Effect of Second-Hand Smoke Exposure on Lung Function among Non-Smoking Korean XXXX .

@entity1 @entity285 @entity358 @entity4874
BACKGROUND: Previous literature has implicated that there might be an individual susceptibility difference in terms of race/ethnicity and gender in response to second hand smoke (SHS) exposure. This study was done to examine the effect of SHS exposure on lung function in non-smoking Korean @entity1 . METHODS: This cross-sectional study was conducted using the Korea National Health and Nutrition Examination Survey (KNHANES) from 2008-2011. A total of 2,513 female @entity1 , age 40 yr and older, with no respiratory symptoms or prior @entity358 , were included in this study. @entity1 ' smoking status was examined using both self-reported history and measurement of urinary @entity4874 level. Lung function was assessed using spirometry data, including FVC and FEV1. T-test and Chi-square tests were performed to compare diverse variables between groups. Analysis of covariance (ANCOVA) adjusted for age, height, @entity285 consumption, and level of exercise was used to see any statistical differences in lung function parameters between non-SHS exposed and SHS-exposed groups. RESULTS: Among 2,513 non-smoking females, 767 (30.5%) were SHS-exposed. The urinary @entity4874 levels clearly distinguished SHS exposure, and the mean urinary @entity4874 levels were 7.1  0.4 and 11  0.7 in non-SHS exposed group vs. SHS-exposed group, respectively (P < 0.001). Urinary @entity4874 levels were correlated with duration of SHS exposure. However, both groups had normal lung function and there was no significant difference between the two groups in lung function. CONCLUSIONS: Urinary @entity4874 is a valuable marker of SHS exposure. Korean @entity1 may have higher tolerance for SHS exposure-induced lung function decline.
