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Research Associate Professor Ari Samaranayaka

Contact Details

Phone
+64 3 479 7168
Email
ari.samaranayaka@otago.ac.nz
Position
Research Associate Professor and Biostatistician
Qualifications
BSc MPhil DipFGT DipFM PhD
Research summary
Methodological and biostatistical expertise in health-related research
Memberships
Research Ethics Committee, Department of Preventive and Social Medicine

Research

Associate Professor Ari Samaranayaka is a biostatistician in the Biostatistics Centre. He leads biostatistical and methodological aspects of health-related research projects in a range of disciplines such as public health, epidemiology, nephrology, physiotherapy, pharmacy, dentistry, immunology, and many more.

He works with many health researchers of varying capacities as research collaborator or a biostatistical advocate. He also provides supervision for postgraduate students in health-related and/or biostatistical research.

Publications

Derrett, S., Owen, H. E., Barson, D., Maclennan, B., Samaranayaka, A., Harcombe, H., & Wyeth, E. H. (2024). New Zealand’s Prospective Outcomes of Injury Study—10 years on (POIS-10): Descriptive outcomes to 12 years post-injury [Short report]. Injury Prevention. Advance online publication. doi: 10.1136/ip-2023-045058

Sopoaga, F., Nada-Raja, S., Leckie, T., Samaranayaka, A., & Covello, S. (2023). Mental health and well-being of first year Pacific students at a New Zealand university. Open Journal of Social Sciences, 11, 365-381. doi: 10.4236/jss.2023.117026

Cameron, C., Samaranayaka, A., & Turner, R. (2023). The review process from a biostatistics perspective [Invited feature]. New Zealand Medical Student Journal, 35, 34-36.

Harcombe, H., Barson, D., Samaranayaka, A., Davie, G., Wyeth, E., Derrett, S., & McBride, P. (2023). Predictors of hospital readmission after trauma: A retrospective cohort study in New Zealand. Injury, 54(6), 1546-1552. doi: 10.1016/j.injury.2023.03.009

Owen, H. E., Samaranayaka, A., Wyeth, E. H., & Derrett, S. (2023). Psychological distress 12 years following injury in New Zealand: Findings from the Prospective Outcomes of Injury Study: 10 years on (POIS-10). Injury Epidemiology, 10, 9. doi: 10.1186/s40621-023-00419-8

Derrett, S., Owen, H. E., Barson, D., Maclennan, B., Samaranayaka, A., Harcombe, H., & Wyeth, E. H. (2024). New Zealand’s Prospective Outcomes of Injury Study—10 years on (POIS-10): Descriptive outcomes to 12 years post-injury [Short report]. Injury Prevention. Advance online publication. doi: 10.1136/ip-2023-045058

Journal - Research Article

Chan, R., Walker, R. J., Samaranayaka, A., & Schollum, J. B. W. (2023). Long-term impact of early non-infectious complications at the initiation of peritoneal dialysis. Peritoneal Dialysis International, 43(1), 53-63. doi: 10.1177/08968608221132647

Journal - Research Article

Dixon, R., Derrett, S., Samaranayaka, A., Harcombe, H., Wyeth, E. H., Beaver, C., & Sullivan, M. (2023). Life satisfaction 18 months and 10 years following spinal cord injury: Results from a New Zealand prospective cohort study. Quality of Life Research. Advance online publication. doi: 10.1007/s11136-022-03313-w

Journal - Research Article

Harcombe, H., Barson, D., Samaranayaka, A., Davie, G., Wyeth, E., Derrett, S., & McBride, P. (2023). Predictors of hospital readmission after trauma: A retrospective cohort study in New Zealand. Injury, 54(6), 1546-1552. doi: 10.1016/j.injury.2023.03.009

Journal - Research Article

Norris, P., Cousins, K., Horsburgh, S., Keown, S., Churchward, M., Samaranayaka, A., Smith, A., & Marra, C. (2023). Impact of removing prescription co-payments on the use of costly health services: A pragmatic randomised controlled trial. BMC Health Services Research, 23, 31. doi: 10.1186/s12913-022-09011-0

Journal - Research Article

Owen, H. E., Samaranayaka, A., Wyeth, E. H., & Derrett, S. (2023). Psychological distress 12 years following injury in New Zealand: Findings from the Prospective Outcomes of Injury Study: 10 years on (POIS-10). Injury Epidemiology, 10, 9. doi: 10.1186/s40621-023-00419-8

