Pooled results comparing FLACC scores between QLB and non-QLB during the first 24 hr after surgery
| No. of studies | No. of patients | SMD (95% CI) | P value | I2 | Ph value | Egger's P value | |
|---|---|---|---|---|---|---|---|
| QLB vs. non-QLB | |||||||
| 30 min | 10 | 686 | 0.069 (–0.834, 0.971) | 0.882 | 94.1% | < 0.001 | 0.425 |
| 1 hr | 10 | 695 | –0.869 (–1.562, –0.175) | 0.014 | 88.3% | < 0.001 | 0.039 |
| 2 hr | 9 | 518 | –0.378 (–1.554, 0.798) | 0.528 | 93.7% | < 0.001 | - |
| 4 hr | 10 | 698 | –0.664 (–1.407, 0.079) | 0.080 | 89.8% | < 0.001 | 0.431 |
| 6 hr | 9 | 515 | –1.272 (–2.333, –0.210) | 0.019 | 91.0% | < 0.001 | - |
| 12 hr | 10 | 698 | –1.162 (–2.416, 0.091) | 0.069 | 93.4% | < 0.001 | 0.024 |
| 24 hr | 9 | 630 | –0.205 (–1.063, 0.653) | 0.639 | 94.9% | < 0.001 | - |
| QLB vs. CB | |||||||
| 30 min | 5 | 345 | 0.321 (–0.214, 0.855) | 0.240 | 81.0% | < 0.001 | - |
| 1 hr | 5 | 335 | –0.947 (–2.376, 0.483) | 0.194 | 93.0% | < 0.001 | - |
| 2 hr | 4 | 215 | –0.201 (–0.470, 0.068) | 0.143 | 0% | 0.560 | - |
| 4 hr | 5 | 335 | –0.205 (–0.666, 0.256) | 0.384 | 75.1% | 0.003 | - |
| 6 hr | 5 | 286 | –1.927 (–3.768, –0.086) | 0.040 | 94.7% | < 0.001 | - |
| 12 hr | 5 | 335 | –1.307 (–2.997, 0.383) | 0.130 | 91.9% | < 0.001 | - |
| 24 hr | 5 | 335 | –0.333 (–1.128, 0.462) | 0.412 | 92.5% | < 0.001 | - |
| QLB vs. non-CB, non-QLB | |||||||
| 30 min | 6 | 401 | –0.042 (–1.714, 1.629) | 0.960 | 96.4% | < 0.001 | - |
| 1 hr | 6 | 420 | –0.806 (–1.479, –0.133) | 0.019 | 82.2% | < 0.001 | - |
| 2 hr | 5 | 303 | –0.553 (–2.833, 1.726) | 0.634 | 96.8% | < 0.001 | - |
| 4 hr | 6 | 423 | –1.112 (–2.491, 0.267) | 0.114 | 93.3% | < 0.001 | - |
| 6 hr | 4 | 229 | –0.514 (–1.021, –0.007) | 0.047 | 70.5% | 0.017 | - |
| 12 hr | 6 | 423 | –1.057 (–3.043, 0.928) | 0.297 | 94.7% | < 0.001 | - |
| 24 hr | 5 | 355 | –0.089 (–1.747, 1.569) | 0.916 | 96.4% | < 0.001 | - |
Ph is the P value of the heterogeneity test.
FLACC: Face-Legs-Activity-Cry-Consolability Scale, QLB: quadratus lumborum block, CB: caudal block, SMD: standardized mean difference, CI: confidence interval.