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Smoking and atherosclerotic cardiovascular disease risk in young men: the Korean Life Course Health Study

 Yongho Jee  ;  Keum Ji Jung  ;  Sunmi Lee  ;  Joung Hwan Back  ;  Sun Ha Jee  ;  Sung-il Cho 
 BMJ Open, Vol.9(6) : e024453, 2019 
Journal Title
 BMJ Open 
Issue Date
cardiovascular disease ; smoking ; young adults
OBJECTIVE: To examine the effect of smoking on risk of atherosclerotic cardiovascular disease (ASCVD) in Korean young men and to examine whether serum total cholesterol levels could modify the effect of smoking on ASCVD. DESIGN: A prospective cohort study within a national insurance system. SETTING: Health screenings provided by national insurance in 1992 and 1994. PARTICIPANTS: A total of 118 531 young men between 20 and 29 years of age and were followed up for an average of 23 years. OUTCOME MEASURE: To assess the independent effects of smoking on the risk of ischaemic heart disease (IHD), stroke and ASCVD, Cox proportional hazards regression models were used, controlling for age, hypertension, diabetes, hypercholesterolaemia and alcohol drinking. RESULTS: The total number of current smokers was 78 455 (66.2%), and 94 113 (79.7%) of the sample recorded a total cholesterol level <200 mg/dL measured at baseline. Between 1993 and 2015, 2786 cases of IHD (53/100 000 person year), 2368 cases of stroke (45.4/100 000 person year) and 6368 ASCVD (122.7/100 000 person year) occurred. The risk of IHD, stroke and total ASCVD events was found to increase for current smokers, with a HR with 95% CI of 1.5 (95% CI 1.3 to 1.6), 1.4 (95% CI 1.2 to 1.6) and 1.4 (95% CI 1.3 to 1.5), respectively. Furthermore, the risks above were also found throughout the range of serum levels of cholesterol. CONCLUSIONS: Smoking among Korean young adult men was independently associated with increased risk of IHD, stroke and ASCVD. The concentration of cholesterol in Korean men did not modify the effect of smoking on ASCVD.
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4. Graduate School of Public Health (보건대학원) > Graduate School of Public Health (보건대학원) > 1. Journal Papers
Yonsei Authors
Jung, Keum Ji(정금지) ORCID logo https://orcid.org/0000-0003-4993-0666
Jee, Sun Ha(지선하) ORCID logo https://orcid.org/0000-0001-9519-3068
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