Table. Comparative efficacy of drugs for smoking cessation 6.
| Comparison | Odds ratio * |
|---|---|
| NRT vs placebo | 1.84 (1.71–1.99) |
| Combination NRT vs placebo | 2.04 (1.25–2.38) |
| Bupropion vs placebo | 1.82 (1.6–2.06) |
| Varenicline vs placebo | 2.88 (2.4–3.47) |
| Combination NRT vs monotherapy NRT | 1.34 (1.0–1.8) |
| Bupropion vs NRT | 0.99 (0.86–1.13) |
| Varenicline vs NRT | 1.57 (1.29–1.91) |
| Varenicline vs combination NRT | 1.06 (0.75–1.48) |
| Varenicline vs bupropion | 1.59 (1.29–1.96) |
NRT nicotine replacement therapy * odds ratio (with 95% confidence interval) calculated on quit rates for six months or longer