Dr Ella Iosua

2026

Journal - Research Article

Yap, J. M., Wall, C. L., Meredith-Jones, K., Iosua, E., Osborne, H., & Schultz, M. (2026). A randomised controlled trial comparing the effects of personalised diet and physical activity intervention versus usual care on cardiometabolic risk factors in adults with inactive inflammatory bowel disease. Nutrients, 18(5), 785. doi: 10.3390/nu18050785

Journal - Research Other

McNoe, B., Gray, A., Iosua, E., Neumann, R., & Dodd, A. (2026). High sunburn rates in Aotearoa: We need more investment in skin cancer prevention. The Briefing, (20 January). Retrieved from https://www.phcc.org.nz/briefing/high-sunburn-rates-aotearoa-we-need-more-investment-skin-cancer-prevention

Conference Contribution - Published proceedings: Abstract

Campbell, K., Peddie, M., Iosua, E., & Reynolds, A. (2026). GluCoast: A randomised crossover trial of dietary strategies for glucose control in type 2 diabetes. Proceedings of the New Zealand Society for the Study of Diabetes (NZSSD) Annual Scientific Meeting. (pp. 37). Retrieved from https://www.nzssd.org.nz/

2025

Journal - Research Article

Yap, J. M., Wall, C. L., Meredith-Jones, K. A., Iosua, E., Osborne, H., & Schultz, M. (2025). Inflammatory bowel disease exercise and diet (IBDeat) Study: Lifestyle-associated CVD risk factors among individuals with IBD in New Zealand. Crohn's & Colitis 360, 7(3), otaf046. doi: 10.1093/crocol/otaf046

Yap, J. M., Wall, C. L., Meredith-Jones, K., Iosua, E., Osborne, H., & Schultz, M. (2025). Dietary and physical activity habits of adults with inflammatory bowel disease in Aotearoa, New Zealand: A cross-sectional study. Nutrition & Dietetics, 82(4), 412-422. doi: 10.1111/1747-0080.70011

Conference Contribution - Published proceedings: Abstract

Yap, J., Wall, C. L., Meredith-Jones, K., Iosua, E., Osborne, H., & Schultz, M. (2025). Inflammatory Bowel Disease Lifestyle Food and Exercise (IBDLiFE) study: A randomized controlled trial to investigate the effectiveness of a personalised diet and physical activity intervention for adults with inactive IBD in Aotearoa, New Zealand. Journal of Crohn's & Colitis, 19(Suppl. 1), (pp. i1419). doi: 10.1093/ecco-jcc/jjae190.0145

Other Research Output

Gray, A., Iosua, E., & Widyastutim, N. (2025, October). How to collaborate with a biostatistician from the Biostatistics Centre. Department of Medicine Seminar, University of Otago, Dunedin, New Zealand. [Department Seminar].

2024

Journal - Research Article

McAnally, H. M., Iosua, E., Belsky, J., Sligo, J. L., Letcher, P., Greenwood, C. J., … Hancox, R. J. (2024). Does adolescent academic achievement predict future parenting? Infant & Child Development, 33(3), e2483. doi: 10.1002/icd.2483

Marsh, L., Doscher, C., Iosua, E., Quigg, R., & Tomintz, M. (2024). What impact would tobacco retailer proximity limit have on tobacco availability in New Zealand? Tobacco Control, 33, 215-220. doi: 10.1136/tc-2022-057462

2023

Journal - Research Article

Marsh, L., Iosua, E., Parkinson, L., Doscher, C., & Quigg, R. (2023). Is the neighbourhood context important for a tobacco retailer proximity policy? Health & Place, 82, 103032. doi: 10.1016/j.healthplace.2023.103032

Parker, S., Midgley, D. J., Iosua, E., Galletly, A., Durran, A., Lau, G., … Letts, J. (2023). Catheter-directed thrombolysis for lower limb ischaemia: A retrospective study of treatment outcomes. Journal of Medical Imaging & Radiation Oncology, 67, 421-427. doi: 10.1111/1754-9485.13496

