Comparison 5. Smartphone app versus lower‐intensity smoking cessation support.

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
1 Long‐term abstinence (all randomised)	5	3079	Risk Ratio (M‐H, Random, 95% CI)	1.00 [0.66, 1.52]
1.1 Comparison: minimal non‐app SC support	2	1645	Risk Ratio (M‐H, Random, 95% CI)	0.82 [0.56, 1.18]
1.2 Comparator: less intensive smartphone app	3	1434	Risk Ratio (M‐H, Random, 95% CI)	1.12 [0.60, 2.09]
2 Long‐term abstinence (complete case)	5	1774	Risk Ratio (M‐H, Random, 95% CI)	1.06 [0.72, 1.54]
2.1 Comparison: minimal non‐app SC support	2	771	Risk Ratio (M‐H, Random, 95% CI)	0.87 [0.62, 1.23]
2.2 Comparator: less intensive smartphone app	3	1003	Risk Ratio (M‐H, Random, 95% CI)	1.18 [0.67, 2.09]