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Table 2 Comparison of secondary outcome measures of patients in the three treatment groups

From: Lumbar transversus abdominis plane block: the role of local anesthetic volume and concentration—a pilot, prospective, randomized, controlled trial

Outcome measure 20 ml 0.5% ropivacaine (n = 9) 30 ml 0.33% ropivacaine (n = 10) 40 ml 0.25% ropivacaine (n = 10)
Total PCA morphine use (mg) 65.9 (63) 39.8 (25.2) 43.2 (36.9)
Time in PACU (min) 138.4 (38) 188.2 (54) 154.6 (43)
Satisfaction score 4.3 (3.5) 2.6 (2.5) 1.8 (1.3)
Pain score at rest (at 2 h) 6.1 (2.4) 5.3 (2.4) 5.4 (2.3)
Pain score with knee flexion (at 2 h) 6.7 (2.1) 5.0 (2.0) 4.9 (2.2)
PONV (at 2 h)a 6 (66.7) 3 (30.0) 3 (30.0)
Sedation (at 2 h)a 6 (66.7) 8 (80.0) 7 (70.0)
  1. Data presented as mean (SD) for continuous and count (%) for dichotomous variables. aCategorical outcome.