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Correlates of Nonparticipation in the Canadian Study of Health and Aging

Published online by Cambridge University Press:  10 January 2005

Barbara Helliwell
Affiliation:
Department of Epidemiology and Community Medicine, University of Ottawa
Richard Aylesworth
Affiliation:
Department of Epidemiology and Community Medicine, University of Ottawa
Ian McDowell
Affiliation:
Department of Epidemiology and Community Medicine, University of Ottawa
Mona Baumgarten
Affiliation:
Department of Epidemiology and Preventive Medicine, University of Maryland.
Elizabeth Sykes
Affiliation:
Department of Epidemiology and Community Medicine, University of Ottawa

Abstract

Correlates of nonparticipation in the community interview component of the Canadian Study of Health and Aging and their impact on bias in the results were analyzed. Characteristics of study subjects, their habitats, and encouragement techniques were analyzed to indentify correlates of variation in response rates across the 18 study centers. Refusal rates from 14% to 41% varied by age, gender, city size, number of subjects and length of time for enrollment, and method of approach. Cognitively impaired subjects had higher refusal rates which affected prevalence estimates. At one study site, efforts to “convert” subjects who initially refused to participate in the survey were successful with 26% of those who were recontacted.

Type
INTRODUCTION TO THE CSHA
Copyright
© 2001 International Psychogeriatric Association

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