|Document ID (ISN)||103188|
|ISSN - Serial title
||0355-3140 - Scandinavian Journal of Work, Environment and Health
|Convention or series no.
||Radon K., Goldberg M., Becklake M.
||Healthy worker effect in cohort studies on chronic bronchitis
||Oct. 2002, Vol.28, No.5, p.328-332. Illus.27 ref.
||Two mechanisms are responsible for the healthy worker effect in respiratory cohort studies. One is health-based selection of workers into employment (healthy hire effect), and the other is health-based losses over time (healthy worker survivor effect). The aim of the present paper was to estimate the magnitude of the healthy worker survivor effect in cohort studies of chronic bronchitis. A meta-analysis of eight cohort studies published between 1980 and 2001 was performed. The pooled odds ratio of the prevalence of chronic bronchitis for subjects leaving the cohorts was 1.23 when these subjects were compared with those who remained under study. The prevalence of respiratory symptoms among exposed workers may be underestimated if the healthy worker survivor effect is not taken into account.
||healthy worker effect; epidemiology; chronic bronchitis
||epidemiological aspects; frequency rates; statistical evaluation; cohort study
||D - Periodical articles
|Country / State or Province||Canada|
|Broad subject area(s)
||Occupational medicine, epidemiology
Diseases of the respiratory system (except for pneumoconiosis & similar)