Abstract:
BACKGROUND:Although sleep is one of the most important health-related factors, the relationship between sleep duration and the incidence of cardiovascular events has not been fully described. METHODS:The present study comprised the 11,367 study subjects (4413 men and 6954 women) of the Jichi Medical School Cohort Study, a population-based prospective study. Baseline data were obtained by questionnaire and health examinations between April 1992 and July 1995 in 12 rural areas in Japan, and the main outcome measures were the incidence of cardiovascular diseases (stroke and myocardial infarction [MI]). Cox proportional hazards models were used to analyze the association between sleep duration and the incidence of cardiovascular events. RESULTS:A total of 481carciovascular events (255 men and 226 women) were observed during an average follow-up period of 10.7 years. After adjusting for age, systolic blood pressure, serum total cholesterol, body mass index, smoking habits, and alcohol drinking habits, the hazard ratios (95% confidence intervals) for the incidence of cardiovascular diseases for individuals sleeping less than 6 hours and 9 hours or longer were 2.14 (1.11-4.13) and 1.33 (0.93-1.92) in men, and 1.46 (0.70-3.04) and 1.28 (0.88-1.87) in women, respectively, relative to those who reported sleeping 7 to 7.9 hours per day. CONCLUSIONS:Our data indicate that men who sleep less than 6 hours a day have a higher risk of cardiovascular events than those sleeping 7 to 7.9 hours.
journal_name
J Epidemioljournal_title
Journal of epidemiologyauthors
Amagai Y,Ishikawa S,Gotoh T,Kayaba K,Nakamura Y,Kajii Edoi
10.2188/jea.je20090053subject
Has Abstractpub_date
2010-01-01 00:00:00pages
106-10issue
2eissn
0917-5040issn
1349-9092pii
JST.JSTAGE/jea/JE20090053journal_volume
20pub_type
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