Table 3.
Unadjusted hip fracture outcomes by hospital case volume
| High volume | Intermediate-high volume | Intermediate-low volume | Low volume | Total cohort | p Value | |
|---|---|---|---|---|---|---|
| Median time to theatre (days) | 1.0 (IQR 0.0–2.0) | 1.0 (0.0–1.0) | 1.0 (1.0–2.0) | 1.0 (1.0–2.0) | 1.0 (0.0–2.0) | <0.001* |
| Median length of stay (days) | 4.0 (IQR 4.0–6.0) | 5.0 (4.0–6.0) | 5.0 (4.0–7.0) | 6.0 (4.0–8.0) | 5.0 (4.0–6.0) | <0.001* |
| Discharge destination | ||||||
| Home | 749 (4.5%) | 2060 (4.4%) | 1610 (6.3%) | 99 (12.5%) | 4518 (5.1%) | |
| Short-term hospital | 38 (0.2%) | 186 (0.4%) | 239 (0.9%) | 10 (1.3%) | 473 (0.5%) | |
| Skilled nursing facility | 14 431 (86.7%) | 39 992 (86.3%) | 21 255 (83.4%) | 617 (77.9%) | 76 295 (85.5%) | |
| Home healthcare | 1423 (8.6%) | 4089 (8.8%) | 2361 (9.3%) | 66 (8.3%) | 7939 (8.9%) | |
| Against medical advice | 7 (0.0%) | 21 (0.1%) | 22 (0.1%) | 22 (0.1%) | 7 (0.0%) | <0.001† |
| In-hospital mortality | 313 (1.8%) | 886 (1.9%) | 450 (1.7%) | 14 (1.7%) | 1663 (1.8%) | 0.585† |
| Unplanned readmission | 1987 (11.9%) | 4971 (10.7%) | 2829 (11.0%) | 101 (12.6%) | 9888 (11.0%) | <0.001† |
| Postoperative sequelae | ||||||
| All | 1650 (9.7%) | 5046 (10.6%) | 2727 (10.5%) | 90 (11.0%) | 9513 (10.4%) | <0.001† |
| VTE | 400 (2.6%) | 1262 (2.7%) | 515 (2.0%) | 17 (2.1%) | 2194 (2.4%) | <0.001† |
| Decubitus ulcers | 1029 (6.1%) | 3274 (6.9%) | 1874 (7.2%) | 60 (7.3%) | 6237 (6.8%) | <0.001† |
| Pneumonias | 320 (1.9%) | 951 (2.0%) | 575 (2.20%) | 20 (2.5%) | 1866 (2.0%) | <0.001† |
*Kruskall-Wallis one-way analysis of variance.
†χ2 Test.
VTE, venous thromboembolism.