Brandon de Graaf

2026

Journal - Research Article

Satherley, N., de Graaf, B., Davie, G., Petrović-van der Deen, F. S., Gibb, S., Teng, A., & Sporle, A. (2026). Gastric cancer survival (in)equity from 2002 to 2021: Examining demographic and clinical characteristics among Māori and non-Māori. New Zealand Medical Journal/Te ara tika o te hauora hapori, 139(1632), 44-70. doi: 10.26635/6965.7181

Withington, S., Davie, G., Crengle, S., James, M., Booker, B., de Graaf, B., Miller, R., … Nixon, G. (2026). Rural urban differences in receipt of radiation oncology services for breast, prostate and lung cancer by ethnicity in Aotearoa New Zealand. Journal of Medical Imaging & Radiation Oncology, 70(1), 101-112. doi: 10.1111/1754-9485.70049

2025

Journal - Research Article

Satherley, N., de Graaf, B., Davie, G., Gibb, S., Teng, A., & Sporle, A. (2025). Applying Indigenous identity definitions in official health statistics: A case study using linked cancer registry data on stomach cancer. New Zealand Medical Journal/Te ara tika o te hauora hapori, 138(1614), 81-90. doi: 10.26635/6965.6844

2024

Journal - Research Article

Miller, R., Davie, G., Crengle, S., Liepins, T., Clay, L., Whitehead, J., Taafaki, J., de Graaf, B., & Nixon, G. (2024). Development of an interactive web app to examine rural-urban variation in COVID-19 vaccination rates and to inform case study site selection. New Zealand Population Review, 50, 325-351. Retrieved from https://population.org.nz/journal/

Davie, G., Whitehead, J., Miller, R., Atkinson, J., Crengle, S., de Graaf, B., Lawrenson, R., Smith, M., & Nixon, G. (2024). Accuracy of domicile codes in New Zealand's hospital discharge data and implications for urban-rural analyses. New Zealand Population Review, 50, 42-70. Retrieved from https://population.org.nz/journal/

Miller, R., Davie, G., Crengle, S., Whitehead, J., De Graaf, B., & Nixon, G. (2024). Avoiding double counting: The effect of bundling hospital events in administrative datasets for the interpretation of rural-urban differences in Aotearoa New Zealand. Journal of Clinical Epidemiology, 172, 111400. doi: 10.1016/j.jclinepi.2024.111400

Nixon, G., Davie, G., Whitehead, J., Miller, R., de Graaf, B., Liepins, T., Lawrenson, R., & Crengle, S. (2024). Rural-urban variation in the utilisation of publicly funded healthcare services: An age-stratified population-level observational study. New Zealand Medical Journal/Te ara tika o te hauora hapori, 137(1590), 33-47. Retrieved from https://www.nzmj.org.nz/

Liepins, T., Davie, G., Miller, R., Whitehead, J., De Graaf, B., Clay, L., Crengle, S., & Nixon, G. (2024). Rural-urban variation in COVID-19 vaccination uptake in Aotearoa New Zealand: Examining the national roll-out. Epidemiology & Infection, 152, e7. doi: 10.1017/s0950268823001978

Conference Contribution - Published proceedings: Abstract

Lilley, R., Dicker, B., Campbell, N., Montoya, L., Ameratunga, S., Reid, P., … de Graaf, B., & Kool, B. (2024). The impact of indirect transport to a trauma centre on short-term survival for major trauma patients. Injury Prevention, 30(Suppl. 1), 272. doi: 10.1136/injuryprev-2024-SAFETY.141

Saha, S., Davie, G., de Graaf, B., Miller, M., Ussher, J., van Binnendijk, R., & McIntyre, P. (2024). Measles antibody responses in tertiary students to third dose of measles-mumps-rubella vaccine. Proceedings of the Communicable Diseases & Immunisation Conference: Protecting Communities: Empowering Health through Disease Control and Immunisation. 363. [Abstract]