Letcher, P., Greenwood, C. J., McAnally, H., Belsky, J., Macdonald, J. A., Spry, E. A., … Sligo, J., … Iosua, E., … Hancox, R. J., & Olsson, C. A. (2023). Parental history of positive development and child behavior in next generation offspring: A two-cohort prospective intergenerational study. Child Development, 94, 60-73. doi: 10.1111/cdev.13839

McAllister, S., Iosua, E., Hollingshead, B., Bruning, J., Fisher, M., Olin, R., … de Gouw, A., & Priest, P. (2023). Quality of life in people living with HIV in Aotearoa New Zealand: An exploratory cross-sectional study. AIDS Care, 35(10), 1518-1525. doi: 10.1080/09540121.2022.2082359

Journal - Research Other

Reynolds, A. N., Hood, F., Wilson, R., Ross, A., Neumann, S., Turner, R., Iosua, E., Katare, R., Shahin, A., Kok, Z.-y., … Coffey, S., & Mann, J. (2023). Healthy grocery delivery in the usual care for adults recovering from an acute coronary event: protocol for a three-arm randomised controlled trial. BMJ Open, 13, e074278. doi: 10.1136/bmjopen-2023-074278

Conference Contribution - Published proceedings: Abstract

Yap, J., Wall, C., Meredith-Jones, K., Iosua, E., Osborne, H., & Schultz, M. (2023). Inflammatory bowel disease exercise and diet habits (IBDeat) study: Chronic metabolic disease risk factors among IBD patients in New Zealand. Journal of Crohn's & Colitis, 17(Suppl. 1), (pp. i615-i616). doi: 10.1093/ecco-jcc/jjac190.0614

Conference Contribution - Verbal presentation and other Conference outputs

Ruhe, T., Kokaua, J., Bowden, N., Iosua, E., & Richards, R. (2023, July). Lighted and connected pathways: Identifying the specific Pacific ethnicities of a Pacific birth cohort in Aotearoa New Zealand’s Integrated Data Infrastructure (IDI). Verbal presentation at the 5th Pacific Islands Universities Research Network (PIURN) Conference, Rarotonga, Cook Islands.

2022

Journal - Research Article

McNoe, B. M., Morgaine, K. C., Reeder, A. I., & Iosua, E. (2022). A photoaging intervention delivered to adolescents in secondary schools: A feasibility study. Journal of Skin Cancer, 2022, 9434176. doi: 10.1155/2022/9434176

Heath, L., Egan, R., Iosua, E., Walker, R., Ross, J., & MacLeod, R. (2022). Palliative and end of life care in undergraduate medical education: A survey of New Zealand medical schools. BMC Medical Education, 22(1), 530. doi: 10.1186/s12909-022-03593-3

Marsh, L., Iosua, E., Quigg, R., Brillinger, J., Venter, N., & Wood, S. (2022). Could we see the end of tobacco being sold in bars and pubs in New Zealand? Nicotine & Tobacco Research, 24, 1669-1677. doi: 10.1093/ntr/ntac094

Journal - Research Other

Skegg, D. C. G., Brewerton, M., Hill, P. C., Iosua, E., Murdoch, D. R., & Turner, N. (2022). Vaccine mandates in the time of Omicron. New Zealand Medical Journal, 135(1552), 11-15. Retrieved from https://journal.nzma.org.nz/

Conference Contribution - Published proceedings: Full paper

McKelvie-Sebileau, P., Baddock, S., Iosua, E., Smith, L., Wu, L., Andersen, P., … Leonard, G., … Tipene-Leach, D. (2022). A longitudinal study exploring resilience and wellbeing of staff from five institutions across Te Pūkenga network during the 2020 Covid-19 lockdown and subsequent lifting of social restrictions. In E. Papoutsaki & M. Shannon (Eds.), Proceedings of the 2021 Institutes of Technology and Polytechnics (ITP) Research Symposium. (pp. 135-152). Auckland, New Zealand: ePress. doi: 10.34074/proc.2205011

Conference Contribution - Published proceedings: Abstract

Marsh, L., Doscher, C., Iosua, E., Quigg, R., & Tomintz, M. (2022). What impact does a tobacco retailer proximity limit have on tobacco availability in New Zealand? Proceedings of the Society for Research on Nicotine & Tobacco (SRNT) 28th Annual Meeting. (pp. 212). Retrieved from https://www.srnt.org

Conference Contribution - Verbal presentation and other Conference outputs

Symon, V., Nada-Raja, S., Sopoaga, F., Sopoaga, L., Norris, P., Ruhe, T., Kokaua, J., Richards, R., … Isno, L., George, M., Iosua, E., & Keown, S. (2022, November). The show must go on: Research in a time of COVID. Verbal presentation at the COVID-19’s Impact on Teaching and Learning at the University of Otago: Lessons Learned Symposium, Dunedin, New Zealand.

