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ORIGINAL ARTICLE |
1 Division of Community Health, University of Auckland, New Zealand
2 Institute for International Health, University of Sydney, Australia
3 Clinical Trials Service Unit, University of Oxford, UK
4 Injury Prevention Research Centre, University of Auckland, New Zealand
5 Injury Prevention Research Unit, University of Otago, New Zealand
6 Clinical Trials Research Unit, University of Auckland, New Zealand
7 Department of Molecular Medicine, University of Auckland, New Zealand
Correspondence to:
Dr Shanthi N Ameratunga, Division of Community Health, Faculty of Medicine and Health Sciences, University of Auckland, Private Bag 92019, Auckland, New Zealand;
s.ameratunga{at}auckland.ac.nz
Introduction: Cohort studies have contributed important scientific knowledge regarding the determinants of chronic diseases. Despite the need for etiologic investigations, this design has been infrequently used in injury prevention research.
Objectives: To describe the baseline findings of the New Zealand Blood Donors' Health Study, a large prospective study designed to investigate relationships between lifestyle, psychosocial factors, and serious injury due to road crashes, falls, self harm, assault, work, sport, and recreation.
Methods: Participants were recruited from fixed and mobile collection sites of a voluntary non-profit blood donor program. Baseline exposure data (for example risk taking behaviors, alcohol and marijuana use, sleep habits, and depression) were collected using a self administered questionnaire. Outcome data regarding serious injury will be collected prospectively through computerized record linkage of participants' unique identifiers to national morbidity and mortality databases.
Results: In total, 22 389 participants enrolled in the study (81% response rate). The diverse study population included 36% aged 16–24 years, 20% rural residents, and large variability in exposures of interest. For example, in the 12 months before recruitment, 21% had driven a motor vehicle when they considered themselves over the legal limit for alcohol, and 11% had been convicted of traffic violations (excluding parking infringements). Twelve per cent had seriously considered attempting suicide sometime in their life.
Conclusions: This is the first, large scale cohort study investigating determinants of serious injury in New Zealand and among the largest worldwide. Preliminary findings from prospective analyses that can inform injury prevention policy are expected within five years.
Keywords: New Zealand Blood Donors' Health Study; cohort studies; epidemiology; youth; traffic injury; risk factors; blood donors
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