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Table 1 Demographics

From: Reducing the failure rate of hip resurfacing in dysplasia patients: a retrospective analysis of 363 cases

  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
  1. aDied with the causes unrelated to their hip arthroplasties
  2. bStatistically significant