Saha, S., Davie, G., de Graaf, B., Miller, M., Ussher, J., van Binnendijk, R., & McIntyre, P. (2024). Accuracy of thresholds for measles seroprotection in immunized young adults. Proceedings of the Communicable Diseases & Immunisation Conference: Protecting Communities: Empowering Health through Disease Control and Immunisation. 361. [Abstract]

Conference Contribution - Verbal presentation and other Conference outputs

Saha, S., Davie, G., de Graaf, B., Miller, M., Ussher, J., van Binnendijk, R., & McIntyre, P. (2024, November). Limitations of serological screening for low measles immunity in health-science students fully vaccinated in childhood. Verbal presentation at the Infectious Diseases & Pandemic Preparedness Summit, Wellington, New Zealand.

2023

Journal - Research Article

Whitehead, J., Atkinson, J., Davie, G., De Graaf, B., Eggleton, K., Crengle, S., Miller, R., Blattner, K., Crampton, P., & Nixon, G. (2023). Comparison of the sociodemographic composition of rural and urban Aotearoa New Zealand: Insights from applying the geographic classification for health to the 2018 census. New Zealand Population Review, 49, 27-69.

Nixon, G., Davie, G., Whitehead, J., Miller, R., de Graaf, B., Lawrenson, R., Smith, M., … Crengle, S. (2023). Comparison of urban and rural mortality rates across the lifespan in Aotearoa/New Zealand: A population-level study. Journal of Epidemiology & Community Health, 77, 571-577. doi: 10.1136/jech-2023-220337

Whitehead, J., Davie, G., de Graaf, B., Crengle, S., Lawrenson, R., Miller, R., & Nixon, G. (2023). Unmasking hidden disparities: A comparative observational study examining the impact of different rurality classifications for health research in Aotearoa New Zealand. BMJ Open, 13, e067927. doi: 10.1136/bmjopen-2022-067927

Conference Contribution - Published proceedings: Abstract

Miller, R., Davie, G., De Graaf, B., Crengle, S., & Nixon, G. (2023). Avoiding double counting: The effect of bundling hospital events in administrative datasets for the interpretation of rural-urban differences in Aotearoa New Zealand. Proceedings of the New Zealand Biostatistics Conference. Retrieved from https://events.otago.ac.nz/2023-biostatistics-conference

2022

Journal - Research Article

Crengle, S., Davie, G., Whitehead, J., de Graaf, B., Lawrenson, R., & Nixon, G. (2022). Mortality outcomes and inequities experienced by rural Māori in Aotearoa New Zealand. Lancet Regional Health: Western Pacific, 28, 100570. doi: 10.1016/j.lanwpc.2022.100570

Whitehead, J., Davie, G., de Graaf, B., Crengle, S., Fearnley, D., Smith, M., Lawrenson, R., & Nixon, G. (2022). Defining rural in Aotearoa New Zealand: A novel geographic classification for health purposes. New Zealand Medical Journal, 135(1559), 24-40. Retrieved from https://journal.nzma.org.nz

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 Other

Davie, G., Lilley, R., de Graaf, B., Dicker, B., Branas, C., Ameratunga, S., … Kool, B. (2022). Access to advanced-level hospital care: Differences in prehospital times calculated using incident locations compared with patients' usual residence [Brief report]. Injury Prevention, 28, 192-196. doi: 10.1136/injuryprev-2021-044351

Conference Contribution - Published proceedings: Abstract

Davie, G., Lilley, R., de Graaf, B., Ameratunga, S., Dicker, B., Civil, I., … Kool, B. (2022). Access to specialist care and injury survivability: A study of prehospital fatalities. Injury Prevention, 28(Suppl. 2), (pp. A56). doi: 10.1136/injuryprev-2022-safety2022.166

Kool, B., Davie, G., de Graaf, B., Reid, P., Branas, C., Civil, I., … Ameratunga, S. (2022). Potential survivability of prehistory injury deaths in New Zealand. Injury Prevention, 28(Suppl. 2), (pp. A54). doi: 10.1136/injuryprev-2022-safety2022.161

