Table 4. Comparison of Mean of Variables Time of Sensory Block, Time of Complete Motor Block, and Analgesia Duration in the Pethidine and Control Groups.
| Parameters | Sample Size | Number of Study | I2, % | SMD (95% CI) | P |
|---|---|---|---|---|---|
| Time of sensory block (dose ≤ 20) | 150 | 3 | 96.2 | -1.72 (-3.78, 0.34) | 0.00 |
| Time of sensory block (dose > 20) | 210 | 4 | 94.3 | 0.05 (-1.11, 1.22) | 0.00 |
| Time of complete motor block (dose ≤ 20) | 100 | 2 | 96.6 | -4.38 (-9.19, 0.44) | 0.00 |
| Time of complete motor block (dose > 20) | - | - | - | - | - |
| Analgesia duration (dose ≤ 20) | 140 | 3 | 97.9 | 7.67 (1.85, 13.49) | 0.00 |
| Analgesia duration (dose > 20) | - | - | - | - | - |
Abbreviation: SMD, standard mean difference (random effects models and fixed effects models).