Comparison 1. Text messaging versus minimal smoking cessation support.

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
1 Long‐term abstinence (all randomised))	13	14133	Risk Ratio (M‐H, Random, 95% CI)	1.54 [1.19, 2.00]
2 Long‐term abstinence (complete case)	13	11969	Risk Ratio (M‐H, Random, 95% CI)	1.56 [1.21, 2.02]