Table 1.
Calculation of Jadad score to assess study quality1.
| Criterion | Score |
|---|---|
| If study was described as randomized (this includes words such as randomly, random, and randomization) | 0/1 |
| If the method used to generate the sequence of randomization was described and was appropriate (table of random numbers, computer-generated, etc.) | 0/1 |
| Deduct one point if the method used to generate the sequence of randomization was described and it was inappropriate (patients were allocated alternately, or according to date of birth, hospital number, etc.) | 0/–1 |
| If the study was described as double blind | 0/1 |
| If the method of double blinding was described and was appropriate (identical placebo, active placebo, dummy, etc.) | 0/1 |
| Deduct one point if the study was described as double blind but the method of blinding was inappropriate (e.g. comparison of tablet versus injection with no double dummy.) | 0/–1 |
| If there was a description of withdrawals and dropouts | 0/1 |
1Adapted from Jadad et al. (40).