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KMID : 1231220140050020086
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Journal of the Korean Society for Research on Nicotine and Tobacco
2014 Volume.5 No. 2 p.86 ~ p.93
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Relationship between Age of Smoking Initiation and Obesity in Korean Adult Men
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Um Jae-Yean
Lee Cheol-Min
Han Na-Rae
Song Dong-Ju
Kim Min-Gyou
Kwon Hyuk-Tae
Oh Seung-Won
Joh Hee-Kyung
Chun So-Hyun
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Abstract
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Background: Previous studies have suggested that smoking has a dose-dependent positive association with obesity and abdominal obesity. Moreover it is reported that early smoking initiation increases the risk of smoking-related disease. We studied the relationship between age of smoking initiation and obesity, abdominal obesity in Korean adult men.
Methods: Total of 4,386 men aged more than 20 years old from the 4th and 5th (2007-2010) Korean National Health and Nutrition Examination Survey were included in this study. We excluded past smokers. Subjects were classified into four groups by age of smoking initiation (nonsmoker, Group I: Age on starting smoking ≥20 years, Group II: 18≤, ＜20, Group III: ＜18). Obesity was defined as body max index ≥25 kg/m2 and abdominal obesity was defined as waist circumference ≥90 cm. The risk of obesity and abdominal obesity was analyzed by multiple logistic regression analysis after adjusting confounders including pack years.
Results: Age of smoking initiation was significantly associated with the abdominal obesity. After adjusting for confounders including pack years, odds ratio (95% confidence interval) for abdominal obesity compared with nonsmoker was 1.08 (0.78-1.50) in group I, 1.40 (0.95-2.03) in group II and 1.58 (1.07-2.33) in group III, respectively. After restricting the analyses to current smoker, we found significant association of age of smoking initiation with abdominal obesity (P for trend=0.03). But there was no statistically significant relationship between obesity and age of smoking initiation.
Conclusion: Adjusting life time amount of smoking, early smoking initiation is positively associated with abdominal obesity in Korean adult men.
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KEYWORD
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Smoking, Abdominal obesity, Obesity, Waist circumference
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