Table 2.

Patient characteristics with and without osteolysis

Variable	Osteolysis		p Value
	Absent (n = 85)	Present (n = 13)
Gender, male	45 (53%)	7 (54%)	0.95
Operative side, right	48 (56%)	8 (62%)	0.73
Lysis on CT	47 (55%)	1 (8%)	0.001
Age at surgery (years)	45.2 ± 7.6	42.0 ± 8.0	0.15
Body mass index (kg/m2)	28.6 ± 6.0	26.7 ± 5.1	0.29
Followup (years)	6.95 ± 1.6	8.64 ± 1.3	0.0006
UCLA preoperative	3.98 ± 1.8	3.92 ± 1.6	0.99
UCLA change	1.75 ± 2.2	2.17 ± 2.2	0.28
Harris Hip preoperative	50.4 ± 14	49.7 ± 14	0.88
Harris Hip change	33.6 ± 18	34.3 ± 21	0.95
Head penetration
Value in mm	0.27 ± 0.73	1.40 ± 1.20	0.04*
Value < 0	47 (57%)	1 (8%)	0.002
Head penetration rate (mm/year)	0.07 ± 0.08	0.17 ± 0.12	0.03*
Head size
Value	27.5 ± 1.3	26.8 ± 1.0	0.01*
Value ≤ 26	22 (26%)	8 (62%)	0.02*
Anteversion	16.8 ± 6.9	15.3 ± 7.6	0.49
Inclination	46.0 ± 7.6	46.8 ± 7.5	0.72

* p-Value calculated using Wilcoxon's test.