttering measurement researc... [more]
Purpose: Speech-language pathologists¿ (SLPs) ability to measure stuttering reliably has been of interest over time. However, speech samples used in stuttering measurement research have varied in duration. This study was undertaken to examine whether the duration of speech samples influences the reliability of measurement of severity of stuttering by SLPs. Methods: Ten specialist SLPs rated 27 audio, English speech samples of three different durations (9 × 1-minute, 9 × 3-minutes, 9 × 5-minutes) of adults who stutter, using a 9-point severity rating (SR) scale. Results: The speech sample durations produced similar results when using the SR scale to measure severity of stuttering. Thus, samples of 1, 3 and 5-minute durations were found to be equally appropriate for reliability research and training purposes. Variability was found to be larger in the moderate severity range than the mild and severe ranges. Conclusions: Data trends suggest that SLPs and researchers should focus more attention on practice and training in the middle ranges of the SR scale, due to increased variability in this range.
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Nova |
2021 |
Bradley T, Bartlem K, Colyvas K, Wye P, Campbell E, Reid K, Bowman J, 'Examining service participation and outcomes from a population-level telephone-coaching service supporting changes to healthy eating, physical activity and weight: A comparison of participants with and without a mental health condition', Preventive Medicine Reports, 24 (2021) [C1]
Population-level telephone coaching services provide accessible behaviour change support for modifiable health risk behaviours. The NSW Get Healthy Information and Coaching Servic... [more]
Population-level telephone coaching services provide accessible behaviour change support for modifiable health risk behaviours. The NSW Get Healthy Information and Coaching Service® (GHS) is a free telephone-based coaching service in Australia, supporting improvements in healthy eating, physical activity and achieving or maintaining a healthy weight. This study compared measures of participation (such as program completion) and outcomes achieved immediate post-program (including changes in fruit and vegetable consumption, physical activity and weight) for GHS participants with and without a self-identified mental health condition (MHC). Secondary data analysis was conducted on service data collected at program intake and completion for individuals who enrolled in a coaching program between January 2018 and October 2019 (n = 5,629); 33% identified as having had an MHC. While those with and without an MHC had similar rates of completion, those with an MHC were less likely to complete a coaching program (31% vs 36%, p = .003). Participants with an MHC made significant positive changes to their fruit and vegetable consumption, physical activity (walking and moderate), weight and BMI, but not to waist circumference or vigorous physical activity. When comparing the magnitude of change for those with and without an MHC, individuals without made greater improvements to their weight (adjusted mean difference -0.623 kg, p = .034) and daily vegetable intake (adjusted mean difference -0.199 serves; p = .01). There were no differences for other variables. The GHS is an effective means of supporting behaviour change for people with an MHC who complete a coaching program. Further research should consider means of improving retention rates.
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Nova |
2021 |
Chiam SL, Higgins D, Colyvas K, Page M, Taylor J, 'Interpretation, confidence and application of the standardised terms: Identified, Probable, Possible, Exclude and Insufficient in forensic odontology identification', Science and Justice, 61 426-434 (2021) [C1]
Forensic odontology identification scales are used to express certainty of identifications of deceased persons. These standardized scales are assumed to convey unambiguous expert ... [more]
Forensic odontology identification scales are used to express certainty of identifications of deceased persons. These standardized scales are assumed to convey unambiguous expert opinions and facilitate communication between forensic odontologists and end users. However, to date no studies have investigated how the experts interpret and use these scales. Forensic odontology identification scales are used to express certainty of identifications of deceased persons. These standardized scales are assumed to convey unambiguous expert opinions and facilitate communication between forensic odontologists and end users. However, to date no studies have investigated how the experts interpret and use these scales. This paper aims to examine the interpretation of the DVISYS forensic identification scale and choices of the levels in the scale subsequent to, and derived from, comparison of pairs of dental radiographs by extending the analysis of the data collected in the study by Page and Lain et. al. 2017. The studied variables: self-reported confidence, forced binary decision of match and non-match, choice of level in the DVISYS scale (Identified, Probable, Possible, Insufficient and Exclude) were further analysed in this study using mixed models for relationships between the choices of level in the identification scale and the fundamental beliefs of likelihood of identification. The results of this further analysis showed that the reported confidence of the decisions was correlated to the difficulty of cases, and as confidence decreased the use of less definitive terms (¿Probable¿, ¿Possible¿ and ¿Insufficient¿) increased. ¿Probable¿ and ¿Possible¿ were used mainly in underlying beliefs below that of ¿Identified¿ whereas ¿Insufficient¿ was used mainly to convey a sublevel of ¿Exclude¿. The use of ¿Insufficient¿ in this study was not consistent with the prescribed definition of the term. The participants of the original study were not aware of the difficulty grading of the cases nor were required to grade them, however the reported confidence was systematically correlated to difficulty. Furthermore, indicated confidence level was correlated with choice of level on the scale in general, but the interpretation of the definition and application of the terms varied. The findings reported here contribute to the foundational knowledge of factors governing the interpretation and application of the DVISYS forensic odontology identification scale and suggest that this scale may need to be modified.
