Author's Response to Reviews Theinfluenceofin-pregnancysmokingcessationprogramsonpartnerquitting Andwomen'ssocialsupportmobilization.arandomizedcontrolledtrial. Runningtitle Partnerquittingandsocialsupport:anrct

Background Smoking cessation interventions in pregnancy could influence a woman’s social behaviour and her partner’s smoking behaviour, but this has not been examined in any published randomized trials. Method 918 women smoking at booking for antenatal care were enrolled in a clusterrandomized trial of three interventions: standard care, self-help manual and enhanced stage-based counselling, or self-help manual, enhanced stage-based counselling and use of an interactive computer program. The outcomes were change in social support received by women between booking for maternity care and 30 weeks gestation and 10 days postpartum and reported cessation in the woman’s partner at these times. Results Few pregnant women’s partners stopped smoking (4.1% at 30 weeks of gestation and 5.8% at 10 days postpartum) and the probability of quitting did not differ significantly by trial arm. Women’s scores on the Inventory of Socially Supportive Behaviours showed a slight decline from booking to 30 weeks gestation, and a slight increase to 10 days postpartum, but these changes did not differ significantly by trial arm.