2021

Journal - Research Article

de Graaf, B., Lilley, R., Davie, G., & Kool, B. (2021). Optimising base locations for New Zealand's Helicopter Emergency Medical Services. Spatial & Spatio-temporal Epidemiology, 38, 100435. doi: 10.1016/j.sste.2021.100435

Davie, G., Lilley, R., de Graaf, B., Ameratunga, S., Dicker, B., Civil, I., … Kool, B. (2021). Access to specialist hospital care and injury survivability: identifying opportunities through an observational study of prehospital trauma fatalities. Injury, 51, 2863-2870. doi: 10.1016/j.injury.2021.03.033

Lilley, R., Kool, B., Davie, G., de Graaf, B., & Dicker, B. (2021). Opportunities to prevent fatalities due to injury: A cross-sectional comparison of prehospital and in-hospital fatal injury deaths in New Zealand. Australian & New Zealand Journal of Public Health, 45(3), 235-241. doi: 10.1111/1753-6405.13068

Lilley, R., McNoe, B., Davie, G., de Graaf, B., & Driscoll, T. (2021). Work-related fatalities involving children in New Zealand, 1999-2014. Children, 8, 4. doi: 10.3390/children8010004

Kool, B., Lilley, R., Davie, G., de Graaf, B., Reid, P., Branas, C., … Ameratunga, S. N. (2021). Potential survivability of prehospital injury deaths in New Zealand: A cross-sectional study. Injury Prevention, 27, 245-250. doi: 10.1136/injuryprev-2019-043408

Journal - Research Other

Nixon, G., Whitehead, J., Davie, G., Fearnley, D., Crengle, S., de Graaf, B., Smith, M., … Lawrenson, R. (2021). Developing the geographic classification for health, a rural-urban classification for New Zealand health research and policy: A research protocol. Australian Journal of Rural Health, 29(6), 940-947. doi: 10.1111/ajr.12778

Kool, B., Lilley, R., Davie, G., Reid, P., Civil, I., Branas, C., de Graaf, B., … Ameratunga, S. N. (2021). Evaluating the impact of prehospital care on mortality following major trauma in New Zealand: A retrospective cohort study. Injury Prevention, 27, 582-586. doi: 10.1136/injuryprev-2020-044057

Working Paper; Discussion Paper; Technical Report

Whitehead, J., Davie, G., de Graaf, B., Crengle, S., Smith, M., Lawrenson, R., Fearnley, D., Farrell, N., & Nixon, G. (2021). The geographic classification for health: Methodology and classification report. (pp. 1-35). Dunedin, New Zealand: University of Otago. Retrieved from https://blogs.otago.ac.nz/rural-urbannz/

2020

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

2019

Journal - Research Article

Lilley, R., de Graaf, B., Kool, B., Davie, G., Reid, P. J., Dicker, B., … Branas, C. (2019). Geographical and population disparities in timely access to prehospital and advanced level emergency care in New Zealand: A cross-sectional study. BMJ Open, 9(7), e026026. doi: 10.1136/bmjopen-2018-026026

Conference Contribution - Published proceedings: Abstract

Lilley, R., McNoe, B., Davie, G., de Graaf, B., Horsburgh, S., Maclennan, B., & Driscoll, T. (2019). Creating safer workplaces: Learning from work-related fatal injury in New Zealand. Occupational & Environmental Medicine, 76(Suppl. 1), (pp. A61). doi: 10.1136/OEM-2019-EPI.165

2018

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 Other

Cryer, C., Davie, G. S., Gulliver, P. J., Th Petridou, E., Dessypris, N., Lauritsen, J., … de Graaf, B. (2018). Empirical validation of the New Zealand serious non-fatal injury outcome indicator for 'all injury' [Brief report]. Injury Prevention, 24(4), 300-304. doi: 10.1136/injuryprev-2017-042463

Lilley, R., Kool, B., Davie, G., de Graaf, B., Ameratunga, S. N., Reid, P., … Branas, C. C. (2018). Preventable injury deaths: Identifying opportunities to improve timeliness and reach of emergency healthcare services in New Zealand. Injury Prevention, 24(5), 384-389. doi: 10.1136/injuryprev-2016-042304

