Table 4.

Revision after THA in patients 30 years of age and younger

Reason for revision	Group I	Percent	Group II	Percent	Total	Percent	p value
Loosening	46	70.7	24	48.0	70	60.9
Infection	8	12.3	4	8.0	12	10.4
Instability	0	0	6	12.0	6	5.2
Lysis	1	1.5	1	2.0	2	1.7
Wear	2	3.1	12	24.0	14	12.2
Periprosthetic fracture	2	3.1	0	0	2	1.7
Acetabular component fracture	2	3.1	0	0	2	1.7
Femoral component fracture	4	6.2	0	0	4	3.5
Liner fracture	0	0	1	2.0	1	0.86
Acetabular component protrusio	0	0	1	2.0	1	0.86
Impingement	0	0	1	2.0	1	0.86
Total	65		50		115
Overall revision rate	19.6		12.3		15.6		0.007