The Attributable Risk of Smoking on All-Cause Mortality in Korean: A Study Using KNHANES IV–VI (2007–2015) with Mortality Data
Background It is not evident that the attributable risk of smoking on mortality in Korea has decreased. We investigated the impact of smoking on all-cause mortality and estimated the attributable risk of smoking in Korean adults. Methods Those aged ≥20 years with smoking history in the Korean Nation...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
The Korean Academy of Tuberculosis and Respiratory Diseases
2020-10-01
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| Series: | Tuberculosis and Respiratory Diseases |
| Subjects: | |
| Online Access: | http://www.e-trd.org/upload/pdf/trd-2020-0006.pdf |
| Summary: | Background It is not evident that the attributable risk of smoking on mortality in Korea has decreased. We investigated the impact of smoking on all-cause mortality and estimated the attributable risk of smoking in Korean adults. Methods Those aged ≥20 years with smoking history in the Korean National Health and Nutrition Examination Surveys (KNHANES) 2007–2015 were enrolled. We categorized the participants into three groups as follows: never smoker, <20 pack-years (PY) smokers, and ≥20 PY smokers. We applied inverse probability weighting using propensity scores to control various confounders between the groups. All-cause mortality risks were compared between the groups using the Kaplan-Meier log-rank test. The effects of smoking-attributable risks (ARs) on mortality were also calculated. Results A total of 50,458 participants were included. Among them, 19,334 (38.3%) were smokers and 31,124 (61.7%) were never smokers. Those with a smoking history of 20 PY or more (≥20 PY smokers), those with a smoking history of less than 20 PY (<20 PY smokers), and never smokers were 18.1%, 20.2%, and 61.7%, respectively, of the study population. Smokers had a higher risk of all-cause mortality compared to never smokers (log-rank test p<0.01). The ARs of smoking were 21.8% (95% confidence interval [CI], 5.7%–37.9%) and 9.0% (95% CI, 6.1%–12.0%) in males and females, respectively. ARs decreased from 24.2% to 19.5% in males and from 9.5% to 4.1% in females between 2007–2010 and 2011–2015. Conclusion Our study using KNHANES IV–VI data demonstrated that smoking increased the risk of all-cause mortality in a dose-response manner and the ARs of smoking on mortality were 21.8% in males and 9.0% in females during 2007– 2015. This suggests that the ARs of smoking on mortality have decreased since around 2010. |
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| ISSN: | 1738-3536 2005-6184 |