Risk Factors for Periacetabular Osteolysis and Wear in Asymptomatic Patients with Uncemented Total Hip Arthroplasties

Table 4

Periacetabular osteolysis as outcome-proportional odds model.

Variables	Univariable			Multivariable with wear as categ. data <30% and ≥30%
	Odds ratio	95% confidence interval	value	Odds ratio	95% confidence interval	value
Wear (head penetration into the liner in mm)^*	1.4	1.1–1.8	0.002	2.1	1.1–3.9	0.028
Cup age	1.1	0.9–1.2	0.452	1.0	0.9–1.2	0.623
Patient age at time of surgery^*	0.9	0.6–1.4	0.770	1.0	0.7–1.5	0.996
Male versus Female	1.8	1.0–3.1	0.042	1.8	1.0–3.2	0.045
UCLA Activity Score	1.0	0.9–1.2	0.827
Cup type categ.: Romanus HA/Romanus non-HA/other cups	1.1	0.6–2.1	0.649	1.1	0.6–2.1	0.714
Liner ≥ 6 mm versus <6 mm	0.9	0.5–1.7	0.724	1.0	0.5–2.0	0.979
BMI^*	1.0	0.8–1.6	0.931
Anteversion^*	1.3	0.8–2.1	0.383
Inclination^*	1.2	0.9–1.6	0.309

Modelled as continuous variables but presented in units of ten.