Journal - Research Article

Sopoaga, F., Nada-Raja, S., Leckie, T., Samaranayaka, A., & Covello, S. (2023). Mental health and well-being of first year Pacific students at a New Zealand university. Open Journal of Social Sciences, 11, 365-381. doi: 10.4236/jss.2023.117026

Journal - Research Article

Ameratunga, S., Samaranayaka, A., Wyeth, E. H., Davie, G., Lilley, R., Wilson, S., Kokaua, J., & Derrett, S. (2022). Prevalence and predictors of post-traumatic stress symptoms in 2200 hospitalised and non-hospitalised injured New Zealanders. Australian & New Zealand Journal of Psychiatry, 56(10), 1344-1356. doi: 10.1177/00048674211060747

Journal - Research Article

Butcher, E., Walker, R., Wyeth, E., Samaranayaka, A., Schollum, J., & Derrett, S. (2022). Health-related quality of life and disability among older New Zealanders with kidney failure: A prospective study. Canadian Journal of Kidney Health & Disease. Advance online publication. doi: 10.1177/20543581221094712

Journal - Research Article

Cryer, C., Gulliver, P., Davie, G., Samaranayaka, A., & Fowler, C. (2022). Missing cases of injury death: Use of quantitative methods and case reviews to inform future improvements in case definition. Injury Prevention, 28, 156-164. doi: 10.1136/injuryprev-2021-044371

Journal - Research Article

Gray, A. R., Cameron, C., Samaranayaka, A., & Turner, R. M. (2022). What statistical software should I use? And does it actually matter? New Zealand Medical Student Journal, (34), 38-40. Retrieved from https://www.nzmsj.com/

Journal - Research Article

Kallarakkal, T. G., Siriwardena, B. S. M. S., Samaranayaka, A., De Silva, R., & Tilakaratne, W. M. (2022). A validated predictive model for risk of nodal metastasis in node negative oral squamous cell carcinoma of the buccal mucosa and tongue. Journal of Oral Pathology & Medicine, 51, 436-443. doi: 10.1111/jop.13294

Journal - Research Article

Maclennan, B., Wyeth, E., Samaranayaka, A., & Derrett, S. (2022). Predictors of EQ-5D-3L outcomes amongst injured Māori: 1-year post-injury findings from a New Zealand cohort study. Quality of Life Research, 31, 1689-1701. doi: 10.1007/s11136-022-03085-3

Journal - Research Article

McBride, D., Samaranayaka, A., Richardson, A., Gardner, D., Shepherd, D., Wyeth, E., de Graaf, B., & Derrett, S. (2022). Factors associated with self-reported health among New Zealand military veterans: A cross-sectional study. BMJ Open, 12, e056916. doi: 10.1136/bmjopen-2021-056916

Journal - Research Article

Taylor, J. E., McLean, R., Samaranayaka, A., & Connolly, M. J. (2022). How does driving anxiety relate to the health and quality of life of older drivers? Journal of Applied Gerontology, 41(5), 1312-1320. doi: 10.1177/07334648211072540

Journal - Research Article

Cameron, C., Turner, R., & Samaranayaka, A. (2021). Understanding confidence intervals and why they are so important. New Zealand Medical Student Journal, (33), 42-43. Retrieved from https://www.nzmsj.com/

Journal - Research Article

Connor, J., Brookland, R., & Samaranayaka, A. (2021). Older drivers and their future mobility: Views and involvement of their adult children. Journal of Applied Gerontology, 40(1), 55-66. doi: 10.1177/0733464819894545

Journal - Research Article

Leitch, S., Dovey, S., Cunningham, W., Wallis, K., Eggleton, K., Lillis, S., McMenamin, A., Williamson, M., Reith, D., Samaranayaka, A., & Tilyard, M. (2021). Epidemiology of healthcare harm in New Zealand general practice: A retrospective records review study. BMJ Open, 11, e048316. doi: 10.1136/bmjopen-2020-048316

Journal - Research Article

Narayanan, A., Gill, M., Leem, C., Li, C., Mein Smith, F., Shepherd, B., … Samaranayaka, A., Ergler, C., & Macmillan, A. (2021). Students' use of caffeine, alcohol, dietary supplements, and illegal substances for improving academic performance in a New Zealand university. Health Psychology & Behavioral Medicine, 9(1), 917-932. doi: 10.1080/21642850.2021.1990763

