Table 5.
Risk of bias in the included studies.
| References | Randomization process | Deviations from intended interventions | Missing outcome data | Measurement of the outcome | Selection of the reported results |
|---|---|---|---|---|---|
| Ibero-Baraibar et al. (32) | L | L | L | L | L |
| Mielgo-Ayuso et al. (33) | L | L | L | L | L |
| Silver et al. (34) | L | H | L | L | L |
| Diepvens et al. (35) | M | L | NA | L | L |
| Barsalani et al. (26) | L | L | NA | L | L |
| Llaneza et al. (27) | L | H | M | L | L |
| Choquete et al. (28) | M | L | L | L | L |
| Llaneza et al. (37) | M | H | M | L | L |
| Llaneza et al. (38) | M | H | M | L | L |
| Orsatti et al. (39) | L | L | H | L | L |
| Aubertin-Leheudre et al. (40) | M | L | M | L | L |
| Hill et al. (41) | M | M | M | L | L |
| Gahreman et al. (42) | L | M | L | L | L |
| Maki et al. (43) | M | L | L | L | L |
| Faghihzadeh et al. (36) | L | L | L | L | L |
L, low risk; M, medium risk (some concerns); H, high risk; NA, no available information for judgment.