Comparison 1. Tobacco.

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
1 Tobacco Use (short‐term)	15		Odds Ratio (Random, 95% CI)	Subtotals only
1.1 Individual Targeted	2	521	Odds Ratio (Random, 95% CI)	0.98 [0.35, 2.73]
1.2 Individual Universal	2	1549	Odds Ratio (Random, 95% CI)	1.03 [0.32, 3.27]
1.3 Family Targeted	2	313	Odds Ratio (Random, 95% CI)	0.78 [0.40, 1.53]
1.4 School Universal	9	15354	Odds Ratio (Random, 95% CI)	0.77 [0.60, 0.97]
2 Tobacco Use (long‐term)	6		Odds Ratio (Random, 95% CI)	Subtotals only
2.1 Individual Targeted	1	397	Odds Ratio (Random, 95% CI)	1.08 [0.56, 2.11]
2.2 Family Targeted	2	1177	Odds Ratio (Random, 95% CI)	0.82 [0.32, 2.14]
2.3 Family Universal	1	237	Odds Ratio (Random, 95% CI)	0.82 [0.38, 1.78]
2.4 School Universal	2	879	Odds Ratio (Random, 95% CI)	0.60 [0.33, 1.09]