Table 4.

Outcomes of meta-analyses of complications.

Complications	Studies	RR (95% CI)	P	I 2
PENG block vs sham/no block	INS
PENG block vs SFIB
PONV	4	1.28 (0.70; 2.34)	0.54	0%
Urinary retention	2	3.25 (0.52; 20.29)	0.2066	0%
Respiratory depression	2	-	-	-
Pruritus	2	0.96 (0.26; 3.55)	0.946	0%
Puncture complications	2	-	-	-
PENG block vs PAI
PONV	4	0.73 (0.39; 1.38)	0.3379	30%
Urinary retention	2	2.9 (0.31; 27.11)	0.3501	0%
Respiratory depression	2	-	-	-
Pruritus	3	1.57 (0.37; 6.63)	0.5427	0%
Puncture complications	1	-	-	-

INS, insufficient data for meta-analysis; PAI, the periarticular anesthetic infiltration; PENG, the pericapsular nerve group block; PONV, postoperative nausea and vomiting; SFIB, the suprainguinal fascia iliaca block; RR, relative risk; CI, confidence interval.