Walking and mortality in Japan: The Miyagi Cohort Study

Kazuki Fujita, Hideko Takahashi, Chihaya Miura, Takayoshi Ohkubo, Yuki Sato, Takashi Ugajin, Kayoko Kurashima, Yoshitaka Tsubono, Ichiro Tsuji, Akira Fukao, Shigeru Hisamichi

Research output: Contribution to journalArticlepeer-review

32 Citations (Scopus)

Abstract

Background: Although many studies in western populations demonstrated that time spent walking was associated with a reduced risk of all-cause mortality, data on Japanese has been sparse. Methods: In 1990, 20,004 men and 21,159 women in Miyagi Prefecture in rural northern Japan (40-64 year of age) completed a self-administered questionnaire including a question on time spent walking. Cox regression was used to estimate relative risk (RR) of mortality according to three levels of walking (30 minutes or less, between 30 minutes and one hour, and one hour or more), with adjustment for age, education, marital status, past history of diseases, smoking, drinking, body mass index, and dietary variables. During 11 years of follow-up, 1,879 subjects had died. Results: Time spent walking was inversely associated with risk of all-cause mortality: compared with men and women who walked one hour or more per day, multivariate RR (95% confidence intervals) was 1.06 (0.95-1.19) for subjects who walked between 30 minutes and one hour per day, and 1.16 (1.04-1.29) for subjects who walked 30 minutes or less per day (P for trend=0.007). Shorter duration of walking was associated with increased mortality among men who were never smokers (P for trend=0.081) and past smokers (P for trend=0.026), but not among currently smoking men (P for trend=0.751). We observed similar effect modification for women. Conclusions: Time spent walking was associated with a reduced risk for all-cause mortality, especially among nonsmoking men and women.

Original languageEnglish
Pages (from-to)S26-S32
Journaljournal of epidemiology
Volume14
Issue numberSUPPL. 1
DOIs
Publication statusPublished - 2004

Keywords

  • All-cause mortality
  • Prospective cohort study
  • Time spent walking

ASJC Scopus subject areas

  • Epidemiology

Fingerprint Dive into the research topics of 'Walking and mortality in Japan: The Miyagi Cohort Study'. Together they form a unique fingerprint.

Cite this