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Document ID (ISN)101257
CIS number 03-465
ISSN - Serial title 1351-0711 - Occupational and Environmental Medicine
Year 2002
Convention or series no.
Author(s) Liu Y., Tanaka H.
Title Overtime work, insufficient sleep, and risk of non-fatal acute myocardial infarction in Japanese men
Bibliographic information July 2002, Vol.59, No.7, p.447-451. 33 ref.
Abstract The objective of this case-control study was to examine the relation between working hours and hours of sleep on one hand, and the risk of acute myocardial infarction (AMI) on the other. Cases consisted of 260 Japanese men aged 40-79 admitted to hospitals with AMI during 1996-8. Controls consisted of 445 men free from AMI, matched for age and place of residence. It was found that hours worked per week were related to progressively increased odds ratios of AMI in the past year as well as in the past month, with a twofold increased risk for overtime work (weekly working hours ≥61) compared with working hours ≤40. Short time sleep (daily hours of sleep ≤5) and frequent lack of sleep (two or more days/week with less than five hours of sleep) were associated with a two to threefold increased risk. Frequent lack of sleep and few days off in the recent past showed greater odds ratios than those in the past year. It is concluded that overtime work and insufficient sleep may be related to increased risk of AMI.
Descriptors (primary) male workers; myocardial infarction; risk factors; hours of work; sleep deprivation
Descriptors (secondary) Japan; frequency rates; case-control study; hazard evaluation
Document type D - Periodical articles
Country / State or ProvinceJapan
Subject(s) Occupational physiology
Broad subject area(s) Physiology, ergonomics
Browse category(ies) Cardiovascular diseases
Hours of work
Fatigue