Overtime work, insufficient sleep, and risk of non-fatal acute myocardial infarction in Japanese men

Ying Liu, Keiichi Tanaka, Hiroko Kodama, Suminori Kono, Yoshihiro Miyake, Shizuka Sasazuki, Keitaro Tanaka, Shoji Tokunaga, Kouichi Yoshimasu, Masakazu Washio, Masahiro Mohri, Akira Takeshita, Kikuo Arakawa, Munehito Ideishi, Takanobu Nii, Kazuyuki Shirai, Koichi Handa, Keiichi Tanaka, Hidekazu Arai, Yoshitaka DoiTomoki Kawano, Osamu Nakagaki, Kazuyuki Takada, Yasushi Sasaki, Yasushi Ishihara, Tetsuji Inoh, Fumio Oshima, Tomoki Honma, Samon Koyanagi, Yasuo Hayashi, Yuji Taira, Yuji Maruoka, Ken Abe, Shunji Miake, Suguru Mori, Shinya Oda, Ryuichi Nagashima, Ichiro Ohmura, Tadayuki Hiroki, Ryuichiro Miyawaki, Juzabu Jinnouchi, Shinichiro Ito, Kazuyuki Saito, Terutoshi Tanioka, Kohzo Iino, Yasuhiro Maeda, Yasuhiko Orita, Yohsuke Katsuta, Hidero Nakazono, Naotaka Hamasaki, Hitomi Hayabuchi, Sumie Jingu, Ryoko Hayashi, Masako Sakamoto, Yoshiki Egashira, Tadashi Enomoto, Masanori Fujino, Keisuke Fukuda, Masakazu Gondo, Shouhei Hata, Satoshi Hiratsuka, Takashi Ichiki, Nariaki Ikeda, Yasuto Iwanaga, Hisashi Kanaya, Yoshihiro Kato, Masaki Kohara, Nobuo Masuda, Hideyo Matsuguchi, Eiichi Murayama, Masatsugu Ohga, Hideaki Ogushi, Nobuo Ouchi, Hiroshi Saku, Teizo Sata, Kuninori Soejima, Hiroshi Takamiya, Shinsuke Takei, Masafumi Tanaka, Noritami Tashiro, Takehiko Yamada, Tsutomu Yamamoto, Yoshiki Egashira, Tadashi Enomoto, Masanori Fujino, Keisuke Fukuda, Masakazu Gondo, Shouhei Hata, Satoshi Hiratsuka, Takashi Ichiki, Nariaki Ikeda, Yasuto Iwanaga, Hisashi Kanaya, Yoshihiro Kato, Masaki Kohara, Nobuo Masuda, Hideyo Matsuguchi, Eiichi Murayama, Masatsugu Ohga, Hideaki Ogushi, Nobuo Ouchi, Hiroshi Saku, Teizo Sata, Kuninori Soejima, Hiroshi Takamiya, Shinsuke Takei, Masafumi Tanaka, Noritami Tashiro, Takehiko Yamada, Tsutomu Yamamoto, Masato Yoshida

Research output: Contribution to journalArticle

181 Citations (Scopus)

Abstract

Objectives: To examine the relation between working hours and hours of sleep and the risk of acute myocardial infarction (AMI), with special reference to the joint effect of these two factors. Method: Case-control study in Japan. Cases were 260 men aged 40-79 admitted to hospitals with AMI during 1996-8. Controls were 445 men free from AMI matched for age and residence who were recruited from the resident registers. Odds ratios of AMI relative to mean weekly working hours and daily hours of sleep in the past year or in the recent past were calculated. Results: Weekly working hours 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 (2 or more days/week with <5 hours of sleep) were also associated with a two to three-fold increased risk. Frequent lack of sleep and few days off in the recent past showed greater odds ratios than those in the past year. Conclusions: Overtime work and insufficient sleep may be related to increased risk of AMI.

Original languageEnglish
Pages (from-to)447-451
Number of pages5
JournalOccupational and Environmental Medicine
Volume59
Issue number7
DOIs
Publication statusPublished - Jul 30 2002

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All Science Journal Classification (ASJC) codes

  • Public Health, Environmental and Occupational Health

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