Does Metal Transfer Differ on Retrieved Ceramic and CoCr Femoral Heads?

Table 1

Patient demographics were similar between the three cohorts with the exception of patient age. All data is reported as median, IQR, with the exceptions of gender (reported as percent female).

	CoCr-on-polyethylene femoral heads	Ceramic-on-polyethylene; femoral heads	Ceramic-on-ceramic; femoral heads	value
Age (years)	57 (16.0)	53 (15.3)	49 (11.4)	0.02
Gender (% female)	50%	37%	27%	0.21
Body mass index (kg/m^2)	29.1 (11.7)	28.2 (11.9)	30.7 (7.3)	0.54
Weight (kg)	185 (71.5)	189 (75.0)	200 (82.8)	0.37
Head size [median]; (mm)	32 (8.0)	32 (4.0)	32 (0.0)	0.47
Max UCLA activity score	6 (4)	6 (3)	6 (3)	0.64
Implantation time (years)	1.9 (2.7)	2.1 (4.4)	1.7 (1.4)	0.77