Table 2.
Development of frailty score based on the ROC curve analysis and the Cox proportional hazards model
| Domain | Indicator | ROC curve analysis | Cox proportional hazards model | Score | ||
|---|---|---|---|---|---|---|
| AUC (95% CI) | Cut‐off | Coefficient (95% CI) | P | |||
| Weakness | Grip strength | Men: 0.61 (0.58–0.65) Women: 0.62 (0.57–0.66) | Men: <30.0 kg Women: <17.5 kg | 0.53 (0.34–0.72) | <0.001 | 5 |
| Slowness | Walking speed | 0.63 (0.60–0.65) | <0.98 m/s | 0.39 (0.18–0.59) | <0.001 | 4 |
| Physical inactivity | SEW‐7 | 0.62 (0.59–0.64) | ≤20 points | 0.27 (0.05–0.48) | 0.004 | 3 |
| Exhaustion | PMADL‐8 | 0.60 (0.58–0.63) | ≥21 points | 0.17 (−0.02–0.36) | 0.081 | 2 |
| Weight loss | BMI | 0.54 (0.52–0.57) | <20.8 kg/m2 | — | — | — |
AUC, area under the curve; BMI, body mass index; CI confidence interval; ROC, receiver operating characteristic; PMADL‐8, Performance Measure for Activities of Daily Living‐8; SEW‐7, Self‐Efficacy for Walking‐7.