Journal - Research Article

Richardson, A. E., Derrett, S., Samaranayaka, A., & Wyeth, E. H. (2021). Prevalence and predictors of psychological distress following injury: Findings from a prospective cohort study. Injury Epidemiology, 8(1), 41. doi: 10.1186/s40621-021-00337-7

Journal - Research Article

Richardson, A., Samaranayaka, A., Sullivan, M., & Derrett, S. (2021). Secondary health conditions and disability among people with spinal cord injury: A prospective cohort study. Journal of Spinal Cord Medicine, 44(1), 19-28. doi: 10.1080/10790268.2019.1581392

Journal - Research Article

Samaranayaka, A., Cameron, C., & Turner, R. M. (2021). Sample size in health research. New Zealand Medical Student Journal, 32, 52-54. Retrieved from https://www.nzmsj.com/

Journal - Research Article

Shettigar, R., Samaranayaka, A., Schollum, J. B. W., Wyeth, E. H., Derrett, S., & Walker, R. J. (2021). Predictors of health deterioration among older New Zealanders undergoing dialysis: A three-year accelerated longitudinal cohort study. Canadian Journal of Kidney Health & Disease, 8. doi: 10.1177/20543581211022207

Journal - Research Article

Cameron, C., Samaranayaka, A., & Turner, R. M. (2020). P values: What are their significance? New Zealand Medical Student Journal, 31, 48-49.

Journal - Research Article

Harcombe, H., Samaranayaka, A., Wyeth, E. H., Davie, G., Cameron, I. D., Lilley, R., & Derrett, S. (2020). Predictors of subsequent injury at work: Findings from a prospective cohort of injured workers in New Zealand. Occupational & Environmental Medicine, 77, 839-846. doi: 10.1136/oemed-2020-106597

Journal - Research Article

Richardson, A., Gurung, G., Samaranayaka, A., Gardner, D., de Graaf, B., Wyeth, E. H., Derrett, S., … McBride, D. (2020). Risk and protective factors for post-traumatic stress among New Zealand military personnel: A cross sectional study. PLoS ONE, 15(4), e0231460. doi: 10.1371/journal.pone.0231460

Journal - Research Article

Sopoaga, F., Nada-Raja, S., Leckie, T., & Samaranayaka, A. (2020). Mental health and wellbeing of Pacific students: Protocol of a Pacific perspective study. Pacific Health Dialog, 21(5), 272-280. doi: 10.26635/phd.2020.626

Journal - Research Article

Turner, R., Samaranayaka, A., & Cameron, C. (2020). Parametric vs nonparametric statistical methods: Which is better, and why? New Zealand Medical Student Journal, 30, 61-62.

Journal - Research Article

Baker, W., Samaranayaka, A., Wyeth, E., Ameratunga, S., & Derrett, S. (2019). Migrants and disability following injury: Findings from a prospective study in New Zealand. Australian & New Zealand Journal of Public Health, 43(5), 470-476. doi: 10.1111/1753-6405.12927

Journal - Research Article

Chan, J. E., Samaranayaka, A., & Paterson, H. (2019). Seasonal and gestational variation in perinatal depression in a prospective cohort in New Zealand. Australian & New Zealand Journal of Obstetrics & Gynaecology, 59, 514-522. doi: 10.1111/ajo.12912

Journal - Research Article

Cryer, C., Davie, G., Gulliver, P., & Samaranayaka, A. (2019). Use of mixed methods to investigate case definitions to improve the identification of serious injury cases from hospital episode data. Injury Prevention, 25(6), 552-556. doi: 10.1136/injuryprev-2019-043293

Journal - Research Article

Derrett, S., Gunter, K. E., Samaranayaka, A., Singer, S. J., Nocon, R. S., Quinn, M. T., … Chin, M. H. (2019). Development and testing of the Provider and Staff Perceptions of Integrated Care (PSPIC) survey. Medical Care Research & Review, 76(6), 807-829. doi: 10.1177/1077558717745936

Journal - Research Article

McNoe, B., Schollum, J. B. W., Derrett, S., Marshall, M. R., Henderson, A., Samaranayaka, A., & Walker, R. J. (2019). Recruitment and participant baseline characteristics in the dialysis outcomes in those aged 65 years or older study. BMC Nephrology, 20, 137. doi: 10.1186/s12882-019-1328-8

Journal - Research Article

Samaranayaka, A., Turner, R., & Cameron, C. (2019). Kaplan-Meier plots. New Zealand Medical Student Journal, 28, 45-46.

