Comparison 2. Acceptance and commitment therapy (ACT).

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
2.1 ACT vs matched‐intensity smoking cessation treatment	5		Risk Ratio (M‐H, Random, 95% CI)	Subtotals only
2.1.1 Face‐to‐face	2	550	Risk Ratio (M‐H, Random, 95% CI)	0.76 [0.32, 1.78]
2.1.2 Telephone	1	121	Risk Ratio (M‐H, Random, 95% CI)	1.35 [0.74, 2.46]
2.1.3 Website	1	2637	Risk Ratio (M‐H, Random, 95% CI)	0.91 [0.79, 1.05]
2.1.4 Smartphone app	1	2415	Risk Ratio (M‐H, Random, 95% CI)	1.77 [1.32, 2.37]
2.2 ACT vs NRT	1	102	Risk Ratio (M‐H, Random, 95% CI)	1.27 [0.53, 3.02]
2.3 ACT vs brief advice	1	144	Risk Ratio (M‐H, Random, 95% CI)	1.27 [0.59, 2.75]
2.4 ACT vs less intensive ACT	1	100	Risk Ratio (M‐H, Random, 95% CI)	1.00 [0.50, 2.01]
2.5 Mental health outcomes	2		Other data	No numeric data