Table 3.
Quantitative results
| Time-to-event outcomes | Studies included | DeA | DeM | Risk ratios or weighed mean (95% CI) | P value for statistical significance | P value for heterogeneity | I2 test for heterogeneity | ||
|---|---|---|---|---|---|---|---|---|---|
| N | Mean or n/N | N | Mean or n/N | ||||||
| Sensory block onset (min) | [14–17] | 132 | 12.8 | 133 | 12.66 | 0.4 (− 1.24, 2.04) | 0.64 | 0.04 | 64% |
| Sensory block duration (min) | [14, 15, 17, 18] | 128 | 656.15 | 126 | 707.52 | − 9.55 (− 186.07, 166.98) | 0.92 | < 0.01 | 91% |
| Motor block onset (min) | [14, 16] | 55 | 9.47 | 56 | 8.78 | 0.67 (0.03, 1.32) | 0.04 | 0.97 | 0 |
| Motor block duration (min) | [14, 17] | 81 | 634.49 | 79 | 570.96 | 61.85 (− 178.16, 301.86) | 0.61 | < 0.01 | 96% |
|
Fentanyl consumption (mcg) |
[16, 19] | 50 | 126.5 | 50 | 138.665 | − 29.12 (− 45.18, − 13.06) | < 0.01 | 0.43 | 0 |
| Postoperative nausea | [14–16, 18, 19] | 122 | 7/122 | 123 | 4/123 | 1.6 (0.24, 10.83) | 0.62 | 0.21 | 38% |
| Postoperative vomiting | [14–16, 18, 19] | 122 | 8/122 | 123 | 2/123 | 3.89 (0.88, 17.16) | 0.08 | 0.76 | 0 |
DeA dexamethasone, min minute, DeM dexmedetomidine, CI confidence interval