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. 2021 Sep 14;2021(9):CD010216. doi: 10.1002/14651858.CD010216.pub6

Comparison 3. Nicotine EC versus non‐nicotine EC.

Outcome or subgroup title No. of studies No. of participants Statistical method Effect size
3.1 Smoking cessation 5 1447 Risk Ratio (M‐H, Fixed, 95% CI) 1.94 [1.21, 3.13]
3.2 Adverse events 3 601 Risk Ratio (M‐H, Fixed, 95% CI) 1.01 [0.91, 1.11]
3.2.1 1 week 1 48 Risk Ratio (M‐H, Fixed, 95% CI) 1.50 [0.27, 8.19]
3.2.2 6 months 1 298 Risk Ratio (M‐H, Fixed, 95% CI) 0.97 [0.71, 1.34]
3.2.3 12 weeks 1 255 Risk Ratio (M‐H, Fixed, 95% CI) 1.01 [0.94, 1.08]
3.3 Serious adverse events 6 1033 Risk Ratio (M‐H, Fixed, 95% CI) 0.95 [0.52, 1.72]
3.3.1 1 week 1 48 Risk Ratio (M‐H, Fixed, 95% CI) Not estimable
3.3.2 4 weeks 1 74 Risk Ratio (M‐H, Fixed, 95% CI) Not estimable
3.3.3 6 months 3 794 Risk Ratio (M‐H, Fixed, 95% CI) 0.95 [0.52, 1.72]
3.3.4 1 year 1 117 Risk Ratio (M‐H, Fixed, 95% CI) Not estimable
3.4 Carbon monoxide (ppm) 3 320 Mean Difference (IV, Fixed, 95% CI) ‐1.88 [‐2.67, ‐1.09]
3.4.1 2 weeks 1 25 Mean Difference (IV, Fixed, 95% CI) ‐0.40 [‐3.00, 2.20]
3.4.2 12 weeks 1 146 Mean Difference (IV, Fixed, 95% CI) ‐3.40 [‐5.18, ‐1.62]
3.4.3 6 months 1 149 Mean Difference (IV, Fixed, 95% CI) ‐1.65 [‐2.59, ‐0.71]
3.5 Heart rate 1   Mean Difference (IV, Fixed, 95% CI) Totals not selected
3.5.1 12 weeks 1   Mean Difference (IV, Fixed, 95% CI) Totals not selected
3.6 Systolic blood pressure 1   Mean Difference (IV, Fixed, 95% CI) Totals not selected
3.6.1 12 weeks 1   Mean Difference (IV, Fixed, 95% CI) Totals not selected
3.7 FeNO (ppb) 1   Mean Difference (IV, Fixed, 95% CI) Totals not selected
3.7.1 12 weeks 1   Mean Difference (IV, Fixed, 95% CI) Totals not selected
3.8 FEV1 (l) 1   Std. Mean Difference (IV, Fixed, 95% CI) Totals not selected
3.8.1 12 weeks 1   Std. Mean Difference (IV, Fixed, 95% CI) Totals not selected
3.9 FVC (l) 1   Mean Difference (IV, Fixed, 95% CI) Totals not selected
3.9.1 12 weeks 1   Mean Difference (IV, Fixed, 95% CI) Totals not selected
3.10 FEV1/FVC 1   Mean Difference (IV, Fixed, 95% CI) Totals not selected
3.10.1 12 weeks 1   Mean Difference (IV, Fixed, 95% CI) Totals not selected
3.11 NNAL (pg/mg creatinine) at 24 weeks 1   Mean Difference (IV, Fixed, 95% CI) Totals not selected
3.12 Product use at 6+ months 2 399 Risk Ratio (M‐H, Fixed, 95% CI) 1.18 [0.91, 1.54]