Sampling and recruitment methodology for a national eye health survey of Indigenous Australians

Abstract

Objective: To review the process of sample selection and highlight the methodological difficulties encountered during a nationwide survey of Indigenous Australians, to determine the prevalence and causes of vision impairment and evaluate access to and utilisation of eye care services. Methods: Using a multi-stage, random cluster sampling methodology, 30 geographic areas stratifed by remoteness, were selected to provide a representative population of approximately 3,000 Indigenous Australians aged 5-15 and 40 years and older, and a small non-Indigenous sample in selected remote areas. Recruitment was adapted to local conditions. The rapid assessment methodology included a questionnaire, tests..