Table 2.

Cumulative postoperative opioid consumption presented as mean (95% CI) in intravenous morphine milligram equivalents

	LPB (n=50)	QLB (n=53)	Difference (QLB-LPB)	P value*
0–8 hours	8.68 (6.62, 10.7)	11.3 (8.89, 13.7)	2.63 (−0.56, 5.82)	0.715
0–12 hours	12.7 (10.2, 15.1)	15.9 (12.7, 19.2)	3.27 (−0.82, 7.35)	0.625
0–24 hours	23.8 (20.2, 27.3)	26.6 (21.1, 32.1)	2.83 (−3.70, 9.37)	0.279

^*P values reported are for the test of non-inferiority using a one-sided two-sample t-test approach and assuming a non-inferiority margin of no more than a 20% increase relative to LP (which equates to 1.7, 2.5, and 4.8 intravenous morphine milligram equivalents for 8, 12, and 24 hours).

LPB, lumbar plexus block; QLB, quadratus lumborum block.