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Nova |
2021 |
Upton R, Clulow S, Calatayud NE, Colyvas K, Seeto RGY, Wong LAM, et al., 'Generation of reproductively mature offspring from the endangered green and golden bell frog Litoria aurea using cryopreserved spermatozoa', Reproduction, Fertility and Development, 33 562-572 (2021) [C1]
Amphibians are becoming increasingly reliant on captive breeding programs for continued survival. Assisted reproductive technologies including gamete cryopreservation and IVF can ... [more]
Amphibians are becoming increasingly reliant on captive breeding programs for continued survival. Assisted reproductive technologies including gamete cryopreservation and IVF can help reduce costs of breeding programs, provide insurance against extinction and assist genetic rescue in wild populations. However, the use of these technologies to produce reproductively mature offspring has only been demonstrated in a few non-model species. We aimed to optimise sperm cryopreservation in the threatened frog Litoria aurea and generate mature offspring from frozen-thawed spermatozoa by IVF. We tested three concentrations (1.4, 2.1 and 2.8 M) of the cryoprotectants dimethylsulfoxide (DMSO) and glycerol with 0.3 M sucrose. Using DMSO was more likely to result in recovery of sperm motility, vitality and acrosome integrity than glycerol, regardless of concentration, with forward progressive motility being most sensitive to damage. The lowest concentrations of 1.4 and 2.1 M provided the best protection regardless of cryoprotectant type. Spermatozoa cryopreserved in 2.1 M DMSO outperformed spermatozoa cryopreserved in equivalent concentrations of glycerol in terms of their ability to fertilise ova, resulting in higher rates of embryos hatching and several individuals reaching sexual maturity. We have demonstrated that sperm cryopreservation and subsequent offspring generation via IVF is a feasible conservation tool for L. aurea and other threatened amphibians.
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Nova |
2021 |
Wijesekara H, Colyvas K, Rippon P, Hoang SA, Bolan NS, Manna MC, et al., 'Carbon sequestration value of biosolids applied to soil: A global meta-analysis', JOURNAL OF ENVIRONMENTAL MANAGEMENT, 284 (2021) [C1]
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Nova |
2020 |
Magee AD, Lorrey AM, Kiem AS, Colyvas K, 'A new island-scale tropical cyclone outlook for southwest Pacific nations and territories', Scientific Reports, 10 (2020) [C1]
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Nova |
2020 |
Fehily CMC, Bartlem KM, Wiggers JH, Wye PM, Clancy RV, Castle DJ, et al., 'Effectiveness of embedding a specialist preventive care clinician in a community mental health service in increasing preventive care provision: A randomised controlled trial', Australian and New Zealand Journal of Psychiatry, 54 620-632 (2020) [C1]
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Nova |
2020 |
Spencer E, Bryant L, Colyvas K, 'Minimizing Variability in Language Sampling Analysis A Practical Way to Calculate Text Length and Time Variability and Measure Reliable Change When Assessing Clients', Topics in Language Disorders, 40 166-181 (2020) [C1]
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Nova |
2020 |
Fehily C, Ling R, Searles A, Bartlem K, Wiggers J, Hodder R, et al., 'An economic evaluation of a specialist preventive care clinician in a community mental health service: A randomised controlled trial', BMC Health Services Research, 20 (2020) [C1]
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Nova |
2020 |
Burstal J, Clulow S, Colyvas K, Kark S, Griffin AS, 'Radiotracking invasive spread: Are common mynas more active and exploratory on the invasion front?', Biological Invasions, 22 2525-2543 (2020) [C1]
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Nova |
2019 |
Bartlem K, Wolfenden L, Colyvas K, Campbell L, Freund M, Doherty E, et al., 'The association between the receipt of primary care clinician provision of preventive care and short term health behaviour change.', Preventive Medicine, 123 308-315 (2019) [C1]
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Nova |
2018 |
Arthur-Kelly M, Foreman P, Maes B, Colyvas K, Lyons G, 'Observational Data on Socio-Communicative Phenomena in Classrooms Supporting Students with Profound Intellectual and Multiple Disability (PIMD): Advancing Theory Development on Learning and Engagement Through Data Analysis', Advances in Neurodevelopmental Disorders, 2 25-37 (2018) [C1]
Theories of learning and engagement in persons with profound intellectual and multiple disability (PIMD) are essential as a basis for empirical investigations into the effectivene... [more]
Theories of learning and engagement in persons with profound intellectual and multiple disability (PIMD) are essential as a basis for empirical investigations into the effectiveness or otherwise of educational and other interventions. In this paper, a selected descriptive analysis of observational data on the social and communicative experiences of a sample of eight school students aged between 5 and 13 with profound intellectual and multiple disability is reported. The observed frequency of various socio-communicative phenomena as well as potential relationships amongst social groupings and communication indicators in two types of school settings are outlined. These results inform a concluding discussion of theoretical perspectives on the nature of inputs to, and responses indicative of learning in this population of individuals with high and complex support needs.
