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Randomized Controlled Trials
| Study | Randomization | Allocation Concealment | Blinding | Baseline Imbalance | % Lost to F/U | Source of Funding |
|---|---|---|---|---|---|---|
| Castelo-Branco, 2001 [20] | Yes, method NR | NR | NR | NR | 24 | NR or unclear |
| Gibson, 1999 [21] | Yes, method NR | NR | OCP group had no blinding, the other 2 groups had double blinding | NR | NR | NR or unclear |
| Warren, 2003 [22] | Yes, method NR | NR | NR | NR | NR | NIH funded, but pharmaceutical company donated medications |
