Mr Kim Colyvas

Mr Kim Colyvas

Consulting Unit Manager

School of Mathematical and Physical Sciences (Statistics)

Career Summary

Biography

Research Expertise
Application of Statistics over a wide range of areas, mainly focused in Psychology, Ecology and Biology but also covering Health and Medicine, Linguistics and Speech pathology, Education, Business, Engineering, various sciences including Chemistry, Geology and Physics and industrial applications.  

Statistical help is provided in the analysis of data to understand the important effects in a study, setting up data in preparation for analysis, use of statistical software, how to prepare reports for publication, design of experiments, visualising data, process improvement, Total Quality Management, Statistical Process Control, sampling of raw materials, measurement systems and their performance.


Qualifications

  • Master of Statistics, University of Newcastle
  • Bachelor of Science (Honours), University of Newcastle
  • Master of Science, University of Newcastle

Keywords

  • Ecology
  • Health
  • Psychology
  • Statistics

Languages

  • English (Mother)
  • Greek (Working)

Fields of Research

Code Description Percentage
111199 Nutrition and Dietetics not elsewhere classified 50
111499 Paediatrics and Reproductive Medicine not elsewhere classified 25
111799 Public Health and Health Services not elsewhere classified 25
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Publications

For publications that are currently unpublished or in-press, details are shown in italics.


Journal article (26 outputs)

Year Citation Altmetrics Link
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)

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 st... [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.

DOI 10.1111/bij.12589
Co-authors Simon Clulow
2015 Dempsey I, Valentine M, Colyvas K, 'The Effects of Special Education Support on Young Australian School Students', International Journal of Disability, Development and Education, (2015)

© 2015 Taylor & Francis Determining the effectiveness of many special education interventions is most difficult because of the practical and ethical limitations associated with a... [more]

© 2015 Taylor & Francis Determining the effectiveness of many special education interventions is most difficult because of the practical and ethical limitations associated with assigning participants to a control or non-treated group. Using Longitudinal Study of Australian Children data, this article utilised eight different propensity score analysis methods to determine if a cohort of young primary school children receiving special education services significantly improved their literacy and numeracy skills, social skills and their behaviour, two years after the commencement of the special service, in comparison to a ¿matched¿ group of students who did not receive special education support. The children receiving special education support performed statistically significantly less well than the different matched groups across all outcome measures. This result is consistent with the findings from two similar studies in the US and calls into question the effectiveness of special education services for the majority of Australian students with additional needs.

DOI 10.1080/1034912X.2015.1091066
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]

© 2015 American Speech-Language-Hearing Association. Purpose: Case-study methodology studying change is often used in the field of speech-language pathology, but it can be critic... [more]

© 2015 American Speech-Language-Hearing Association. 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.

DOI 10.1044/2015_JSLHR-S-14-0158
Co-authors Rachael Unicomb, Sally Hewat
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]
DOI 10.17061/phrp2521519
Co-authors Jane Taylor
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]

© 2015 Informa UK Ltd. Decline in linguistic function has been associated with decline in cognitive function in previous research. This research investigated the informativeness ... [more]

© 2015 Informa UK Ltd. 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.

DOI 10.3109/02699206.2014.956263
Co-authors Alison Ferguson, Hugh Craig, Elizabeth Spencer
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)
DOI 10.1007/s00192-013-2267-8
Citations Scopus - 5Web of Science - 3
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]
DOI 10.1016/j.cortex.2013.05.012
Citations Scopus - 2Web of Science - 1
Co-authors Hugh Craig, Alison Ferguson, Elizabeth Spencer
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]
DOI 10.1111/jir.12066
Citations Scopus - 3Web of Science - 1
Co-authors Phil Foreman, Michael Arthur-Kelly
2014 Patrick JW, Colyvas K, 'Crop yield components - photoassimilate supply- or utilisation limited-organ development?', FUNCTIONAL PLANT BIOLOGY, 41 893-913 (2014) [C1]
DOI 10.1071/FP14048
Citations Scopus - 5Web of Science - 2
Co-authors John Patrick
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]

© The Author 2014. Published by Oxford University Press on behalf of the Society for Research on Nicotine and Tobacco. All rights reserved. Introduction: Persons with a mental di... [more]

© The Author 2014. Published by Oxford University Press on behalf of the Society for Research on Nicotine and Tobacco. All rights reserved. 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.

DOI 10.1093/ntr/ntu097
Citations Scopus - 1
Co-authors Jenny Bowman, Richard Clancy, John Wiggers, Amanda Baker
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]
DOI 10.1080/02687038.2013.803514
Citations Scopus - 1Web of Science - 1
Co-authors Hugh Craig, Alison Ferguson, Elizabeth Spencer
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]
DOI 10.1111/pan.12251
Co-authors Rohan Stanger
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]
Citations Scopus - 3Web of Science - 3
Co-authors Hugh Craig, Elizabeth Spencer, Alison Ferguson
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]
Citations Scopus - 5Web of Science - 5
Co-authors Clare Collins
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]
Citations Scopus - 8Web of Science - 7
Co-authors John Wiggers, Jenny Bowman
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]
DOI 10.1542/peds.2010-1518
Citations Scopus - 44Web of Science - 35
Co-authors Tracy Burrows, Philip Morgan, Clare Collins
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]
DOI 10.1249/MSS.0b013e3181e741e8
Citations Scopus - 24Web of Science - 18
Co-authors Philip Morgan
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]
DOI 10.4156/jcit.vol5.issue2.1
Citations Scopus - 5
Co-authors Suhuai Luo, Peter Summons
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]
DOI 10.3109/00048671003646751
Citations Scopus - 19Web of Science - 14
Co-authors Jenny Bowman, Amanda Baker
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]
DOI 10.1016/j.jpeds.2010.03.028
Citations Scopus - 39Web of Science - 38
Co-authors Clare Collins, Tracy Burrows, Philip Morgan
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]
DOI 10.1038/oby.2008.495
Citations Scopus - 45Web of Science - 30
Co-authors Clare Collins, Manohar Garg, Tracy Burrows
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]
DOI 10.1093/bja/aep160
Citations Scopus - 6Web of Science - 4
Co-authors Rohan Stanger
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]
DOI 10.1111/j.1464-5491.2009.02669.x
Citations Scopus - 26Web of Science - 15
Co-authors Clare Collins, Bruce King
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]
DOI 10.1002/ijc.23668
Citations Scopus - 19Web of Science - 17
Co-authors Rodney Scott
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]
DOI 10.1111/j.0730-7659.2005.00358.x
Citations Scopus - 2Web of Science - 1
1982 COLYVAS K, TIETZE HR, EGRI SKJ, 'THE STRUCTURE OF DICHLORO(L-HISTIDINE)COPPER(II)', AUSTRALIAN JOURNAL OF CHEMISTRY, 35 1581-1586 (1982)
Citations Web of Science - 9
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Conference (12 outputs)

