Comparison 2. Biphasic levonorgestrel/EE (preparation Beta) versus triphasic levonorgestrel/EE (preparation Gamma).
Outcome or subgroup title | No. of studies | No. of participants | Statistical method | Effect size |
---|---|---|---|---|
1 Discontinuation due to medical reasons after 12 months | 1 | 298 | Peto Odds Ratio (Peto, Fixed, 95% CI) | 1.54 [0.58, 4.09] |