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Nova |
2018 |
Hodder RK, Homer S, Freund M, Bowman JA, Lecathelinais C, Coly-Vas K, et al., 'The association between adolescent condom use and individual and environmental resilience protective factors', Australian and New Zealand Journal of Public Health, 42 230-233 (2018) [C1]
Objective: Individual and environmental resilience protective factors are suggested to be associated with adolescent condom use; however, previous studies have not comprehensively... [more]
Objective: Individual and environmental resilience protective factors are suggested to be associated with adolescent condom use; however, previous studies have not comprehensively examined such associations. This study aimed to determine the associations between condom use, and numerous individual and environmental resilience protective factors in sexually active Australian adolescents. Methods: Participants were Grade 10 students attending 28 Australian government high schools (n=1,688). An online survey (2011) collected data regarding: sexual intercourse (past year), condom use and 14 individual and environmental resilience protective factors. Multivariable backward stepwise logistic regression models examined associations between student condom use and protective factors (total, subscale). Results: Only total environmental protective factors remained in the final total score model; students with higher total environmental protective factors scores were 2.59 times more likely to always use a condom(95%CI:1.80-3.74). Only three of 14 protective factor subscales were associated with a higher likelihood of always using a condom in the final subscale model (individual: goals/aspirations; environmental: community participation, pro-social peers). Conclusions: Total environmental and three protective factor subscales demonstrated prominent associations with consistent use of condoms in sexually active adolescents. Implications for public health: Consideration of particular resilience protective factors in adolescent sexual risk behaviour prevention, such as condom use, is warranted.
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Nova |
2018 |
Cantle Moore R, Colyvas K, 'The Infant Monitor of vocal Production (IMP) normative study: important foundations', Deafness and Education International, 20 228-244 (2018) [C1]
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Nova |
2018 |
Miri N, Legge K, Colyvas K, Lehmann J, Vial P, Moore A, et al., 'A remote EPID-based dosimetric TPS-planned audit of centers for clinical trials: outcomes and analysis of contributing factors', RADIATION ONCOLOGY, 13 (2018) [C1]
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Nova |
2017 |
Zhang H-M, Colyvas K, Patrick JW, Offler CE, 'A Ca2+-dependent remodelled actin network directs vesicle trafficking to build wall ingrowth papillae in transfer cells', JOURNAL OF EXPERIMENTAL BOTANY, 68 4749-4764 (2017) [C1]
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Nova |
2017 |
Hulteen RM, Smith JJ, Morgan PJ, Barnett LM, Hallal PC, Colyvas K, Lubans DR, 'Global participation in sport and leisure-time physical activities: A systematic review and meta-analysis', Preventive Medicine, 95 14-25 (2017) [C1]
This review aimed to determine the most popular physical activities performed by children, adolescents, and adults globally. Statistic bureau websites and article databases Scopus... [more]
This review aimed to determine the most popular physical activities performed by children, adolescents, and adults globally. Statistic bureau websites and article databases Scopus, ProQuest, SPORTDiscus, and Science Direct were searched between November 17th, 2014 and April 31st, 2015. Eligible studies were published in the last 10¿years with participation rates for specific physical activities among individuals five years or older. Data extraction for included articles (n¿=¿64) was assessed independently and agreed upon by two authors. A random-effects model was used to calculate participation rates in specific activities for each age group and region. In total 73,304 articles were retrieved and 64 articles representing 47 countries were included in the final meta-analysis. Among adults, walking was the most popular activity in the Americas (18.9%; 95% CI 10.2 to 32.5), Eastern Mediterranean (15.0%; 95% CI 5.8 to 33.6), Southeast Asia (39.3%; 95% CI 0.9 to 98.0) and Western Pacific (41.8%; 95% CI 25.2 to 60.6). In Europe and Africa, soccer (10.0%; 95% CI 6.5 to 15.1) and running (9.3%; 95% CI 0.9 to 53.9), respectively, were top activities. Child and adolescent participation results were highly dependent upon region. American youth team sport participation was high, while youth from the Eastern Mediterranean and Western Pacific were more likely to report participation in lifelong physical activities. Global data for adults reflects a consistent pattern of participation in running and walking. Among all age groups and regions soccer was popular. In children and adolescents, preferences were variable between regions.
