An exploratory study of control of smoking in the home to reduce infant exposure to environmental tobacco smoke.

This study examined control of environmental tobacco smoke (ETS) exposure in the home by new mothers and identified factors related to the establishment of home smoking control rules. Pregnant women who, at 28 weeks gestation, reported they had not smoked in the past 28 days were enrolled in a randomized smoking cessation study. Telephone interviews were conducted at 6 weeks, 3 months, 6 months, and 12 months postpartum. A Home Smoking Control Index, composed of four items (whether the mother smokes in the home, the partner smokes in the home, other household smokers are asked to smoke outside, and visitors who smoke are asked to smoke outside), was used to classify homes as having a home smoking policy in effect, no policy or an incomplete policy, or no policy needed. Sociodemographic variables and maternal self-efficacy were examined in relation to the index data among 325 women who had need to exercise control of smoking in the home: 63% had a home smoking policy in effect at 3 months, 60% at 6 months, and 64% at 12 months postpartum. Predictors of policy at 6 and 12 months included (a) having a policy in effect at the previous assessment, (b) confidence in limiting infant ETS exposure in the home, and (c) perceived difficulty in preventing exposure. Early establishment of a policy appears to be important for ensuring sustained infant ETS avoidance over time. The index measures key actions that influence infant exposure and warrants further testing for use in intervention trials.