[Correlates of smoking in pregnant women in six Brazilian cities].

Objective: To evaluate sociodemographic and lifestyle correlates of smoking in pregnant women sampled from hospitals.

Methods: A cross-sectional study was conducted in 5,539 pregnant women aged 20 or more who sought medical attention in prenatal clinics of affiliate hospitals of the Brazilian National Health System in the cities of Manaus, Fortaleza, Salvador, Rio de Janeiro, São Paulo, and Porto Alegre from 1991 to 1995. Interviews were conducted using a standardized questionnaire that covered sociodemographics and smoking habits before and during pregnancy.