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Nova |
2017 |
Stuart A, Baker AL, Bowman J, McCarter K, Denham AMJ, Lee N, et al., 'Protocol for a systematic review of psychological treatment for methamphetamine use: an analysis of methamphetamine use and mental health symptom outcomes', BMJ OPEN, 7 (2017)
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2017 |
Zhang H-M, Wheeler SL, Xia X, Colyvas K, Offler CE, Patrick JW, 'Transcript Profiling Identifies Gene Cohorts Controlled by Each Signal Regulating Trans-Differentiation of Epidermal Cells of Vicia faba Cotyledons to a Transfer Cell Phenotype', FRONTIERS IN PLANT SCIENCE, 8 (2017) [C1]
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Nova |
2017 |
Metse AP, Wiggers J, Wye P, Wolfenden L, Freund M, Clancy R, et al., 'Efficacy of a universal smoking cessation intervention initiated in inpatient psychiatry and continued post-discharge: A randomised controlled trial', Australian and New Zealand Journal of Psychiatry, 51 366-381 (2017) [C1]
Objective: Interventions are required to redress the disproportionate tobacco-related health burden experienced by persons with a mental illness. This study aimed to assess the ef... [more]
Objective: Interventions are required to redress the disproportionate tobacco-related health burden experienced by persons with a mental illness. This study aimed to assess the efficacy of a universal smoking cessation intervention initiated within an acute psychiatric inpatient setting and continued post-discharge in reducing smoking prevalence and increasing quitting behaviours. Method: A randomised controlled trial was undertaken across four psychiatric inpatient facilities in Australia. Participants (N = 754) were randomised to receive either usual care (n = 375) or an intervention comprising a brief motivational interview and self-help material while in hospital, followed by a 4-month pharmacological and psychosocial intervention (n = 379) upon discharge. Primary outcomes assessed at 6 and 12 months post-discharge were 7-day point prevalence and 1-month prolonged smoking abstinence. A number of secondary smoking-related outcomes were also assessed. Subgroup analyses were conducted based on psychiatric diagnosis, baseline readiness to quit and nicotine dependence. Results: Seven-day point prevalence abstinence was higher for intervention participants (15.8%) than controls (9.3%) at 6 months post-discharge (odds ratio = 1.07, p = 0.04), but not at 12 months (13.4% and 10.0%, respectively; odds ratio = 1.03, p = 0.25). Significant intervention effects were not found on measures of prolonged abstinence at either 6 or 12 months post-discharge. Differential intervention effects for the primary outcomes were not detected for any subgroups. At both 6 and 12 months post-discharge, intervention group participants were significantly more likely to smoke fewer cigarettes per day, have reduced cigarette consumption by 3/450% and to have made at least one quit attempt, relative to controls. Conclusions: Universal smoking cessation treatment initiated in inpatient psychiatry and continued post-discharge was efficacious in increasing 7-day point prevalence smoking cessation rates and related quitting behaviours at 6 months post-discharge, with sustained effects on quitting behaviour at 12 months. Further research is required to identify strategies for achieving longer term smoking cessation.
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Nova |
2017 |
Yang WY, Burrows T, MacDonald-Wicks L, Williams LT, Collins CE, Chee WSS, Colyvas K, 'Body Weight Status and Dietary Intakes of Urban Malay Primary School Children: Evidence from the Family Diet Study', CHILDREN-BASEL, 4 (2017) [C1]
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Nova |
2016 |
Dempsey I, Valentine M, Colyvas K, 'The Effects of Special Education Support on Young Australian School Students', INTERNATIONAL JOURNAL OF DISABILITY DEVELOPMENT AND EDUCATION, 63 271-292 (2016) [C1]
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Nova |
2015 |
Stockings EAL, Bowman JA, Bartlem KM, Mcelwaine KM, Baker AL, Terry M, et al., 'Implementation of a smoke-free policy in an inpatient psychiatric facility: Patient-reported adherence, support, and receipt of nicotine-dependence treatment', International Journal of Mental Health Nursing, 24 342-349 (2015) [C1]
The implementation of smoke-free policies in inpatient psychiatric facilities, including patient adherence, mental health nursing staff support, and provision of nicotine-dependen... [more]
The implementation of smoke-free policies in inpatient psychiatric facilities, including patient adherence, mental health nursing staff support, and provision of nicotine-dependence treatment to patients, has been reported to be poor. The extent to which the quality of smoke-free policy implementation is associated with patient views of a policy is unknown. We conducted a cross-sectional survey of 181 patients (53.6%, n = 97 smokers; and 46.4%, n = 84 non-smokers) in an Australian inpatient psychiatric facility with a total smoke-free policy. Smokers' adherence to the policy was poor (83.5% smoked). Only half (53.6%) perceived staff to be supportive of the policy. Most smokers used nicotine-replacement therapy (75.3%); although few received optimal nicotine-dependence treatment (19.6%). Overall, 45.9% of patients viewed the smoke-free policy in the unit as positive (29.9% smokers; 64.3% non-smokers). For smokers, adhering to the ban, perceiving staff to be supportive, and reporting that the nicotine-replacement therapy reduced cravings to smoke were associated with a more positive view towards the smoke-free policy. These findings support the importance of patient adherence, mental health nursing staff support, and adequate provision of nicotine-dependence treatment in strengthening smoke-free policy implementation in inpatient psychiatric settings.
