Secondhand smoke exposure at home in China
Lin Xiao 1  
,   Jingru Zhang 2,   Yi Nan 1,   Lili Wang 1,   Yuan Jiang 1
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China CDC, Tobacco Control Office, China
Peking University, School of Public Health, China
Publication date: 2018-03-01
Tob. Induc. Dis. 2018;16(Suppl 1):A168
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China took great efforts to protect people from secondhand smoke (SHS), including health education, smoke-free environment creating and smoke-free law promotion. Now, more and more people support smoke-free in public places. This study aims to assess secondhand smoke (SHS) exposure at home and to examine factors associated with it in China.

A cross-sectional study was conducted among Chinese aged 15 years and above. Using a multistage complex survey design, 336 counties/districts (PSUs) were selected nationwide. In total, 15,095 individuals completed the survey and the response rate was 92.2%. Data were weighted and analyzed by SPSS 20.0 complex survey data analysis program, and Logistic regression was used for exploring potential factors associated with SHS exposure at home.

The proportion of nonsmokers exposed to SHS at home was 46.7% (37.4% for male and 51.4% for female). Among female respondents, 41.9% reported being exposed to SHS every day in the last 30 days. SHS exposure rate was highest among primary (50.8%) and middle school (53.4%), followed by high school (46.8%), college and above was the lowest (30.2%). The rate also decreased as respondents' age goes up, nonsmokers in the age group 15-24, 25-44, 45-64, 65 years old and above had 55.8%, 45.5%, 44.0% and 38.8% SHS exposure rate respectively. Moreover, the rate is higher in rural area (57.5%) than in urban area (36.9%). Nonsmoker exposed to SHS at workplace had higher SHS exposure rate at home than those who did not exposed at workplace. (OR=1.40, 95%CI: 1.10 -1.79).

SHS exposure at home is a serious public health problem, especially for women. Lower education, younger people, and those in rural area are more likely to be exposed to SHS at home. 100% smoke-free policy in workplaces might be helpful to reduce SHS exposure in home.