Comparison 6. Interventions for smokers not calling quitlines ‐ subgroups by baseline support.

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
1 Cessation at longest follow‐up	65	41233	Risk Ratio (M‐H, Random, 95% CI)	1.25 [1.15, 1.35]
1.1 Adjunct to self‐help or minimal intervention	35	22917	Risk Ratio (M‐H, Random, 95% CI)	1.35 [1.16, 1.57]
1.2 Adjunct to brief intervention or counselling	12	4234	Risk Ratio (M‐H, Random, 95% CI)	1.30 [1.12, 1.50]
1.3 Adjunct to pharmacotherapy	18	12865	Risk Ratio (M‐H, Random, 95% CI)	1.14 [1.03, 1.26]
1.4 Adjunct to incentives for smoking cessation	1	1217	Risk Ratio (M‐H, Random, 95% CI)	1.05 [0.67, 1.65]