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Nova |
2015 |
Moffiet T, Alterman D, Hands S, Colyvas K, Page A, Moghtaderi B, 'A statistical study on the combined effects of wall thermal mass and thermal resistance on internal air temperatures', Journal of Building Physics, 38 419-443 (2015) [C1]
Statistical analyses are important for real-world validation of theoretical model predictions. In this article, a statistical analysis of real data shows empirically how thermal r... [more]
Statistical analyses are important for real-world validation of theoretical model predictions. In this article, a statistical analysis of real data shows empirically how thermal resistance, thermal mass, building design, season and external air temperature collectively affect indoor air temperature. A simple, four-point, diurnal, temperature-by-time profile is used to summarise daily thermal performance and is used as the response variable for the analysis of performance. The findings from the statistical analysis imply that, at least for moderate climates, the best performing construction/design will be one in which insulation and thermal mass arrangements can be dynamically altered to suit weather and season.
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Nova |
2015 |
Unicomb R, Colyvas K, Harrison E, Hewat S, 'Assessment of reliable change using 95% credible intervals for the differences in proportions: A statistical analysis for case-study methodology', Journal of Speech, Language, and Hearing Research, 58 728-739 (2015) [C1]
Purpose: Case-study methodology studying change is often used in the field of speech-language pathology, but it can be criticized for not being statistically robust. Yet with the ... [more]
Purpose: Case-study methodology studying change is often used in the field of speech-language pathology, but it can be criticized for not being statistically robust. Yet with the heterogeneous nature of many communication disorders, case studies allow clinicians and researchers to closely observe and report on change. Such information is valuable and can further inform large-scale experimental designs. In this research note, a statistical analysis for case-study data is outlined that employs a modification to the Reliable Change Index (Jacobson & Truax, 1991). The relationship between reliable change and clinical significance is discussed. Example data are used to guide the reader through the use and application of this analysis. Method: A method of analysis is detailed that is suitable for assessing change in measures with binary categorical outcomes. The analysis is illustrated using data from one individual, measured before and after treatment for stuttering. Conclusions: The application of this approach to assess change in categorical, binary data has potential application in speech-language pathology. It enables clinicians and researchers to analyze results from case studies for their statistical and clinical significance. This new method addresses a gap in the research design literature, that is, the lack of analysis methods for noncontinuous data (such as counts, rates, proportions of events) that may be used in case-study designs.
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Nova |
2015 |
Doody JS, James H, Colyvas K, Mchenry CR, Clulow S, 'Deep nesting in a lizard, déjà vu devil's corkscrews: First helical reptile burrow and deepest vertebrate nest', Biological Journal of the Linnean Society, (2015) [C1]
Dating back to 255 Mya, a diversity of vertebrate species have excavated mysterious, deep helical burrows called Daimonelix (devil's corkscrews). The possible functions of su... [more]
Dating back to 255 Mya, a diversity of vertebrate species have excavated mysterious, deep helical burrows called Daimonelix (devil's corkscrews). The possible functions of such structures are manifold, but their paucity in extant animals has frustrated their adaptive explanation. We recently discovered the first helical reptile burrows, created by the monitor lizard Varanus panoptes. The plugged burrows terminated in nest chambers that were the deepest known of any vertebrate, and by far the deepest of any reptile (mean = 2.3 m, range = 1.0-3.6 m, N = 52). A significant positive relationship between soil moisture and nest depth persisted at depths > 1 m, suggesting that deep nesting in V. panoptes may be an evolutionary response to egg desiccation during the long (approximately 8 months) dry season incubation period. Alternatively, lizards may avoid shallower nesting because even slight daily temperature fluctuations are detrimental to developing embryos; our data show that this species may have the most stable incubation environment of any reptile and possibly any ectotherm. Soil-filled burrows do not support the hypothesis generated for Daimonelix that the helix would provide more consistent temperature and humidity as a result of limited air circulation in dry palaeoclimates. We suggest that Daimonelix were used mainly for nesting or rearing young, because helical burrows of extant vertebrates are generally associated with a nest. The extraordinary nesting in this lizard reflects a system in which adaptive hypotheses for the function of fossil helical burrows can be readily tested.
