Table 1.
Demographic characteristics
| Fracture group | Control group | |
|---|---|---|
| N = 32,094 | N = 131,092 | |
| Sex, n (%) | ||
| Male | 3090 (9.6) | 11,170 (8.5) |
| Female | 29,004 (90.4) | 119,922 (91.5) |
| Mean (SD) age, years | 75.2 (11.7) | 66.4 (10.4) |
| US geographic region, n (%) | ||
| Northeast | 4277 (13.3) | 19,929 (15.2) |
| North central | 11,312 (35.2) | 35,462 (27.1) |
| South | 9954 (31.0) | 46,908 (35.8) |
| West | 6484 (20.2) | 28,382 (21.7) |
| Unknown | 67 (0.2) | 411 (0.3) |
| Health plan type, n (%) | ||
| Comprehensive | 12,797 (39.9) | 31,613 (24.1) |
| PPO | 12,694 (39.6) | 63,376 (48.3) |
| POS | 1322 (4.1) | 9101 (6.9) |
| HMO | 4220 (13.1) | 19,740 (15.1) |
| Other | 382 (1.2) | 3458 (2.6) |
| Unknown | 679 (2.1) | 3804 (2.9) |
| Index fracture type, n (%) | ||
| Hip | 8147 (25.4) | |
| Vertebral | 10,608 (33.1) | |
| Nonhip/nonvertebral | 13,339 (41.6) | |
HMO health maintenance organization, POS point of service, PPO preferred provider organization