Table 5.

Meta-analysis results of complications

Outcome	Groups (n)		Studies (n)	Overall effect
	MIS	Conv		Effect estimate	95% CI	p-value
Iatrogenic nerve palsy	650	650	13	5.27	2.55, 10.91	<0.0001
Transient lateral femoral cutaneous nerve injury	148	127	3	16.18	2.24, 116.71	0.006
Haematoma formation	270	201	4	2.48	0.85, 7.21	0.09
Sciatic nerve palsy	160	195	3	4.38	0.70, 27.20	0.11
Wound complication	112	141	3	2.99	0.62, 14.35	0.17
Deep vein thrombosis	529	509	9	0.49	0.18, 1.35	0.17
Dislocation	929	918	16	0.65	0.33, 1.26	0.20
Intraoperative fracture	563	568	10	1.52	0.76, 3.04	0.23
Heterotrophic ossification	85	85	2	0.32	0.05, 2.10	0.24
Acetabular component loosening	316	324	6	2.40	0.52, 10.98	0.26
Periprosthetic fracture	212	223	4	0.67	0.27, 1.69	0.40
Required revision surgery	230	250	5	0.72	0.15, 3.50	0.68
Deep infection	594	540	9	0.82	0.22, 2.97	0.76
Superficial wound infection	620	609	10	l1.08	0.35, 3.37	0.89
Femoral component loosening	222	222	NE	NE	NE	NE

MIS minimally invasive surgery, Conv conventional surgery, CI confidence interval, NE not estimatable