Year Citation Altmetrics Link
2015 Spencer E, Ferguson A, Craig DH, Colyvas K, Hankey G, Flicker L, '45th Clinical Aphasiology Conference.' (2015)
Co-authors Hugh Craig, Alison Ferguson, Elizabeth Spencer
2014 Stockings EA, Bowman JA, Baker AL, Terry M, Clancy R, Wye PM, et al., 'IMPACT OF A POST-DISCHARGE SMOKING CESSATION INTERVENTION FOR SMOKERS ADMITTED TO A SMOKE-FREE PSYCHIATRIC HOSPITAL: A RANDOMISED CONTROLLED TRIAL', ASIA-PACIFIC JOURNAL OF CLINICAL ONCOLOGY (2014) [E3]
Co-authors John Wiggers, Jenny Bowman, Amanda Baker, Richard Clancy
2014 Stockings EA, Bowman JA, Bartlem KM, McElwaine KM, Baker AL, Terry M, et al., 'QUALITY OF IMPLEMENTATION OF A SMOKE-FREE POLICY IN AN INPATIENT PSYCHIATRIC FACILITY: ASSOCIATION WITH PATIENT ACCEPTABILITY', ASIA-PACIFIC JOURNAL OF CLINICAL ONCOLOGY (2014) [E3]
Co-authors John Wiggers, Amanda Baker, Jenny Bowman, Richard Clancy
2013 Spencer EL, Craig H, Colyvas K, 'Propositional Idea Density in written descriptions of health: Potential clinical applications', . (2013)
Co-authors Elizabeth Spencer, Hugh Craig
2013 Spencer E, Ferguson A, Craig DH, Colyvas K, '43rd Clinical Aphasiology Conference' (2013)
Co-authors Elizabeth Spencer, Hugh Craig, Alison Ferguson
2012 Bowman JA, Wiggers JH, Colyvas KJ, Wye PM, Walsh RA, Bartlem K, 'The need and potential for assisting clients of opioid substitution programs to quit smoking', Drug and Alcohol Review: Abstracts of the Australasian Professional Society on Alcohol and other Drugs Conference 2012 (2012) [E3]
Co-authors John Wiggers, Jenny Bowman
2011 Colyvas KJ, Moffiet TN, 'Statistical consulting under ASEARC', Proceedings of the 4th Applied Statistics Education and Research Collaboration (ASEARC) Conference (2011) [E3]
Co-authors Trevor Moffiet
2008 O'Brien S, Michie PT, Halpin S, Colyvas KJ, Schall UA, Carr VJ, 'Neuropsychological profiles in ultra high risk individuals and in first episode of psychosis or schizophrenia', Early Intervention in Psychiatry (2008) [E3]
Co-authors Sean Halpin, Pat Michie, Ulrich Schall
2008 Guy LM, Learmouth A, Colyvas KJ, Peres C, Pitkin A, 'Effects of a workplace health & wellness program on employee fitness, strength and well-being', The Safety Conference. Abstracts (2008) [E3]
2008 Phillips L, Turner A, Hambridge J, Baker AL, Bowman JA, Colyvas KJ, 'Clinical outcomes associated with depression, anxiety and social support among cardiac rehabiliation attendees', Australian and New Zealand Journal of Psychiatry (2008) [E3]
Co-authors Jenny Bowman, Amanda Baker
2008 Michie PT, O'Brien-Dines ST, Halpin S, Colyvas KJ, Schall UA, Carr VJ, 'Neurophychological profiles of young people at risk of developing schizophrenia', Schizophrenia Research (2008) [E3]
DOI 10.1016/s0920-9964(08)70468-7
Co-authors Pat Michie, Ulrich Schall
2007 Reeves SG, Scott R, Rich D, Meldrum CJ, Colyvas KJ, Kurzawski G, et al., 'IGF-1 is a modifier of disease risk in Hereditary non-polyposis colorectal cancer', Journal of Medical Genetics (2007) [E3]
Co-authors Rodney Scott
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Mr Kim Colyvas

Positions

Consulting Unit Manager
School of Mathematical and Physical Sciences
Faculty of Science and Information Technology

Casual Senior Research Assistant
School of Engineering
Faculty of Engineering and Built Environment

Focus area

Statistics

Contact Details

Email kim.colyvas@newcastle.edu.au
Phone (02) 4921 7759
Fax (02) 4921 6898

Office

Room V240
Building Mathematics
Location Callaghan
University Drive
Callaghan, NSW 2308
Australia
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