Fig. 1From: Birth weight differences between those offered financial voucher incentives for verified smoking cessation and control participants enrolled in the Cessation in Pregnancy Incentives Trial (CPIT), employing an intuitive approach and a Complier Average Causal Effects (CACE) analysisMean (95% CI) birth weight (in g) in relation to the randomised group, and smoking status measured as the primary outcome. Size of circles is in proportion to the number of babiesBack to article page