title: Exposure to environmental tobacco smoke in Chinese new mothers decreased during pregnancy.
abstract: OBJECTIVE
  To determine the current status of environmental tobacco smoke (ETS) exposure in new mothers living in urban Shanghai.
  
  
  METHODS
  A cross-sectional study was carried out in three communities of Shanghai from June 2005 to August 2006. A total of 950 new mothers with infants aged 5-8 months were recruited in community health centers by trained health workers. The prevalence of ETS exposure was determined for before, during, and after pregnancy. Chi-square test and logistical regression analysis were used in statistical analysis.
  
  
  RESULTS
  The prevalence of ETS exposure was 55.9% (95% confidence interval [CI]: 52.2, 59.6) before pregnancy and decreased significantly to 41.9% (95% CI: 38.2, 45.6) during pregnancy. However, the amount and time of exposure to ETS changed little before, during, and after pregnancy for those exposed. Among husbands who ever smoked, 14.4% stopped smoking before pregnancy, 38.1% changed smoking behaviors during pregnancy, and after pregnancy 10.7% quit smoking, whereas three nonsmoking husbands began to smoke.
  
  
  CONCLUSIONS
  Pregnancy is a very important time period to implement tobacco control projects targeting young male smokers.
authors.affiliation: Department of Epidemiology, School of Public Health, Fudan University, Shanghai, China.
authors.forename: Chaowei
authors.initials: C
authors.lastname: Fu
authors.forename: Yue
authors.initials: Y
authors.lastname: Chen
authors.forename: Tieying
authors.initials: T
authors.lastname: Wang
authors.forename: Nancy
authors.initials: N
authors.lastname: Edwards
authors.forename: Biao
authors.initials: B
authors.lastname: Xu
mesh_terms: D000328:Adult; D002681:China; D004781:Environmental Exposure / Q000032:analysis*; D004784:Environmental Monitoring / Q000379:methods; D004812:Epidemiologic Methods; D062665:Epidemiological Monitoring; D005260:Female; D006801:Humans; D007223:Infant; D008297:Male; D018811:Maternal Exposure / Q000706:statistics & numerical data*; D011247:Pregnancy; D012907:Smoking; D016540:Smoking Cessation; D014028:Tobacco Smoke Pollution / Q000032:analysis*; D014504:Urban Health / Q000706:statistics & numerical data; D055815:Young Adult
chemical_list: D014028:Tobacco Smoke Pollution