Table 3.
Receiver Operator Characteristic (ROC) Results for the Classification of Prefrailty and Frailty on the Mod-FP Compared With the FFP, Based on Time Between Visits (Within 30 days and Beyond 30 days)
| Sample | ROC AUC (95% CI) | Cut point (Mod-FP Score) | Sensitivity | Specificity | Correctly Classified |
|---|---|---|---|---|---|
| Visits within 30 days—Frail classification | 0.935 (0.899–0.971) | ≥1 | 100% | 54% | 58% |
| ≥2 | 90% | 82% | 83% | ||
| ≥3 | 63% | 97% | 95% | ||
| ≥4 | 27% | 100% | 95% | ||
| Visits within 30 days—Prefrail classification | 0.883 (0.852–0.914) | ≥1 | 82% | 92% | 87% |
| ≥2 | 35% | 100% | 66% | ||
| ≥3 | 6% | 100% | 52% | ||
| Visits beyond 30 days—Frail classification | 0.936 (0.887–0.985) | ≥1 | 100% | 64% | 69% |
| ≥2 | 87% | 86% | 86% | ||
| ≥3 | 60% | 96% | 92% | ||
| ≥4 | 27% | 100% | 91% | ||
| Visits beyond 30 days—Prefrail classification | 0.770 (0.697–0.844) | ≥1 | 60% | 92% | 75% |
| ≥2 | 27% | 100% | 62% | ||
| ≥3 | 7% | 100% | 51% |
Note. AUC = area under curve; FFP = Fried’s frailty phenotype; Mod-FP = modified Fried phenotype; PWH = people with HIV.