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The effect of long working hours on cerebrovascular and cardiovascular disease; A case-crossover study
Kyong-Sok Shin1, Yun Kyung Chung2, Young-Jun Kwon2
1Department of Occupational and Environmental Medicine, Seegene Medical Foundation, Seoul, Korea.
Background:
This study investigated the relationship between weekly working hours and the occurrence of cerebro-cardiovascular diseases using a case-crossover study design.
Methods:
We investigated average working hours during the 7 days before the onset of illness (hazard period) and average weekly working hours between 8 days and 3 months before the onset of cerebro-cardiovascular diseases (control period) for 1,042 cases from the workers' compensation database for 2009.
Results:
Among all subjects, the odds ratio by conditional logistic regression for the risk of cerebro-cardiovascular diseases with a 10 hr increase in average weekly working hours was 1.45 (95% confidence interval [CI]: 1.22-1.72), a significant association.
Conclusions:
An increase in average weekly working hours may trigger the onset of cerebro-cardiovascular disease. Am. J. Ind. Med. 60:753-761, 2017. © 2017. Wiley Periodicals, Inc.
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