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Yonsei Med J. 2009 Jun 30;50(3):345-51. doi: 10.3349/ymj.2009.50.3.345. Epub 2009 Jun 23.

Self-reported exposure to second-hand smoke and positive urinary cotinine in pregnant nonsmokers.

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  • 1Department of Family Medicine, Hallym University Sacred Heart Hospital, Anyang, Korea.

Abstract

PURPOSE:

This cross-sectional study aimed to examine the association between self-reported exposure status to second-hand smoke and urinary cotinine level in pregnant nonsmokers.

MATERIALS AND METHODS:

We recruited pregnant nonsmokers from the prenatal care clinics of a university hospital and two community health centers, and their urinary cotinine concentrations were measured.

RESULTS:

Among a total of 412 pregnant nonsmokers, the proportions of self-reported exposure to second-hand smoke and positive urinary cotinine level were 60.4% and 3.4%, respectively. Among those, 4.8% of the participants who reported exposure to second-hand smoke had cotinine levels of 40 ng/mL (the kappa value = 0.029, p = 0.049). Among those who reported living with smokers (n = 170), "smoking currently permitted in the whole house" (vs. not permitted at home) was associated with positive urinary cotinine in the univariable analysis. Furthermore, this variable showed a significant association with positive urinary cotinine in the stepwise multiple logistic regression analysis [Odds ratio (OR), 15.6; 95% Confidence interval (CI) = 2.1-115.4].

CONCLUSION:

In the current study, the association between self-reported exposure status to second-hand smoke and positive urinary cotinine in pregnant nonsmokers was poor. "Smoking currently permitted in the whole house" was a significant factor of positive urinary cotinine in pregnant nonsmokers. Furthermore, we suggest that a complete smoking ban at home should be considered to avoid potential adverse effects on pregnancy outcomes due to second-hand smoke.

KEYWORDS:

Passive smoking; cotinine; pregnant women

PMID:
19568595
[PubMed - indexed for MEDLINE]
PMCID:
PMC2703756
Free PMC Article
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