OTC NRT versus prescription NRT
| Study | Abstinent with OTC | Abstinent with prescription | Unadjusted OR (95% CI) | Unadjusted OR (95% CI) |
|---|---|---|---|---|
| Korberly et al33 | 169/1721 | 146/1514 | 1.0 (0.8 to 1.3) | |
| Leischow et al34 | 1/149 | 3/151 | 0.3 (0.0 to 3.2) | |
| Shiffman et al32 (gum) | 252/2981 | 12/155 | 1.1 (0.6 to 2.0) | 1.4 (0.7 to 2.6) |
| Shiffman et al32 (patch) | 217/2367 | 8/269 | 3.3 (1.6 to 6.7) | 3.6 (1.7 to 7.6) |