Conference Contribution - Published proceedings: Abstract

Lilley, R., de Graaf, B., Kool, B., Davie, G., Ameratunga, S., Reid, P., … Branas, C. (2018). Geospatial examination of access to advanced hospital services in New Zealand. Proceedings of the Australasian Epidemiological Association (AEA) 31st Annual Scientific Meeting. 47. Retrieved from https://aea.asn.au

Lilley, R., Kool, B., Davie, G., de Graaf, B., Ameratunga, S., Reid, P., … Branas, C. (2018). Identifying prehospital fatal injuries in New Zealand using data linkage. Proceedings of the Australasian Epidemiological Association (AEA) 31st Annual Scientific Meeting. 11. Retrieved from https://aea.asn.au

Lilley, R., Kool, B., de Graaf, B., Davie, G., Ameratunga, S., Reid, P., … Branas, C. (2018). A geospatial examination of access to advanced trauma services in New Zealand: Identifying opportunities to improve survival following serious injury. Injury Prevention, 24(Suppl. 2), (pp. A249). doi: 10.1136/injuryprevention-2018-safety.689

Lilley, R., Kool, B., de Graaf, B., Davie, G., Ameratunga, S., Reid, P., … Branas, C. (2018). An epidemiological analysis of prehospital fatal injuries in New Zealand: Identifying opportunities for prevention. Injury Prevention, 24(Suppl. 2), (pp. A251). doi: 10.1136/injuryprevention-2018-safety.694

2017

Journal - Research Article

Cryer, C., Miller, T. R., Lyons, R. A., Macpherson, A. K., Pérez, K., Petridou, E. T., … Davie, G. S., … de Graaf, B., & Steiner, C. A. (2017). Towards valid 'serious non-fatal injury' indicators for international comparisons based on probability of admission estimates. Injury Prevention, 23(1), 47-57. doi: 10.1136/injuryprev-2016-042020

2016

Journal - Research Article

Whigham, P. A., de Graaf, B., Srivastava, R., & Glue, P. (2016). Managing distance and covariate information with point-based clustering. BMC Medical Research Methodology, 16(1), 115. doi: 10.1186/s12874-016-0218-z

2015

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

2014

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

Conference Contribution - Published proceedings: Abstract

Davie, G., Derrett, S., & de Graaf, B. (2014). Enriching interview data with administrative health data and area-based measures available on the web: "Prospective Outcomes of Injury Study" example. Australasian Epidemiologist, 21(3), (pp. 82). [Abstract]

2011

Commissioned Report for External Body

Cryer, C., Gulliver, P., Davie, G., de Graaf, B., Langley, J., Boufous, S., … Steiner, C. A. (2011). Empirical validation of the New Zealand Injury Prevention Strategy indicators: The identification of ICD diagnoses associated with a high probability of inpatient hospital admission [Injury Prevention Research Unit, University of Otago: OR086]. Commissioned by Accident Compensation Corporation. Dunedin, New Zealand: Injury Prevention Research Unit, University of Otago. 130p.

Working Paper; Discussion Paper; Technical Report

Evans, J., Weiss, H., & de Graaf, B. (2011). Characteristics of at fault drivers and bicyclists involved in bicyclist motor vehicle collisions New Zealand 2002-2009. Dunedin, New Zealand: Injury Prevention Research Unit, University of Otago. 15p.

2010

Journal - Research Article

Kypri, K., McCambridge, J., Cunningham, J. A., Vater, T., Bowe, S., De Graaf, B., … Dean, J. (2010). Web-based alcohol screening and brief intervention for Māaori and non-Māori: The New Zealand e-SBINZ trials. BMC Public Health, 10, 781. doi: 10.1186/1471-2458-10-781

Conference Contribution - Published proceedings: Abstract

Cryer, C., Gulliver, P., de Graaf, B., Davie, G., & Langley, J. (2010). Identifying injury diagnoses associated with a high probability of admission. Injury Prevention. 16(Suppl. 1), (pp. A141). doi: 10.1136/ip.2010.029215.506