Table 4.
Area under receiver operating characteristic curves (AUCs) for 30-day all-cause re-hospitalization
| Models | Predictors | Development cohort | Validation cohort | |
|---|---|---|---|---|
| AUCs (95% CI) | H-L test* | AUCs (95% CI) | ||
| 1 | Age (spline), gender, race/ethnicity, marital status, Medicare and Medicaid dual eligibility | 0.553 (0.548–0.559) |
0.21 | 0.555 (0.547–0.563) |
| 2 | Model 1 + Charlson index (log-transformed,spline) |
0.583 (0.577–0.588) |
0.08 | 0.585 (0.577–0.594) |
| 3 | Model 2 + length of index hospital stay (5 categories), No. of any hospitalizations within 6 months before index hospitalization |
0.607 (0.601–0.612) |
0.56 | 0.608 (0.600–0.616) |
| 4 | Model 3 + depression severity | 0.621 (0.615–0.626) |
0.41 | 0.619 (0.611–0.627) |
| 5 (Final model) |
Model 4 + physical limitations | 0.626 (0.620–0.632) |
0.15 | 0.625 (0.617–0.633) |
| 6 | No facility-level factor met the selection criteria | NA | NA | NA |
*
H-L test: Hosmer and Lemeshow test (p >0.05 indicating good calibration)