Relative Efficacy

| Medication |
Number of arms |
Estimated odds ratio (95% C.I.) |
Nicotine Patch (reference group) |
32 |
1.0 |
Varenicline (2 mg/day) |
5 |
1.6
(1.3, 2.0) |
Patch (long-term; >14 weeks) + NRT (gum or spray) |
3 |
1.9
(1.3, 2.7) |
Patch + Bupropion SR |
3 |
1.3
(1.0, 1.8) |
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