Mid-term outcomes of the R3™ delta ceramic acetabular system in total hip arthroplasty

Table 1 Clinical and patient outcomes by follow-up

	Preop	3 months	1 year	3 years	5 years	7 years
WOMAC score
N	173	164	134	124	109	102
Mean	62.6	13.6	8.0	9.3	10.1	9.6
Std	15.5	11.0	11.4	11.9	13.4	11.5
Range	22, 91	0, 57	0, 57	0, 57	0, 61	0, 50
WOMAC physical function score
N	174	164	134	124	110	102
Mean	45.4	10.6	6.4	7.8	8.4	8.3
Standard deviation	10.9	8.4	9.1	10.0	11.1	9.9
Range	12, 65	0, 46	0, 43	0, 46	0, 51	0, 50
WOMAC pain score
N	173	164	134	124	111	102
Mean	12.2	1.7	1.1	1.1	1.3	0.8
Standard deviation	3.7	2.3	2.1	2.3	2.7	1.8
Range	3, 20	0, 11	0, 12	0, 10	0, 13	0, 9
WOMAC stiffness score
N	174	164	134	124	112	102
Mean	5.0	1.3	0.6	0.4	0.7	0.5
Standard deviation	1.9	1.3	1.0	0.9	1.3	1.0
Range	0, 8	0, 6	0, 5	0, 4	0, 8	0, 5
Modified Harris hip score
N	172	166	135	118	113	104
Mean	44.8	83.4	91.0	91.6	92.3	92.0
Standard deviation	12.1	13.5	12.2	12.1	11.1	11.1
Range	10, 87	25, 100	42, 100	43, 100	54, 100	46, 100
UCLA activity rating scale score
N	175	167	134	124	112	102
Mean	3.3	5.7	6.2	6.1	5.9	5.8
Std	1.4	1.5	1.4	1.3	1.6	1.5
Range	1, 8	2, 8	2, 8	2,8	2, 8	3, 8

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