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Nova |
2015 |
Masoe AV, Blinkhorn AS, Colyvas K, Taylor J, Blinkhorn FA, 'Reliability study of clinical electronic records with paper records in the NSW Public Oral Health Service.', Public health research & practice, 25 e2521519 (2015) [C1]
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Nova |
2015 |
Spencer E, Ferguson A, Craig H, Colyvas K, Hankey GJ, Flicker L, 'Propositional idea density in older men's written language: Findings from the HIMS study using computerised analysis', Clinical Linguistics and Phonetics, 29 85-101 (2015) [C1]
Decline in linguistic function has been associated with decline in cognitive function in previous research. This research investigated the informativeness of written language samp... [more]
Decline in linguistic function has been associated with decline in cognitive function in previous research. This research investigated the informativeness of written language samples of Australian men from the Health in Men's Study (HIMS) aged from 76 to 93 years using the Computerised Propositional Idea Density Rater (CPIDR 5.1). In total, 60 255 words in 1147 comments were analysed using a linear-mixed model for statistical analysis. Results indicated no relationship with education level (p = 0.79). Participants for whom English was not their first learnt language showed Propositional Idea Density (PD) scores slightly lower (0.018 per 1 word). Mean PD per 1 word for those for whom English was their first language for comments below 60 words was 0.494 and above 60 words 0.526. Text length was found to have an effect (p = <0.0001). The mean PD was higher than previously reported for men and lower than previously reported for a similar cohort for Australian women.
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Nova |
2014 |
Manning J, Dwyer P, Rosamilia A, Colyvas K, Murray C, Fitzgerald E, 'A multicentre, prospective, randomised, double-blind study to measure the treatment effectiveness of abobotulinum A (AboBTXA) among women with refractory interstitial cystitis/bladder pain syndrome', INTERNATIONAL UROGYNECOLOGY JOURNAL, 25 593-599 (2014)
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2014 |
Ferguson A, Spencer E, Craig H, Colyvas K, 'Propositional Idea Density in women's written language over the lifespan: Computerized analysis', Cortex, 55 107-121 (2014) [C1]
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Nova |
2014 |
Foreman P, Arthur-Kelly M, Bennett D, Neilands J, Colyvas K, 'Observed changes in the alertness and communicative involvement of students with multiple and severe disability following in-class mentor modelling for staff in segregated and general education classrooms', JOURNAL OF INTELLECTUAL DISABILITY RESEARCH, 58 704-720 (2014) [C1]
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Nova |
2014 |
Stockings EAL, Bowman JA, Baker AL, Terry M, Clancy R, Wye PM, et al., 'Impact of a postdischarge smoking cessation intervention for smokers admitted to an inpatient psychiatric facility: A randomized controlled trial', Nicotine and Tobacco Research, 16 1417-1428 (2014) [C1]
Introduction: Persons with a mental disorder smoke at higher rates and suffer disproportionate tobacco-related burden compared with the general population. The aim of this study w... [more]
Introduction: Persons with a mental disorder smoke at higher rates and suffer disproportionate tobacco-related burden compared with the general population. The aim of this study was to determine if a smoking cessation intervention initiated during a psychiatric hospitalization and continued postdischarge was effective in reducing smoking behaviors among persons with a mental disorder. Methods: A randomized controlled trial was conducted at an Australian inpatient psychiatric facility. Participants were 205 patient smokers allocated to a treatment as usual control (n = 101) or a smoking cessation intervention (n = 104) incorporating psychosocial and pharmacological support for 4 months postdischarge. Follow-up assessments were conducted at 1 week, 2, 4, and 6 months postdischarge and included abstinence from cigarettes, quit attempts, daily cigarette consumption, and nicotine dependence. Results: Rates of continuous and 7-day point prevalence abstinence did not differ between treatment conditions at the 6-month follow-up; however, point prevalence abstinence was significantly higher for intervention (11.5%) compared with control (2%) participants at 4 months (OR = 6.46, p = .01). Participants in the intervention condition reported significantly more quit attempts (F[1, 202.5] = 15.23, p = .0001), lower daily cigarette consumption (F[4, 586] = 6.5, p < .001), and lower levels of nicotine dependence (F[3, 406] = 8.5, p < .0001) compared with controls at all follow-up assessments. Conclusions: Postdischarge cessation support was effective in encouraging quit attempts and reducing cigarette consumption up to 6 months postdischarge. Additional support strategies are required to facilitate longer-term cessation benefits for smokers with a mental disorder.
