Table 5.

Analysis of covariance.

Variable		Dataset with missing values	Pooled dataset
Gender	Female	n = 20	n = 34
	Male	n = 13	n = 28
Side	Left	n = 16	n = 31
	Right	n = 17	n = 31
Diagnosis	Osteoarthritis	n = 28	n = 49
	Hip dysplasia	n = 4	n = 7
	Avascular necrosis	n = 1	n = 4
	Femoral neck fracture	n = 0	n = 2
CCD angle	Varus < 120°	n = 1	n = 5
	Physiological 120°–135°	n = 25	n = 44
	Valgus > 135°	n = 7	n = 13
Friction pairings	Ceramic-ceramic	n = 20	n = 42
	Mixture	n = 13	n = 20