Comparison 3. Tailored self‐help vs no self‐help.

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
1 Long‐term abstinence	12	19190	Risk Ratio (M‐H, Random, 95% CI)	1.34 [1.20, 1.49]
1.1 Tailored materials vs no materials	10	14359	Risk Ratio (M‐H, Random, 95% CI)	1.34 [1.19, 1.51]
1.2 Tailored materials vs brief advice	2	2992	Risk Ratio (M‐H, Random, 95% CI)	1.13 [0.86, 1.49]
1.3 Tailored materials as an adjunct to advice	2	1839	Risk Ratio (M‐H, Random, 95% CI)	1.72 [1.17, 2.53]