Journal - Research Article

Turner, R. M., Cameron, C., & Samaranayaka, A. (2019). Understanding receiver operator characteristic (ROC) curves. New Zealand Medical Student Journal, 29, 50-51.

Journal - Research Article

Wyeth, E. H., Samaranayaka, A., Lambert, M., Tapsell, M., Anselm, D., Ellison, P., … Derrett, S. (2019). Understanding longer-term disability outcomes for Māori and non-Māori after hospitalisation for injury: Results from a longitudinal cohort study. Public Health, 176, 118-127. doi: 10.1016/j.puhe.2018.08.014

Journal - Research Article

Wyeth, E., Lambert, M., Samaranayaka, A., Harcombe, H., Davie, G., & Derrett, S. (2019). Subsequent injuries experienced by Māori: Results from a 24-month prospective study in New Zealand. New Zealand Medical Journal, 132(1499), 23-35. Retrieved from https://www.nzma.org.nz/journal

Journal - Research Article

Davie, G., Samaranayaka, A., & Derrett, S. (2018). The role of pre-existing comorbidity on the rate of recovery following injury: A longitudinal cohort study. PLoS ONE, 13(2), e0193019. doi: 10.1371/journal.pone.0193019

Journal - Research Article

De Silva, R. K., Siriwardena, B. S. M. S., Samaranayaka, A., Abeyasinghe, W. A. M. U. L., & Tilakaratne, W. M. (2018). A model to predict nodal metastasis in patients with oral squamous cell carcinoma. PLoS ONE, 13(8), e0201755. doi: 10.1371/journal.pone.0201755

Journal - Research Article

Harcombe, H., Davie, G., Wyeth, E., Samaranayaka, A., & Derrett, S. (2018). Injury upon injury: A prospective cohort study examining subsequent injury claims in the 24 months following a substantial injury. Injury Prevention, 24(6), 460-467. doi: 10.1136/injuryprev-2017-042467

Journal - Research Article

Leitch, S., Dovey, S. M., Samaranayaka, A., Reith, D. M., Wallis, K. A., Eggleton, K. S., … Williamson, M. I., … Tilyard, M. W. (2018). Characteristics of a stratified random sample of New Zealand general practices. Journal of Primary Health Care, 10(2), 114-124. doi: 10.1071/HC17089

Journal - Research Article

Samaranayaka, S., Walker, R. J., Samaranayaka, A., Derrett, S., & Schollum, J. B. W. (2018). Medication exposure and health outcomes in older patients with end-stage kidney disease: A prospective study undertaken in New Zealand. Drugs & Aging, 35, 1005-1015. doi: 10.1007/s40266-018-0582-y

Journal - Research Article

Taylor, J. E., Connolly, M. J., Brookland, R., & Samaranayaka, A. (2018). Understanding driving anxiety in older adults. Maturitas, 118, 51-55. doi: 10.1016/j.maturitas.2018.10.008

Journal - Research Article

Windner, Z., Crengle, S., de Graaf, B., Samaranayaka, A., & Derrett, S. (2018). New Zealanders' experiences and pathways to a diagnosis of bowel cancer: A cross-sectional descriptive study of a younger cohort. New Zealand Medical Journal, 131(1483), 30-39. Retrieved from https://www.nzma.org.nz/journal

Journal - Research Article

Derrett, S., Samaranayaka, A., Schollum, J. B. W., McNoe, B., Marshall, M. R., Williams, S., Wyeth, E. H., & Walker, R. J. (2017). Predictors of health deterioration among older adults after 12 months of dialysis therapy: A longitudinal cohort study from New Zealand. American Journal of Kidney Diseases, 70(6), 798-806. doi: 10.1053/j.ajkd.2017.06.023

Journal - Research Article

Hoye, N. A., Wilson, L. C., Wilkins, G. T., Jardine, D. L., Putt, T. L., Samaranayaka, A., Schollum, J. B. W., & Walker, R. J. (2017). Endovascular renal denervation in end-stage kidney disease patients: Cardiovascular protection: A proof-of-concept study. Kidney International Reports, 2(5), 856-865. doi: 10.1016/j.ekir.2017.04.012

