Background: Higher acculturation is associated with Asian-American smoking prevalence decreasing in men and increasing in women. Asian immigrants in California are significantly more likely than their counterparts in Asia to have quit smoking. Smoke-free environments may mediate this acculturation effect because such environments are not widespread in Asia. Methods: In 2006, Asian-American current and former smokers were analyzed using the 2003 California Health Interview Survey. A multivariate logistic regression analysis examined how the interaction between having a smoke-free-home rule and immigrating to the U.S. is associated with status as a former smoker and lighter smoking. Results: For recent Asian immigrants (<10 years in the U.S.) and longer-term residents (born/≥10 years in the U.S.), having a smoke-free-home rule was associated with status as a former smoker (OR 14.19, 95% CI=4.46, 45.12; OR 3.25, 95% CI=1.79, 5.90, respectively). This association was stronger for recent immigrants (p=0.02). Having a smoke-free-home rule was associated with lighter smoking only for longer-term residents (OR 5.37, 95% CI=2.79, 10.31). Conclusions: For Asian Americans, smoke-free-home rules are associated with status as a former smoker, particularly among recent immigrants, and lighter smoking in long-term residents. Interventions encouraging Asian Americans to adopt smoke-free-home rules should be evaluated. © 2008 American Journal of Preventive Medicine.

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immigrant Asian home multivariate logistic regression analysis risk human middle aged controlled study Aged housing interview Confidence interval United States Humans smoking Adolescent California Asian Americans male Emigrants and Immigrants Acculturation Asian American female Multivariate Analysis Article intervention study adult smoke health survey