TABLE 2.
Quality of studies included in the present meta-analysis
| Study | Procedure | Randomization method described | Allocation concealment | Double-blinded | Drop-outs accounted | Jadad score* |
|---|---|---|---|---|---|---|
| Gynecological procedures | ||||||
| Dierking et al (34) | Abdominal hysterectomy | + | + | + | + | 5 |
| Gilron et al (35) | Abdominal hysterectomy | + | + | + | + | 5 |
| Rorarius et al (29) | Vaginal hysterectomy | + | – | + | + | 5 |
| Turan et al (31) | Abdominal hysterectomy | + | + | + | + | 5 |
| Turan et al (41)* | Abdominal hysterectomy | + | + | + | + | 5 |
| Yoon et al (26) | Abdominal hysterectomy | – | – | + | + | 4 |
| Orthopedic procedures | ||||||
| Menigaux et al (38) | Knee surgery | + | – | + | + | 5 |
| Pandey et al (28) | Spine surgery | + | – | – | – | 2 |
| Pandey et al (39) | Spine surgery | + | – | + | + | 5 |
| Radhakrishnan et al (37) | Spine surgery | + | + | + | – | 4 |
| Tuncer et al (40) | Major orthopedic surgery | – | – | – | – | 1 |
| Turan et al (32) | Spine surgery | + | + | + | + | 5 |
| Turan et al (42) | Lower limb surgery | + | + | + | + | 5 |
| Other procedures | ||||||
| Dirks et al (25) | Breast surgery | + | + | + | + | 5 |
| Fassoulaki et al (24)† | Breast surgery | + | + | + | + | 5 |
| Pandey et al (33) | Laparoscopic cholecystectomy | + | – | + | – | 4 |
| Pandey et al (36) | Open nephrectomy | + | – | + | + | 5 |
| Turan et al (30) | Ear-nose-throat surgery | + | + | + | + | 5 |
| Proportion meeting quality criteria, % | 89 | 56 | 89 | 78 | ||
*
See reference 68 for details. + Information present; – Information absent