Table 3.
Secondary outcomes
| LPB (n=50) | QLB (n=53) | P Value* |
|
|---|---|---|---|
| VAS pain scores (mm), mean (95% CI)† | |||
| Preoperative holding | 33.1 (24.7 to 41.5) | 28.5 (21.2 to 35.8) | 0.415 |
| PACU | 15.7 (8.69 to 22.8) | 25.8 (18.9 to 32.6) | 0.372 |
| 24 hours postoperative | 39.1 (31.9 to 46.3) | 40.1 (33.2 to 47.0) | 0.999 |
| NRS pain scores mean (95% CI)† | |||
| 0–2 hours postoperative | 1.74 (1.08 to 2.39) | 2.73 (2.08 to 3.38) | 0.242 |
| 2–4 hours postoperative | 2.98 (2.05 to 3.91) | 4.30 (3.38 to 5.21) | 0.134 |
| 4–6 hours postoperative | 4.29 (3.39 to 5.21) | 5.95 (4.97 to 6.93) | 0.102 |
| 6–8 hours postoperative | 5.06 (4.09 to 6.02) | 5.80 (4.73 to 6.87) | 1.000 |
| 8–12 hours postoperative | 5.77 (4.88 to 6.66) | 6.09 (5.22 to 6.97) | 1.000 |
| 12–18 hours postoperative | 5.97 (5.13 to 6.81) | 5.77 (4.93 to 6.60) | 1.000 |
| 18–24 hours postoperative | 6.27 (5.47 to 7.07) | 5.33 (4.48 to 6.17) | 0.774 |
| PACU | |||
| Anterior thigh numbness, n (%) | 43 (86.0) | 35 (66) | 0.018 |
| Lateral thigh numbness, n (%) | 41 (82) | 36 (67.0) | 0.100 |
| Quadricep strength, n (%) | 0.001 | ||
| 1 | 46 (92.0%) | 35 (66.0%) | |
| 2 | 4 (8.0%) | 13 (24.5%) | |
| 3 | 0 (0.0%) | 3 (5.7%) | |
| 4 | 0 (0.0%) | 2 (3.8%) | |
| 5 | 0 (0.0%) | 0 (0.0%) | |
| Block duration (hours), median (95% CI)‡ | 11.1 (9.97 to 13.4) | 8.10 (6.75 to 9.93) | 0.034 |
| Maximum distance ambulated (feet), median (95% CI)‡ | 107.5 (75 to 150) | 120 (72 to 180) | 0.744 |
*
P values reported are for test of differences.
†
CIs for VAS and NRS pain scores were estimated from a linear mixed model of pain scores over time controlling for preoperative VAS pain scores. All p values were Bonferroni adjusted for multiple pairwise comparisons.
‡
Distribution free CIs for the median were determined using the Hahn and Meeker approach.27
LPB, lumbar plexus block; NRS, Numeric Rating Scale; PACU, postoperative anesthesia care unit; QLB, quadratus lumborum block; VAS, Visual Analog Scale.