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A comparison of participants with non-participants in a population-based epidemiologic study: the Melbourne Visual Impairment Project

Livingston, P.M., Lee, S.E., McCarty, C.A. and Taylor, H.R. 1997, A comparison of participants with non-participants in a population-based epidemiologic study: the Melbourne Visual Impairment Project, Ophthalmic epidemiology, vol. 4, no. 2, pp. 73-81, doi: 10.3109/09286589709057099.

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Title A comparison of participants with non-participants in a population-based epidemiologic study: the Melbourne Visual Impairment Project
Author(s) Livingston, P.M.
Lee, S.E.
McCarty, C.A.
Taylor, H.R.
Journal name Ophthalmic epidemiology
Volume number 4
Issue number 2
Start page 73
End page 81
Total pages 9
Publisher Taylor & Francis
Place of publication London, Eng.
Publication date 1997
ISSN 0928-6586
Keyword(s) Adult
Aged
Aged, 80 and over
Australia
Bias (epidemiology)
Data Interpretation, Statistical
Female
Humans
Incidence
Life Style
Male
Middle Aged
Patient Participation
Prevalence
Retrospective Studies
Social Class
Vision Disorders
Summary PURPOSE: Adequate participation in population-based studies in essential to ensure that the sample is representative of the population under investigation. Participants may differ from non-participants on important variables such as age, sex socioeconomic status, and general health factors. The Melbourne Visual Impairment Project (Melbourne VIP) is a population-based study designed to increase understanding of the prevalence and severity of common ocular disorders affecting people 40 years of age and over. AIM: The aim of this study was to determine the potential for any non-response bias by comparing data from participants and non-participants of the Melbourne VIP. METHODS: Specific demographic and general variables were compared between the two groups. The variables included age, sex, education level, and social status. The reason for non-attendance was also recorded. RESULTS: A total of 3271 (83%) eligible residents from the 9 sample areas were screened; 46% males and 54% females. Language spoken at home was significantly associated with participation. Residents whose main language at home was not English were less likely to attend the screening centre. (OR: 0.60; CI: 0.44-0.81). The main reasons given for non-attendance by eligible residents were lack of interest (6%), too busy to attend (4%), personal illness (2%), and attend own eye specialist (2%). CONCLUSION: We believe these results will not impact significantly on the interpretation of gender and age-specific data from the Melbourne VIP.
Language eng
DOI 10.3109/09286589709057099
Field of Research 1103 Clinical Sciences
1113 Ophthalmology And Optometry
1117 Public Health And Health Services
Socio Economic Objective 929999 Health not elsewhere classified
HERDC Research category C1.1 Refereed article in a scholarly journal
Copyright notice ©1997, Taylor & Francis
Persistent URL http://hdl.handle.net/10536/DRO/DU:30081867

Document type: Journal Article
Collection: PVC's Office - Health
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