Comparison 6. Nicotine EC + NRT versus NRT.

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
6.1 Smoking cessation	1		Risk Ratio (M‐H, Fixed, 95% CI)	Totals not selected
6.2 Adverse events	2		Risk Ratio (M‐H, Fixed, 95% CI)	Totals not selected
6.2.1 12 weeks	2		Risk Ratio (M‐H, Fixed, 95% CI)	Totals not selected
6.3 Serious adverse events	4	930	Risk Ratio (M‐H, Fixed, 95% CI)	1.41 [0.60, 3.31]
6.3.1 5 weeks	1	7	Risk Ratio (M‐H, Fixed, 95% CI)	Not estimable
6.3.2 12 weeks	2	298	Risk Ratio (M‐H, Fixed, 95% CI)	2.12 [0.48, 9.28]
6.3.3 6 months	1	625	Risk Ratio (M‐H, Fixed, 95% CI)	1.12 [0.39, 3.27]