marginal significancep=0.09
Subgroup analyses Table 3 shows that the intervention effect was greater in females (8.4% vs 2.3%; OR=3.91; 95% CI: 0.79–19.42) than in males (4.4% vs 5.3%, OR=0.82; 95% CI: 0.36–1.88) at 12 months and in those who were not ready to quit in 30 days (3.9% vs 1.1%; OR=3.70; 95% CI: 0.74–18.60) than those who were ready to quit in 30 days (4.0% vs 5.5%; OR=0.71; 95% CI: 0.25–2.01) at 6 months with marginal significance of interaction (both p=0.09).