Table 1.
General characteristics of the cohort
| Characteristic | Intramedullary nail (n = 2831) | Sliding hip screw (n = 40,828) | Overall (n = 43,659) |
|---|---|---|---|
| Gender | |||
| Male (number/%) | 657 (23.2%) | 8930 (21.9%) | 9587 |
| Female | 2174 (76.8%) | 31,898 (78.1%) | 34,072 |
| Age | |||
| 65–69 years | 130 (4.6%) | 1485 (3.6%) | 1615 |
| 70–74 years | 248 (8.8%) | 3369 (8.3%) | 3617 |
| 75–79 years | 425 (15.0%) | 6388 (15.7%) | 6813 |
| 80–84 years | 9566 (23.4%) | 663 (23.4%) | 10,229 |
| 85–89 years | 717 (25.3%) | 10,792 (26.4%) | 11,509 |
| ≥ 90 years | 648 (22.9%) | 9228 (22.6%) | 9876 |
| Mean (years) | 83.6 | 83.8 | |
| Race | |||
| White | 2651 (93.6%) | 38,468 (94.2%) | 41,119 |
| Nonwhite | 180 (6.4%) | 2360 (5.8%) | 2540 |
| Nature of region | |||
| Urban* | 1826 (64.9%) | 23,414 (58.1%) | 25,240 |
| Large town* | 566 (20.1%) | 9594 (23.8%) | 10,160 |
| Small town/isolated* | 420 (18.1%) | 7313 (14.9%) | 7733 |
| Hospital hip fracture volume | |||
| < 250 cases* | 628 (22.2%) | 9759 (23.9%) | 10,387 |
| 250–630 cases* | 1446 (50.0%) | 21,018 (51.5%) | 22,464 |
| > 630 cases* | 757 (26.8%) | 10,051 (24.6%) | 43,659 |
| Reason for medicare eligibility | |||
| Medicaid | 552 (19.5%) | 7686 (18.8%) | 8238 |
| Disabled (reason for Medicare eligibility) | 188 (6.6%) | 2628 (6.4%) | 2816 |
| Number of Iezzoni comorbidities | |||
| 0 | 1343 (47.4%) | 19,270 (47.2%) | 20,613 |
| 1 | 868 (30.7%) | 12,740 (31.2%) | 13,608 |
| 2 | 402 (14.2%) | 5779 (14.2%) | 6181 |
| 3+ | 218 (7.7%) | 3039 (7.4%) | 3257 |
* Statistical tests for univariate difference based on Mantel-Hanzel chi square with p < .05. Grouped variables (eg, age) were evaluated across all strata at once to test for any difference between IMN and SHS populations.