Table 1 Demographics

 MALE

35 (29 %)

64 (26 %)

0.6171

 FEMALE

86 (71 %)

178 (74 %)

 DECEASED^a

3 (2.5 %)

1 (0.4 %)

0.0751

 Follow-up Mean Years

6.4 ± 2.31

2.6 ± 1.51

<0.0001^b

 Case Date Range

1/2001–7/2008

7/2008–7/2013

--

 Age (yr)

48 ± 8.37

52 ± 7.05

<0.0001^b

 BMI

26 ± 5.04

26 ± 5.08

1.000

 T-score

−0.34 ± 1.44

−0.40 ± 1.10

0.6599

 Overall Failures (no. of hips)

16 (13.2 %)

2 (0.8 %)

<0.0001^b

 2-Year Raw Failures (no. of hips)

8 (6.6 %)

2 (0.8 %)

0.0015^b

 7-Year Survivorship (no. of hips)

108 (89.3 %)

240 (99.2 %)

<0.0001^b

 Dysplasia I

37/51 (73 %)

188/241 (78 %)

0.4009

 Dysplasia II

10/51 (20 %)

49/241 (20 %)

0.9045

 Dysplasia III

0/51 (0 %)

0/241 (0 %)

1.000

 Dysplasia IV

0/51 (0 %)

0/241 (0 %)

1.000

 Dysplasia Osteotomy

4/51 (7.8 %)

4/241 (1.7 %)

0.0139^b

 Grade Unrecorded

70/121 (58 %)

1/242 (0.4 %)

<0.0001^b

 ASA Score

1.6 ± 0.55

1.6 ± 0.56

1.000

 Femoral Component <48 mm (no. of hips)

46/121 (38 %)

79/242 (33 %)

0.3077

 Femoral Component Size

48.1 ± 3.45

47.0 ± 2.91

0.0016^b