Table 2 The performance of baseline PH-FRAT against the actual fall occurrence within the first six months of PH-FRAT assessment
| Â | Risk score cut-off 14 | Risk score cut-off 10 | ||||||
|---|---|---|---|---|---|---|---|---|
PH-FRAT Predicted Falls | Observed Falls | No. of falls | Resident days | Observed Falls | No. of falls | Resident days | ||
Fallers | Non-fallers | Fallers | Non-fallers | |||||
Fallers | 627 | 388 | 2512 | 147,454 | 1626 | 1559 | 5570 | 446,080 |
Non-fallers | 1782 | 3091 | 4975 | 673,298 | 783 | 1920 | 1917 | 374,672 |
Total | 2409 | 3479 | 7487 | 820,752 | 2409 | 3479 | 7487 | 820,752 |
Standard method | ||||||||
 AUROC (95% CI) | 0.57 (0.56–0.59) | 0.61 (0.60–0.63) | ||||||
 Sensitivity (95% CI) | 26.0 (24.3–27.8) | 67.5 (65.6–69.4) | ||||||
 Specificity (95% CI) | 88.8 (87.8–89.9) | 55.2 (53.5–56.9) | ||||||
 PPV (95% CI) | 61.8 (58.7–64.8) | 51.1 (49.3–52.8) | ||||||
 NPV (95% CI) | 63.4 (62.1–64.8) | 71.0 (69.3–72.7) | ||||||
 Youden’s index | 0.148 | 0.227 | ||||||
Event rate method | ||||||||
 SensitivityER (95% CI) | 33.6 (30.3–36.8) | 74.4 (71.9–76.9) | ||||||
 SpecificityER (95% CI) | 82.0 (80.9–83.1) | 45.6 (44.2–47.1) | ||||||
 Youden’s indexER | 0.156 | 0.201 | ||||||