Bilateral posterior Quadratus Lumborum block for pain relief after cesarean delivery: a randomized controlled trial

Table 2 Cumulative morphine use (mg) and cumulative morphine demands at the 2nd interim analysis

	IT morphine (n = 20)	IT morphine with QLB (n = 18)	QLB (*n =* 20)	p-value
PCA morphine delivery (1 dose = 1 mg)
24 h	5.5 (0–25)	5 (0–36)	16.5 (1–44)	0.001^a
48 h	5.5 (0–37)	6 (0–40)	20 (1–46)	0.006^b
PCA morphine demand
24 h	5.5 (0–38)	5 (0–37)	19 (2–65)	< 0.001^a
48 h	5.5 (0–42)	6 (0–39)	22.5 (2–67)	0.003^a

Data presented as median and range (min, max). Kruskal-Wallis with Dunn’s post hoc test with significances indicated by: a, both Group IT and IT+QLB vs. QLB, p < 0.05, b, IT vs. QLB, p < 0.05.
Abbreviations: IT intrathecal, QLB quadratus lumborum block, PCA patient-controlled analgesia

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