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BMC Public Health. 2012; 12: 673.
Published online Aug 20, 2012. doi:  10.1186/1471-2458-12-673
PMCID: PMC3490935
Effects of a combined lifestyle score on 10-year mortality in Korean men and women: a prospective cohort study
Ji Eun Yun,1 Soyoung Won,2,3 Heejin Kimm,2,3 and Sun Ha Jeecorresponding author2,3
1Department of Rehabilitation Standard & Policy, Korea National Rehabilitation Research Institute, Seoul, Republic of Korea
2Institute for Health Promotion, Yonsei University, Seoul, Republic of Korea
3Department of Epidemiology and Health Promotion, Graduate School of Public Health, Yonsei University, Seoul, Republic of Korea
corresponding authorCorresponding author.
Ji Eun Yun: jeyun/at/korea.kr; Soyoung Won: wonsy/at/yuhs.ac; Heejin Kimm: heejink/at/yuhs.ac; Sun Ha Jee: jsunha/at/yuhs.ac
Received January 19, 2012; Accepted June 26, 2012.
Abstract
Background
Most studies that have evaluated the association between combined lifestyle factors and mortality outcomes have been conducted in populations of Caucasian origin. The objective of this study was to examine the association between combined lifestyle scores and the risk of mortality in Korean men and women.
Methods
The study population included 59,941 Koreans, 30–84 years of age, who had visited the Severance Health Promotion Center between 1994 and 2003. Cox regression models were fitted to establish the association between combined lifestyle factors (current smoker, heavy daily alcohol use, overweight or obese weight, physical inactivity, and unhealthy diet) and mortality outcomes.
Results
During 10.3 years of follow-up, there were 2,398 cases of death from any cause. Individual and combined lifestyle factors were found to be associated with the risk of mortality. Compared to those having none or only one risk factor, in men with a combination of four lifestyle factors, the relative risk for cancer mortality was 2.04-fold, for non-cancer mortality 1.92-fold, and for all-cause mortality 2.00-fold. In women, the relative risk was 2.00-fold for cancer mortality, 2.17-fold for non-cancer mortality, and 2.09-fold for all-cause mortality. The population attributable risks for all-cause mortality for the four risk factors combined was 44.5% for men and 26.5% for women.
Conclusion
This study suggests that having a high (unhealthy) lifestyle score, in contrast to a low (healthy) score, can substantially increase the risk of death by any cause, cancer, and non-cancer in Korean men and women.
Keywords: Lifestyle factor, Mortality, Cohort study, Population attributable risk
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