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Scand J Work Environ Health. 1999 Apr;25(2):100-4.

Relationship between shift work and onset of hypertension in a cohort of manual workers.

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  • 1Department of Public Health, Kanazawa Medical University, Ishikawa, Japan.

Abstract

OBJECTIVES:

This study investigated the possibility of a relationship between blood pressure level and rotating 3-shift work in a prospective follow-up of workers in a zipper and aluminum sash factory in Japan.

METHODS:

Altogether 1551 men aged 18-49 years were followed prospectively for 5 years, and the cumulative incidence of hypertension among 3-shift workers was compared with that of day workers. A multiple logistic analysis was used for adjusting for base-line characteristics such as age, body mass index, blood pressure, and drinking habit.

RESULTS:

In the younger age group, the relative risk of the rotating 3-shift workers during the observational period was increased compared with that of day workers after adjustment for the confounding factors. In the older group, the cumulative incidence of hypertension was not higher for workers who had continued shift work. However, a relatively high risk of hypertension was found for workers who converted from 3-shift work to day work when compared with those who remained on shift work and day work.

CONCLUSIONS:

It is suggested that there is an association between 3-shift work and blood pressure.

PMID:
10360464
[PubMed - indexed for MEDLINE]
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