Methodological qualities of trials included in our review
| Quality variable | Huang et al. (14) | Lau et al. (15) |
|---|---|---|
| Inclusion criteria | Listed | Listed |
| Exclusion criteria | Listed | Listed |
| Randomization technique | Computer-based | Computer-based |
| Sample size calculation | Not stated | Not stated |
| Baseline comparable | Listed | Listed |
| Masked/blinded | Not stated | Stated |
| Cross-over | Stated | Not stated |
| Lost to follow-up | None | None |
| Allocation concealment | Not stated | Stated |
| Analysis by intention to treat | Not stated | Not stated |