Table 2.
Patient parameters
| Parameters | Early dislocations | Late dislocation | Without dislocation | ||||||
|---|---|---|---|---|---|---|---|---|---|
| AL/PE (n = 2/126) |
AL/AL (n = 2/126) |
p value | AL/PE (n = 14/126) |
AL/AL (n = 0/126) |
p value | AL/PE (n = 110/126) |
AL/AL (n = 124/126) |
p value | |
| Age at the most recent followup | |||||||||
| 63 patients < 75 years (number, %) | 2/63 (3.2%) | 2/63 (3.2%) | 0.75 | 1/63 (3.2%) | 0/63 (0%) | 0.66 | 60/63 (92.6%) | 61/63 (96.8%) | 0.66 |
| 63 patients > 75 years (number, %) | |||||||||
| 21 with cognitive or neurologic dysfunction (number, %) | 0/21 (0%) | 0/21 (0%) | NA | 10/21 (47.7%) | 0/21 (0%) | 0.02 | 11/21 (52.3%) | 21/21 (100%) | 0.02 |
| 42 without cognitive or neurologic dysfunction (number, %) | 0/42 (0%) | 0/42 (0%) | NA | 3/42 (7.1%) | 0/42 (0%) | 0.07 | 39/42 (92.9%) | 42/42 (100%) | 0.07 |
| Sex | |||||||||
| 70 men (number, %) | 1/70 (1.4%) | 1/70 (1.4%) | 0.66 | 4/70 (5.7%) | 0/70 (0%) | 0.08 | 65/70 (92.9%) | 69/70 (98.6%) | 0.08 |
| 56 women (number, %) | 1/56 (1.8%) | 1/56 (1.8%) | 0.72 | 10/56 (17.9%) | 0/56 (0%) | 0.04 | 45/56 (80.3%) | 55/56 (98.2%) | 0.04 |
| Cause of osteonecrosis | |||||||||
| 28 alcohol abuse (number, %) | 2/28 (7.1%) | 2/28 (7.1%) | 0.52 | 6/28 (21.4%) | 0/28 (0%) | 0.04 | 20/28 (71.4%) | 26/28 (92.9%) | 0.04 |
| 32 corticosteroid (number, %) | 0/32 (0%) | 0/32 (0%) | NA | 3/32 (9.4%) | 0/32 (0%) | 0.24 | 29/32 (90.6%) | 32/32 (100%) | 0.24 |
| 26 sickle cell disease (number, %) | 0/26 (0%) | 0/26 (0%) | NA | 2/26 (7.7%) | 0/26 (0%) | 0.24 | 24/26 (92.3%) | 26/26 (100%) | 0.24 |
| 40 others (number, %) | 0/40 (0%) | 0/40 (0%) | NA | 3/40 (7.5%) | 0/40 (0%) | 0.16 | 37/40 (92.5%) | 40/40 (100%) | 0.24 |
AL/PE = alumina-on-polyethylene; AL/AL = alumina-on-alumina; NA = not available.