Journal - Research Article

Page, M. J., Wyeth, E. H., Samaranayaka, A., McNoe, B., Walker, R. C., Schollum, J., … Walker, R., & Derrett, S. (2017). Accuracy of ethnicity data recorded in hospital-based patient clinical records and the Australia and New Zealand Dialysis and Transplant Registry. New Zealand Medical Journal, 130(1454), 65-71. Retrieved from https://www.nzma.org.nz/journal

Journal - Research Article

Samaranayaka, C., Samaranayaka, A., Barson, D., & De Silva, R. K. (2017). Factors influencing trends in trauma-associated orbital cavity reconstruction procedures and time delay: New Zealand national data 2000–2014. Trauma, 20(4), 258-267. doi: 10.1177/1460408617719477

Journal - Research Article

Wyeth, E. H., Samaranayaka, A., Davie, G., & Derrett, S. (2017). Prevalence and predictors of disability for Māori 24 months after injury. Australian & New Zealand Journal of Public Health, 41(3), 262-268. doi: 10.1111/1753-6405.12657

Journal - Research Article

Harcombe, H., Samaranayaka, A., & Derrett, S. (2016). Predictors of reduced frequency of physical activity 3 months after injury: Findings from the prospective outcomes of injury study. Physical Therapy, 96(12), 1885-1895. doi: 10.2522/ptj.20160038

Journal - Research Article

Nixon, G., Samaranayaka, A., de Graaf, B., McKechnie, R., Rodwell, P., & Blattner, K. (2015). The impact of a rural scanner in overcoming urban versus rural disparities in the utilisation of computed tomography. Australian Journal of Rural Health, 23, 150-154. doi: 10.1111/ajr.12125

Journal - Research Article

Slatter, T. L., Hsia, H., Samaranayaka, A., Sykes, P., Clow, W., Devenish, C. J., … Royds, J. A., … Hung, N. A. (2015). Loss of ATRX and DAXX expression identifies poor prognosis for smooth muscle tumours of uncertain malignant potential and early stage uterine leiomyosarcoma. Journal of Pathology: Clinical Research, 1(2), 95-105. doi: 10.1002/cjp2.11

Journal - Research Article

Connor, J., Cousins, K., Samaranayaka, A., & Kypri, K. (2014). Situational and contextual factors that increase the risk of harm when students drink: Case-control and case-crossover investigation. Drug & Alcohol Review, 33(4), 401-411. doi: 10.1111/dar.12172

Journal - Research Article

Cryer, C., Langley, J. D., Samaranayaka, A., Davie, G., Morgaine, K., Lilley, R., & Barson, D. (2014). An outcome evaluation of a New Zealand farm safety intervention: A historical cohort study. American Journal of Industrial Medicine, 57(4), 458-467. doi: 10.1002/ajim.22290

Journal - Research Article

Cryer, C., Samaranayaka, A., Langley, J. D., & Davie, G. (2014). The epidemiology of life-threatening work-related injury: A demonstration paper. American Journal of Industrial Medicine, 57(4), 425-437. doi: 10.1002/ajim.22301

Journal - Research Article

Harcombe, H., Derrett, S., Samaranayaka, A., Davie, G., Wyeth, E., & Wilson, S. (2014). Factors predictive of subsequent injury in a longitudinal cohort study. Injury Prevention, 20(6), 393-400. doi: 10.1136/injuryprev-2014-041183

Journal - Research Article

Langley, J. D., Lilley, R., Wilson, S., Derrett, S., Samaranayaka, A., Davie, G., … Wyeth, E. H., Hansen, P., & Hokowhitu, B. (2014). Factors associated with non-participation in one or two follow-up phases in a cohort study of injured adults. Injury Prevention, 19, 428-433. doi: 10.1136/injuryprev-2012-040685

Journal - Research Article

Langley, J., Lilley, R., Samaranayaka, A., & Derrett, S. (2014). Work status and disability trajectories over 12 months after injury among workers in New Zealand. New Zealand Medical Journal, 127(1390). Retrieved from http://www.nzma.org.nz/journal

Journal - Research Article

Nixon, G., Samaranayaka, A., de Graaf, B., McKechnie, R., Blattner, K., & Dovey, S. (2014). Geographic disparities in the utilisation of computed tomography scanning services in southern New Zealand. Health Policy, 118(2), 222-228. doi: 10.1016/j.healthpol.2014.05.002

