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Table 4 Number of patients requiring rescue analgesic

From: A comparative study of buprenorphine in two different doses as an adjuvant to levobupivacaine in US-guided lumbar plexus block for postoperative analgesia

Variable Group L (n = 30) Group BL (n = 30) Group BH (n = 30) P value
0 h 0 0 0
1 h 0 0 0
2 h 0 0 0
4 h 16 0 0 < 0.001
6 h 14 0 0 < 0.001
12 h 23 28 25 .206
18 h 16 7 8 .027
24 h 24 18 7 < 0.001
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