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Working overtime and risk factors for coronary heart disease: A propensity score analysis based in the J‐SHINE (Japanese Study of Stratification, Health, Income, and Neighborhood) study
Author(s) -
Tsuboya Toru,
Aida Jun,
Osaka Ken,
Kawachi Ichiro
Publication year - 2015
Publication title -
american journal of industrial medicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.7
H-Index - 104
eISSN - 1097-0274
pISSN - 0271-3586
DOI - 10.1002/ajim.22409
Subject(s) - medicine , overtime , overweight , sleep deprivation , odds ratio , obesity , logistic regression , demography , propensity score matching , occupational stress , environmental health , gerontology , physical therapy , clinical psychology , circadian rhythm , sociology , political science , law
Background Evidence on the causal relationship between working overtime and the risk of coronary heart disease is limited. Methods We surveyed 2355 workers in Japan and conducted propensity‐matched logistic regression analysis, using propensity‐matched 438 pairs, to evaluate the associations between working overtime (more than 50 hr per week) and coronary risk factors: physical inactivity, cigarette smoking, sleep deprivation (<5 hr/day), psychological stress, overweight/obesity, and excessive alcohol consumption. The exposure and outcomes were self‐reported. Results Among 2355 workers, 476 participants worked overtime. Propensity‐matched analysis revealed that the associations between working overtime and sleep deprivation (odds ratios (OR) and 95% confidence intervals: 2.33, 1.39–3.88) and high stress (2.13, 1.60–2.82). The associations between working overtime and physical inactivity, current smoking, and overweight/obesity were not statistically significant. Excessive alcohol consumption was inversely associated with working overtime. Conclusions Working overtime was positively associated with two coronary risk factors: sleep deprivation and increased psychological stress. Am. J. Ind. Med. 58:229–237, 2015. © 2015 Wiley Periodicals, Inc.