Yap, J., Wall, C., Meredith-Jones, K., Osborne, H., Iosua, E., & Schultz, M. (2022, September). New Zealand adults with inflammatory bowel disease exercise and diet (IBDeat) habits. Verbal presentation at the Postgraduate & Early Career Researchers Committee (PERC) & Division of Health Sciences Early & Mid-Career Researcher (EMCR) Joint Research Symposium, Dunedin, New Zealand.

2021

Journal - Research Article

Buxton, L. S., Reeder, A. I., Marsh, L., Iosua, E., & McNoe, B. M. (2021). Erythemal ultraviolet radiation exposure of high school rowers in Aotearoa/New Zealand. Journal of Photochemistry & Photobiology B, 222, 112254. doi: 10.1016/j.jphotobiol.2021.112254

Nie, L., Smith-Han, K., Iosua, E., & Walker, S. (2021). New Zealand medical students’ views of euthanasia/assisted dying across different year levels. BMC Medical Education, 21, 125. doi: 10.1186/s12909-021-02558-2

Heath, L., Egan, R., Ross, J., Iosua, E., Walker, R., & MacLeod, R. (2021). Preparing nurses for palliative and end of life care: A survey of New Zealand nursing schools. Nurse Education Today, 100, 104822. doi: 10.1016/j.nedt.2021.104822

McAnally, H. M., Iosua, E., Sligo, J. L., Belsky, J., Spry, E., Letcher, P., … Williams, S., McGee, R., Bolton, A. E., & Hancox, R. J. (2021). Childhood disadvantage and adolescent socioemotional wellbeing as predictors of future parenting behaviour. Journal of Adolescence, 86, 90-100. doi: 10.1016/j.adolescence.2020.12.005

2020

Journal - Research Article

Heath, L., Egan, R., Ross, J., Iosua, E., Walker, R., & MacLeod, R. (2020). Teaching palliative care skills. Kai Tiaki Nursing New Zealand, 26(10), 16-17.

Reeder, A. I., Iosua, E. E., McNoe, B., & Petersen, A.-C. L. (2020). SunSmart accreditation and use of a professional policy drafting service: Both positively and independently associated with high sun protective hat scores derived from primary school policies. Journal of Skin Cancer, 2020, 9695080. doi: 10.1155/2020/9695080

Journal - Research Other

Olsson, C. A., Spry, E., Letcher, P., McAnally, H., Thomson, K., Macdonald, J., … Iosua, E., Sligo, J., … McGee, R., … Hancox, R. J., & Patton, G. C. (2020). The Australian and New Zealand Intergenerational Cohort Consortium: A study protocol for investigating mental health and well-being across generations. Longitudinal & Life Course Studies, 11(2), 267-281. doi: 10.1332/175795920x15792720930280

Conference Contribution - Published proceedings: Abstract

Disher, N., Robertson, T., Duncan, S., Grainger, S., Ahn, K., Hay, C., … Iosua, E., Hancox, B., & Coffey, S. (2020). Exercise stress echocardiography as predictor for major cardiac events: A single centre retrospective study. Heart, Lung & Circulation, 29(Suppl. 1), (pp. S26-S27). doi: 10.1016/j.hlc.2020.05.066

Other Research Output

Walker, S., Nie, L., Smith-Han, K. & Iosua, E. (2020, August). Medical education seems to make students less likely to support euthanasia/assisted dying: What does this mean and how might it matter? Bioethics Centre, University of Otago, Dunedin, New Zealand. [Department Seminar].