Journal - Research Article

Wilson, S. J., Derrett, S., Cameron, I. D., Samaranayaka, A., Davie, G., & Langley, J. (2014). Prevalence of poor outcomes soon after injury and their association with the severity of the injury. Injury Prevention, 20, 57-61. doi: 10.1136/injuryprev-2012-040690

Journal - Research Article

Chalmers, D. J., Samaranayaka, A., & McNoe, B. M. (2013). Risk factors for injury in community-level football: A cohort study. International Journal of Injury Control & Safety Promotion, 20(1), 68-78. doi: 10.1080/17457300.2012.674044

Journal - Research Article

Derrett, S., Wilson, S., Samaranayaka, A., Langley, J., Wyeth, E., Ameratunga, S., Lilley, R., Davie, G., & Mauiliu, M. (2013). Prevalence and predictors of disability 24-months after injury for hospitalised and non-hospitalised participants: Results from a longitudinal cohort study in New Zealand. PLoS ONE, 8(11), e80194. doi: 10.1371/journal.pone.0080194

Journal - Research Article

Langley, J., Begg, D., Samaranayaka, A., Brookland, R., & Weiss, H. (2013). Unsupervised driving by learner licence holders: Associated characteristics and crash risk. Accident Analysis & Prevention, 60, 24-30. doi: 10.1016/j.aap.2013.07.021

Journal - Research Article

Langley, J., Samaranayaka, A., & Begg, D. J. (2013). Age, period and cohort effects on the incidence of motorcyclist casualties in traffic crashes. Injury Prevention, 19(3), 153-157. doi: 10.1136/injuryprev-2012-040345

Journal - Research Article

Mauiliu, M., Derrett, S., Samaranayaka, A., Sopoaga, F., Kokaua, J., & Davie, G. (2013). Pacific peoples three months after injury: A comparison of outcomes between Pacific and non-Pacific participants in a NZ cohort study. Australian & New Zealand Journal of Public Health, 37(5), 463-469. doi: 10.1111/1753-6405.12124

Journal - Research Article

Wyeth, E. H., Derrett, S., Hokowhitu, B., & Samaranayaka, A. (2013). Indigenous injury outcomes: Life satisfaction among injured Māori in New Zealand three months after injury. Health & Quality of Life Outcomes, 11, 120. doi: 10.1186/1477-7525-11-120

Journal - Research Article

Begg, D., Sullman, M., & Samaranayaka, A. (2012). The characteristics of young pre-licensed drivers: Evidence from the New Zealand Drivers Study. Accident Analysis & Prevention, 45, 539-546. doi: 10.1016/j.aap.2011.09.006

Journal - Research Article

Chalmers, D. J., Samaranayaka, A., Gulliver, P., & McNoe, B. (2012). Risk factors for injury in rugby union football in New Zealand: A cohort study. British Journal of Sports Medicine, 46(2), 95-102. doi: 10.1136/bjsports-2011-090272

Journal - Research Article

Derrett, S., Samaranayaka, A., Wilson, S., Langley, J., Ameratunga, S., Cameron, I. D., Lilley, R., Wyeth, E., & Davie, G. (2012). Prevalence and predictors of sub-acute phase disability after injury among hospitalised and non-hospitalised groups: A longitudinal cohort study. PLoS ONE, 7(9), e44909. doi: 10.1371/journal.pone.0044909

Journal - Research Article

Langley, J., Begg, D., Brookland, R., Samaranayaka, A., Jordan, H., & Davie, G. (2012). Nonprogression through graduated driver licensing: Characteristics, traffic offending, and reasons for nonprogression. Traffic Injury Prevention, 13(1), 7-13. doi: 10.1080/15389588.2011.635170

Journal - Research Article

Wilson, S. J., Begg, D. J., & Samaranayaka, A. (2012). Validity of using linked hospital and police traffic crash records to analyse motorcycle injury crash characteristics. Accident Analysis & Prevention, 49, 30-35. doi: 10.1016/j.aap.2011.03.007

Journal - Research Article

Cryer, C., Gulliver, P., Langley, J., Davie, G., Samaranayaka, A., & Fowler, C. (2011). A proposed theoretical definition to address the undercounting of injury deaths. Injury Prevention, 17, 219-221. doi: 10.1136/injuryprev-2011-040039

