Table 1 Distribution of GJH and patient characteristics (total sample and by joint site)
Total sample and analytic groups | ||||
|---|---|---|---|---|
Total (N = 2146) | Knee (N = 1987) | Hip (N = 1894) | Lumbar spine (N = 1864) | |
Age (years), mean ± SD | 65 ± 11 | 65 ± 11 | 66 ± 10 | 66 ± 10 |
Women, n (%) | 1432 (66.7%) | 1322 (66.5%) | 1237 (65.3%) | 1210 (64.9%) |
African-American, n (%) | 735 (34.3%) | 670 (33.7%) | 624 (33.0%) | 615 (33.0%) |
Body mass index (kg/m2), mean ± SD | 31 ± 7 | 31 ± 7 | 31 ± 7 | 31 ± 7 |
Prior joint injury, n (%) | 461 (21.5%) | 323 (16.3%) | 94 (5.0%) | 44 (2.4%) |