2018

Journal - Research Article

Richards, R., McNoe, B., Iosua, E., Reeder, A., Egan, R., Marsh, L., Robertson, L., Maclennan, B., Dawson, A., Quigg, R., & Petersen, A.-C. (2018). Cancer information seeking among adult New Zealanders: A national cross-sectional study. Journal of Cancer Education, 33(3), 610-614. doi: 10.1007/s13187-016-1136-9

Conference Contribution - Published proceedings: Abstract

Turner, R., Cameron, C., Iosua, E., & Samaranayaka, A. (2018). Establishing a Biostatistics Unit at the University of Otago. Proceedings of the Australasian Applied Statistics (AASC) Conference. (pp. 10). Retrieved from https://www.aasc.nz/

2017

Journal - Research Article

Richards, R., McNoe, B., Iosua, E., Reeder, A. I., Egan, R., Marsh, L., Robertson, L., Maclennan, B., Latu, A. T. F., Quigg, R., & Petersen, A.-C. (2017). Cancer mortality, early detection and treatment among adult New Zealanders: Changes in perceptions between 2001 and 2014/5. Asian Pacific Journal of Cancer Prevention, 18(12), 3401-3406. doi: 10.22034/APJCP.2017.18.12.3401

Cameron, C., Iosua, E., Parry, M., Richards, R., & Jaye, C. (2017). More than just numbers: Challenges for professional statisticians. Statistics Education Research Journal, 16(2), 362-375. Retrieved from http://iase-web.org/Publications.php?p=SERJ

Richards, R., McNoe, B., Iosua, E., Reeder, A. I., Egan, R., Marsh, L., Robertson, L., Maclennan, B., Latu, A. T. F., Quigg, R., & Petersen, A.-C. (2017). Knowledge of evidence-based cancer risk factors remains low among New Zealand adults: Findings from two cross-sectional studies, 2001 and 2015. Asian Pacific Journal of Cancer Prevention, 18(11), 2931-2936. doi: 10.22034/apjcp.2017.18.11.2931

Anitelea, T., Iosua, E., Ebramjee, A., & Gwynne-Jones, D. (2017). The outcomes of patients returned to general practitioner after being declined hip and knee replacement. New Zealand Medical Journal, 130(1464), 25-32. Retrieved from https://www.nzma.org.nz/journal

Marsh, L., Iosua, E., McGee, R., & White, J. (2017). New Zealand adolescents' discouragement of smoking among their peers. Australian & New Zealand Journal of Public Health, 41(5), 497-501. doi: 10.1111/1753-6405.12698

Richards, R., McNoe, B., Iosua, E., Reeder, A. I., Egan, R., Marsh, L., Robertson, L., Maclennan, B., Dawson, A., Quigg, R., & Petersen, A.-C. (2017). Changes in awareness of cancer risk factors among adult New Zealanders (CAANZ): 2001 to 2015. Health Education Research, 32(2), 153-162. doi: 10.1093/her/cyx036

Gwynne-Jones, D. P., Lash, H. W. R., James, A. W., Iosua, E. E., & Matheson, J. A. (2017). The Morscher Press Fit Acetabular component: An independent long term review at 18 -22 years. Journal of Arthroplasty, 32(8), 2444-2449. doi: 10.1016/j.arth.2017.02.052

Taylor, R. W., Iosua, E., Heath, A.-L. M., Gray, A. R., Taylor, B. J., Lawrence, J. A., Hanna, M., Cameron, S. L., Sayers, R., & Galland, B. (2017). Eating frequency in relation to BMI in very young children: A longitudinal analysis. Public Health Nutrition, 20(8), 1372-1379. doi: 10.1017/S1368980017000143

Baddock, S. A., Tipene-Leach, D., Williams, S. M., Tangiora, A., Jones, R., Iosua, E., Macleod, E. C., & Taylor, B. J. (2017). Wahakura versus bassinet for safe infant sleep: A randomized trial. Pediatrics, 139(2), e20160162. doi: 10.1542/peds.2016-0162

Richards, R., McNoe, B., Iosua, E., Reeder, A., Egan, R., Marsh, L., Robertson, L., Maclennan, B., Dawson, A., Quigg, R., & Petersen, A.-C. (2017). Cancer Awareness in Aotearoa New Zealand (CAANZ), 2001 and 2015: Study protocols. Journal of Cancer Education, 32(4), 745-748. doi: 10.1007/s13187-016-1050-1