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Nova |
2014 |
Patrick JW, Colyvas K, 'Crop yield components - photoassimilate supply- or utilisation limited-organ development?', FUNCTIONAL PLANT BIOLOGY, 41 893-913 (2014) [C1]
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Nova |
2014 |
Cassey J, Salter J, Colyvas K, Burstal R, Stanger R, 'The effect of convective heating on evaporative heat loss in anesthetized children', Paediatric Anaesthesia, 24 1274-1280 (2014) [C1]
Background: Convective warming is effective in maintaining core temperature under anesthesia. It may increase evaporative water loss (EWL). If significant, further investigation o... [more]
Background: Convective warming is effective in maintaining core temperature under anesthesia. It may increase evaporative water loss (EWL). If significant, further investigation of warming modifications to minimize this impact would be warranted. Objectives: To quantify EWL in two groups of children (warmed and nonwarmed) having surgical procedures under anesthesia. Methods: We performed an observational study of well children having general anesthesia for elective surgical procedures lasting =60 min. They were recruited sequentially to each of three age groups: 1-12 months, 13 months - 5 years, and 5-12 years - with each age group divided into convectively warmed (43°C) and nonwarmed (21°C) subgroups. Evaporative heat loss (EHL) was calculated from accurate measurement of net EWL during the surgical period. Results: Sixty children were studied. As a percentage of body mass, mean EWLs were 0.29 (warmed) and 0.09 (nonwarmed). Using an ANCOVA model, only procedure duration had a significant impact and explained why the extended procedural time in some convectively warmed children led to higher mean EWLs for that group. For the nonwarmed group, the mean Tcore drop was 1.27°C with a contribution from EWL of 0.6°C over ~70 min. Conclusions: Within the age range 1 month-12 years, EHL is not significantly influenced by convective heating under anesthesia. There is no thermal advantage in exploring technique modifications such as humidifying the warming air. Previous estimates of the contribution of EHL to total heat loss in anesthetized children may require revision.
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Nova |
2013 |
Bryant L, Spencer E, Ferguson A, Craig H, Colyvas K, Worrall L, 'Propositional Idea Density in aphasic discourse', Aphasiology, 27 992-1009 (2013) [C1]
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Nova |
2013 |
Cassey J, Armstrong P, Colyvas K, Stanger R, 'Comment on 'Prevention of intraoperative hypothermia...' Witt L, Denhardt N, Eich C et al.', PEDIATRIC ANESTHESIA, 23 970-970 (2013) [C3]
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Nova |
2012 |
Spencer EL, Craig DH, Ferguson AJ, Colyvas KJ, 'Language and ageing - Exploring propositional density in written language - Stability over time', Clinical Linguistics & Phonetics, 26 743-754 (2012) [C1]
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Nova |
2012 |
Morrison MK, Koh D, Lowe J, Miller YD, Marshall AL, Colyvas KJ, Collins CE, 'Postpartum diet quality in Australian women following a gestational diabetes pregnancy', European Journal of Clinical Nutrition, 66 1160-1165 (2012) [C1]
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Nova |
2012 |
Bowman JA, Wiggers JH, Colyvas KJ, Wye PM, Walsh RA, Bartlem KM, 'Smoking cessation among Australian methadone clients: Prevalence, characteristics and a need for action', Drug and Alcohol Review, 31 507-513 (2012) [C1]
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Nova |
2011 |
Collins CE, Okely AD, Morgan PJ, Jones RA, Burrows TL, Cliff DP, et al., 'Parent diet modification, child activity, or both in obese children: An RCT', Pediatrics, 127 619-627 (2011) [C1]
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Nova |
2011 |
Cliff DP, Okely AD, Morgan PJ, Steele JR, Jones RA, Colyvas KJ, Baur LA, 'Movement skills and physical activity in obese children: Randomized controlled trial', Medicine & Science in Sports & Exercise, 43 90-100 (2011) [C1]
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Nova |
2010 |
Al-Dala'In TA, Luo S, Summons PF, Colyvas KJ, 'Evaluating the utilisation of mobile devices in online payments from the consumer perspective', Journal of Convergence Information Technology, 5 7-16 (2010) [C1]
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Nova |
2010 |
Turner A, Phillips L, Hambridge JA, Baker AL, Bowman JA, Colyvas KJ, 'Clinical outcomes associated with depression, anxiety and social support among cardiac rehabilitation attendees', Australian and New Zealand Journal of Psychiatry, 44 658-666 (2010) [C1]
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Nova |
2010 |
Okely AD, Collins CE, Morgan PJ, Jones RA, Warren JM, Cliff DP, et al., 'Multi-site randomized controlled trial of a child-centered physical activity program, a parent-centered dietary-modification program, or both in overweight children: The HIKCUPS study', Journal of Pediatrics, 157 388-394 (2010) [C1]
