Table 1.

Average wear rates per month [μm]

	Time	N	Mean	SD	Median	95% CI	IQR
LS2	1 year	24	9.46	4.31	8.67	7.63/11.28	4.56
	2 years	24	5.47	3.29	4.44	4.08/6.86	2.84
COMP	1 year	21	24.76	13.32	24.92	18.69/30.82	24.50
	2 years	18	16.23	10.72	13.61	10.89/21.56	12.97