Conference Contribution - Published proceedings: Abstract

Marsh, L., Iosua, E., McGee, R., & White, J. (2017). New Zealand adolescents’ discouragement of smoking among their peers. Proceedings of the 13th Behavioural Research in Cancer Control (BRCC) Conference: Inform, Inspire, Impact. (pp. 68). Retrieved from http://www.cancervic.org.au/brcc2017

Conference Contribution - Verbal presentation and other Conference outputs

Anitelea, T., Ebramjee, A., Iosua, E., & Gwynne-Jones, D. (2017, October). The outcomes of patients returned to general practitioner after being declined hip and knee replacement. Verbal presentation at the New Zealand Orthopaedic Association (NZOA) Annual Scientific Meeting, Auckland, New Zealand.

Working Paper; Discussion Paper; Technical Report

Richards, R., McNoe, B., Iosua, E., Reeder, A., Egan, R., Marsh, L., Robertson, L., Maclennan, B., Latu, A. T. F., Quigg, R., Petersen, A.-C., & Fruean, K. (2017). What helps a person get through a cancer diagnosis: Findings from a cross sectional survey of NZ adults: A technical report. Cancer Society of New Zealand. Cancer Society Social & Behavioural Research Unit, Department of Preventive and Social Medicine, University of Otago. 4p. Retrieved from http://www.otago.ac.nz/sbru/publications/otago088869.html

2016

Journal - Research Article

Gwynne-Jones, D., & Iosua, E. (2016). Rationing of hip and knee replacement: Effect on the severity of patient-reported symptoms and the demand for surgery in Otago. New Zealand Medical Journal, 129(1432), 59-66. Retrieved from https://www.nzma.org.nz/journal

Reeder, A. I., McNoe, B. M., & Iosua, E. E. (2016). Sun protection practices in New Zealand secondary schools: A 2014 baseline study. Preventive Medicine Reports, 3, 257-263. doi: 10.1016/j.pmedr.2016.03.001

Gwynne-Jones, D. P., Iosua, E. E., & Stout, K. M. (2016). Rationing for total hip and knee arthroplasty using the New Zealand Orthopaedic Association score: Effectiveness and comparison with patient-reported scores. Journal of Arthroplasty, 31(5), 957-962. doi: 10.1016/j.arth.2015.11.022

Robertson, L., Iosua, E., McGee, R., & Hancox, R. J. (2016). Non-daily, low-rate daily, and high-rate daily smoking in young adults: A 17 year follow-up. Nicotine & Tobacco Research, 18(5), 943-949. doi: 10.1093/ntr/ntv167

Conference Contribution - Published proceedings: Abstract

Marsh, L., Iosua, E., McGee, R., & White, J. (2016). New Zealand adolescents' discouragement of smoking among their peers. Proceedings of the 22nd Society for Research on Nicotine and Tobacco (SRNT) Annual Meeting. (pp. 164). Retrieved from http://www.srnt.org/?page=AnnualMtg

Working Paper; Discussion Paper; Technical Report

Sneyd, M. J., Iosua, E., & Cameron, C. (2016). A New Zealand risk predictor model for breast cancer: Report for the New Zealand Breast Cancer Foundation. (pp. 1-23). [Technical/Scientific Report].

Richards, R., McNoe, B., Iosua, E., Reeder, A., Egan, R., Marsh, L., Robertson, L., Maclennan, B., Tiatia Fa'atoese Latu, A., Quigg, R., & Petersen, A.-C. (2016). NZ adults' awareness of the Cancer Society of New Zealand services: A technical report. Dunedin, New Zealand: University of Otago. 5p.

