Pre-2008, Group 1 (N = 121) | Post-2008, Group 2 (N = 242) | P-value | |
---|---|---|---|
Sex (no. of hips) | |||
MALE | 35 (29 %) | 64 (26 %) | 0.6171 |
FEMALE | 86 (71 %) | 178 (74 %) | |
DECEASEDa | 3 (2.5 %) | 1 (0.4 %) | 0.0751 |
Follow-up Mean Years | 6.4 ± 2.31 | 2.6 ± 1.51 | <0.0001b |
Case Date Range | 1/2001–7/2008 | 7/2008–7/2013 | -- |
Age (yr) | 48 ± 8.37 | 52 ± 7.05 | <0.0001b |
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 %) | <0.0001b |
2-Year Raw Failures (no. of hips) | 8 (6.6 %) | 2 (0.8 %) | 0.0015b |
7-Year Survivorship (no. of hips) | 108 (89.3 %) | 240 (99.2 %) | <0.0001b |
Dysplasia Grade (no. of hips) | |||
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 %) | 0.0139b |
Grade Unrecorded | 70/121 (58 %) | 1/242 (0.4 %) | <0.0001b |
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 | 0.0016b |