Table 2

Sensitivity analyses

	Pooled results of the remaining studies		Heterogeneity of the remaining studies
Exclusion of studies	SMD	p Value	I² (%)	p Value
Mean VAS pain score for 24 hours postoperatively
Total hip arthroplasty	−0.47 (−0.80, −0.14)	0.005	69	0.004
Mixed with epinephrine	−0.58 (−0.96, −0.19)	0.003	79	<0.001
Poor methodological quality	−0.67 (−1.04, −0.30)	<0.001	64	0.03
Mean VAS pain score for 24–48 hours postoperatively
Total hip arthroplasty	−0.02 (−0.26, 0.22)	0.86	0	0.52
Poor methodological quality	−0.07 (−0.28, 0.14)	0.52	1	0.39
Narcotic use for 24 hours postoperatively
Total hip arthroplasty	−0.32 (−0.58, −0.05)	0.02	59	0.02
Mixed with epinephrine	−0.24 (−0.49, −0.01)	0.06	52	0.05
Poor methodological quality	−0.39 (−0.68, −0.09)	0.01	53	0.06
Injection 24 hours postoperatively	−0.17 (−0.32,−0.02)	0.03	40	0.11
Adverse effects
Total hip arthroplasty	0.72 (0.21, 2.43)	0.59	86	<0.001
Mixed with epinephrine	0.99 (0.59, 1.66)	0.97	83	<0.001
Poor methodological quality	0.85 (0.40, 1.80)	0.68	87	<0.001