2015

Conference Contribution - Published proceedings: Abstract

Baddock, S., Tipene-Leach, D., Williams, S., Tangiora, A., Jones, R., Iosua, E., & Taylor, B. (2015). Physiological measures from a randomized controlled trial to investigate infant sleep risks and benefits when using a culturally-derived sleep device (Wahakura) compared to a standard bassinet. Sleep & Biological Rhythms, 13(Suppl. 1), (pp. 8). doi: 10.1111/sbr.12132

Richards, R., McNoe, B., Iosua, E., Reeder, A. I., Egan, R., Dawson, A., Robertson, L., Marsh, L., Maclennan, B., Petersen, A.-C., Quigg, R., & Cameron, C. (2015). Cancer awareness: Are we on the right track? Proceedings of the Cancer Society Social and Behavioural Research Unit (SBRU) Symposium: Reducing the Impact of Cancer. Retrieved from https://otago-southland.cancernz.org.nz/en/?divisionId=20

Robertson, L., McGee, R., Iosua, E., & Hancox, R. (2015). Non-daily, low-rate daily and high-rate daily smoking in young adults: A 17 year follow-up. Proceedings of the 12th Behavioural Research in Cancer Control (BRCC) Conference: 'Bridging the Gap' between research evidence, and practice and policy. (pp. 87). Retrieved from http://www.cancercouncil.com.au/BRCC2015/

Reeder, A., McNoe, B., & Iosua, E. (2015). New Zealand secondary schools' sun protection policies and practices: A 2014 baseline to inform advocacy and programme development. Proceedings of the 12th Behavioural Research in Cancer Control (BRCC) Conference: 'Bridging the Gap' between research evidence, and practice and policy. (pp. 72). Retrieved from http://www.cancercouncil.com.au/BRCC2015/

Conference Contribution - Poster Presentation (not in published proceedings)

Gwynne-Jones, D., Iosua, E., & Stout, K. (2015, October). Rationing for total hip and knee replacement: Implementation and outcomes of nurse priorization. Poster session presented at the New Zealand Orthopaedic Association (NZOA) Annual Scientific Meeting, Wellington, New Zealand.

Conference Contribution - Verbal presentation and other Conference outputs

Reeder, T., McNoe, B., & Iosua, E. (2015, November). Skin cancer primary prevention in NZ Secondary Schools Survey 2014: Preliminary findings. Workshop presentation at the New Zealand Melanoma Summit, Auckland, New Zealand.

2014

Journal - Research Article

Reeder, A. I., Iosua, E., Gray, A. R., & Hammond, V. A. (2014). Validity and reliability of the Munsell soil color charts for assessing human skin color. Cancer Epidemiology, Biomarkers & Prevention, 23(10), 2041-2047. doi: 10.1158/1055-9965.epi-14-0269

Iosua, E. E., Gray, A. R., McGee, R., Landhuis, C. E., Keane, R., & Hancox, R. J. (2014). Employment among schoolchildren and its associations with adult substance use, psychological well-being, and academic achievement. Journal of Adolescent Health, 55(4), 542-548. doi: 10.1016/j.jadohealth.2014.03.018

Conference Contribution - Published proceedings: Abstract

McGee, R., Iosua, E., Marsh, L., & Cameron, C. (2014). Idle youth by all things enslaved: Media, consumerism and tobacco. Australasian Epidemiologist, 21(3), (pp. 52). [Abstract]

2013

Awarded Doctoral Degree

Iosua, E. E. (2013). Employment among schoolchildren and its associations with adult substance use and psychological wellbeing (PhD). University of Otago, Dunedin, New Zealand. Retrieved from http://hdl.handle.net/10523/3936

2012

Conference Contribution - Published proceedings: Abstract

Iosua, E. (2012). Employment among schoolchildren and its associations with subsequent adult substance use and psychological wellbeing. In C. Matthewson, M. Taumoepeau, G. Burnett & I. Iati (Eds.), Proceedings of the Pacific Postgraduate Symposium: Pacific Voices IX. (pp. 27). Dunedin, New Zealand: Pacific Islands Centre, University of Otago. [Abstract]

2010

Conference Contribution - Published proceedings: Abstract

Iosua, E. (2010). Is part-time employment of children and adolescents a risk factor for subsequent tobacco, alcohol and cannabis consumption? In M. Taumoepeau, C. Matthewson, G. Burnett & P. Vakaoti (Eds.), Proceedings of the Pacific Postgraduate Symposium: Pacific Voices VII. (pp. 29). Dunedin, New Zealand: Pacific Islands Centre, University of Otago. [Abstract]