Table 1 Characteristics of patients with OA, RA, AVN and other diagnoses (2-year cohort)
| Â | Diagnosis (%) or mean (SD) | |||
|---|---|---|---|---|
| Â | RA | OA | AVN | Other |
| Â | (n=162) | (n = 5,339) | (n = 456) | (n=211) |
Agea | 56 (17) | 65 (13) | 57 (17) | 50 (15) |
% women | 65% | 51% | 49% | 66% |
BMI (kg/m2) | 26 (5) | 29 (6) | 27 (6) | 27 (6) |
Age groupsa | Â | Â | Â | Â |
 ≤60 yrs | 45% | 29% | 52% | 72% |
 >60 to 70 yrs | 31% | 31% | 23% | 19% |
 >70 to 80 yrs | 23% | 31% | 19% | 9% |
 >80 yrs | 1% | 9% | 6% | 1% |
BMI (kg/m2) | Â | Â | Â | Â |
 <25 | 46% | 23% | 32% | 40% |
 25 to 29.9 | 33% | 39% | 41% | 31% |
 30 to 34.9 | 13% | 25% | 17% | 22% |
 35 to 39.9 | 6% | 9% | 5% | 5% |
 ≥40 | 2% | 5% | 4% | 2% |
ASA scorea | Â | Â | Â | Â |
 Class I | 5% | 5% | 8% | 15% |
 Class II | 46% | 57% | 49% | 55% |
 Class III | 49% | 36% | 42% | 28% |
 Class IV | 0% | 1% | 1% | 1% |
Implant Fixationa | Â | Â | Â | Â |
 Cemented | 8% | 12% | 12% | 8% |
 Hybrid | 66% | 52% | 48% | 54% |
 Uncemented | 26% | 36% | 41% | 38% |
Deyo-Charlson Index | 1 (1) | 1 (2) | 1 (2) | 1 (2) |
Depression | 7% | 7% | 8% | 4% |
Anxiety | 3% | 4% | 8% | 2% |
Distance Category | Â | Â | Â | Â |
 0 to 100 miles | 43% | 48% | 38% | 36% |
 >100 to 500 miles | 47% | 41% | 49% | 50% |
 >500 miles or non-US | 11% | 11% | 13% | 14% |