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Nova |
2010 |
Okely AD, Collins CE, Morgan PJ, Jones RA, Warren JM, Cliff DP, et al., 'Multi-site randomized controlled trial of a child-centered physical activity program, a parent-centered dietary-modification program, or both in overweight children: The HIKCUPS study', Journal of Pediatrics, 157 (2010)
Objective: To evaluate whether a child-centered physical activity program, combined with a parent-centered dietary program, was more efficacious than each treatment alone, in prev... [more]
Objective: To evaluate whether a child-centered physical activity program, combined with a parent-centered dietary program, was more efficacious than each treatment alone, in preventing unhealthy weight-gain in overweight children. Study design: An assessor-blinded randomized controlled trial involving 165 overweight/obese 5.5- to 9.9- year-old children. Participants were randomly assigned to 1 of 3 interventions: a parent-centered dietary program (Diet); a child-centered physical activity program (Activity); or a combination of both (Diet + Activity). All groups received 10 weekly face-to-face sessions followed by 3 monthly relapse-prevention phone calls. Analysis was by intention-to-treat. The primary outcome was change in body mass index z-score at 6 and 12 months (n = 114 and 106, respectively). Results: Body mass index z-scores were reduced at 12-months in all groups, with the Diet (mean [95% confidence interval]) (-0.39 [-0.51 to 0.27]) and Diet + Activity (-0.32, [-0.36, -0.23]) groups showing a greater reduction than the Activity group (-0.17 [-0.28, -0.06]) (P = .02). Changes in other outcomes (waist circumference and metabolic profile) were not statistically significant among groups. Conclusion: Relative body weight decreased at 6 months and was sustained at 12 months through treatment with a child-centered physical activity program, a parent-centered dietary program, or both. The greatest effect was achieved when a parent-centered dietary component was included. © 2010 Mosby Inc. All rights reserved.
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2009 |
Burrows TL, Warren JM, Colyvas KJ, Garg ML, Collins CE, 'Validation of overweight children's fruit and vegetable intake using plasma carotenoids', Obesity, 17 162-168 (2009) [C1]
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Nova |
2009 |
Stanger RJ, Colyvas KJ, Cassey JG, Robinson IA, Armstrong P, 'Predicting the efficacy of convection warming in anaesthetized children', British Journal of Anaesthesia, 103 275-282 (2009) [C1]
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Nova |
2009 |
Smart CE, Ross K, Edge JA, Collins CE, Colyvas KJ, King BR, 'Children and adolescents on intensive insulin therapy maintain postprandial glycaemic control without precise carbohydrate counting', Diabetic Medicine, 26 279-285 (2009) [C1]
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Nova |
2008 |
Reeves SG, Rich D, Meldrum CJ, Colyvas KJ, Kurzawski G, Suchy J, et al., 'IGF1 is a modifier of disease risk in hereditary non-polyposis colorectal cancer', International Journal of Cancer, 123 1339-1343 (2008) [C1]
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Nova |
2005 |
Fahy KM, Colyvas KJ, 'Safety of the Stockholm birth center study: A critical review', Birth-Issues in Perinatal Care, 32 145-150 (2005) [C1]
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1998 |
Flanagan K, Colyvas K, Tuyl F, 'Injury after absence: a steel industry study', Journal of Occupational Health and Safety, Australia and New Zealand, 14 167-178 (1998)
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1982 |
COLYVAS K, TIETZE HR, EGRI SKJ, 'THE STRUCTURE OF DICHLORO(L-HISTIDINE)COPPER(II)', AUSTRALIAN JOURNAL OF CHEMISTRY, 35 1581-1586 (1982)
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1973 |
Colyvas K, Cooney RP, Walker WR, 'Laser raman and infrared spectral studies on imidazolium complexes of bivalent copper and zinc', Australian Journal of Chemistry, 26 2059-2062 (1973)
The complexes [imH2]2 [CuCl4], [imH2], [CuBr4], and [imH2]2[ZnCl4] containing the imidazolium cation [imH2]+ have been prepared for the first time and studied by laser Raman and i... [more]
The complexes [imH2]2 [CuCl4], [imH2], [CuBr4], and [imH2]2[ZnCl4] containing the imidazolium cation [imH2]+ have been prepared for the first time and studied by laser Raman and infrared spectroscopy. The spectroscopic data are compared to those from studies with imidazole, imidazolium chloride, methylammonium tetrachlorocuprate(II), caesium tetrachlorocuprate(II), and caesium tetrachlorozincate(II). It is concluded that in [imH2]2 [MCl4] (M = Cu and Zn), a distorted tetrahedral (D2d) model is favoured for [CuCl4]2- and that [ZnCl4]2- possesses a slight distortion from Td symmetry. © 1973, CSIRO. All rights reserved.
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