Journal - Research Article

Davie, G., Samaranayaka, A., Langley, J. D., & Barson, D. (2011). Estimating person-based injury incidence: Accuracy of an algorithm to identify readmissions from hospital discharge data. Injury Prevention, 17(5), 338-342. doi: 10.1136/injuryprev-2011-040090

Journal - Research Article

Derrett, S., Davie, G., Ameratunga, S., Wyeth, E., Colhoun, S., Wilson, S., Samaranayaka, A., Lilley, R., Hokowhitu, B., Hansen, P., & Langley, J. (2011). Prospective Outcomes of Injury Study: Recruitment, and participant characteristics, health and disability status. Injury Prevention, 17(6), 415-418. doi: 10.1136/injuryprev-2011-040044

Journal - Research Article

Kypri, K., Samaranayaka, A., Connor, J., Langley, J. D., & MacLennan, B. (2011). Non-response bias in a web-based health behaviour survey of New Zealand tertiary students. Preventive Medicine, 53(4-5), 274-277. doi: 10.1016/j.ypmed.2011.07.017

Journal - Research Article

Langley, J., Samaranayaka, A., Davie, G., & Campbell, A. J. (2011). Age, cohort and period effects on hip fracture incidence: Analysis and predictions from New Zealand data 1974-2007. Osteoporosis International, 22(1), 105-111. doi: 10.1007/s00198-010-1205-6

Journal - Research Article

Samaranayaka, A., & Fletcher, D. (2010). Modelling environmental stochasticity in adult survival for a long-lived species. Ecological Modelling, 221(3), 423-427. doi: 10.1016/j.ecolmodel.2009.10.016

Journal - Research Article

Davie, G., Langley, J., Samaranayaka, A., & Weatherspoon, M. E. (2008). Accuracy of injury coding under ICD-10-AM for New Zealand public hospital discharges. Injury Prevention, 14, 319-323. doi: 10.1136/ip.2007.017954

Journal - Research Article

dos Santos Dias, C. T., Samaranayaka, A., & Manly, B. (2008). On the use of correlated beta random variables with animal population modelling. Ecological Modelling, 215, 293-300.

Journal - Research Article

Samaranayaka, A., Engås, A., & Jørgensen, T. (1997). Effects of hanging ratio and fishing depth on the catch rates of drifting tuna gillnets in Sri Lankan waters. Fisheries Research, 29, 1-12.

Journal - Research Article

Cameron, C., Samaranayaka, A., & Turner, R. (2023). The review process from a biostatistics perspective [Invited feature]. New Zealand Medical Student Journal, 35, 34-36.

Journal - Research Other

Cousins, K., Norris, P., Horsburgh, S., Smith, A., Keown, S., Samaranayaka, A., Marra, C., & Churchward, M. (2021). Impact of removing prescription charges on health outcomes: Protocol for a randomised controlled trial. BMJ Open, 11, e049261. doi: 10.1136/bmjopen-2021-049261

Journal - Research Other

Derrett, S., Wyeth, E. H., Richardson, A., Davie, G., Samaranayaka, A., Lilley, R., & Harcombe, H. (2021). Prospective Outcomes of Injury Study 10 Years on (POIS-10): An observational cohort study. Methods & Protocols, 4(2), 35. doi: 10.3390/mps4020035

Journal - Research Other

Derrett, S., Harcombe, H., Wyeth, E., Davie, G., Samaranayaka, A., Hansen, P., … Sullivan, T., Wilson, S., & Barson, D. (2017). Subsequent Injury Study (SInS): Improving outcomes for injured New Zealanders. Injury Prevention, 23(6), 429. doi: 10.1136/injuryprev-2016-042193

Journal - Research Other

Dovey, S. M., Leitch, S., Wallis, K. A., Eggleton, K. S., Cunningham, W. K., Williamson, M. I., … Tilyard, M. W., Reith, D. M., Samaranayaka, A., & Hall, J. E. (2017). Epidemiology of patient harms in New Zealand: Protocol of a general practice records review study. JMIR Research Protocols, 6(1), e10. doi: 10.2196/resprot.6696

Journal - Research Other

Tun, T., Nyunt, W. W., Latt, K. Z., Samaranayaka, A., Crump, J. A., Thinn, K. K., Cook, G. M., & Aung, H. L. (2016). Drug-resistant tuberculosis among previously treated patients in Yangon, Myanmar. International Journal of Mycobacteriology, 5(3), 366-367. doi: 10.1016/j.ijmyco.2016.06.004

Journal - Research Other

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