Table 2.

Diagnostic accuracy based on the area under the curve (AUC) values with 95% confidence intervals (CI) for the Clinical Frailty Scale (CFS), Programme of Research to Integrate Services for the Maintenance of Autonomy 7 (PRISMA-7) tool, and the Identification of Seniors at Risk (ISAR) tool for separating frail and non-frail based on (1) the comprehensive geriatric assessment (CGA), (2) FRAIL scale, and (3) Groningen Frailty Indicator (GFI) frailty classification approaches.

Frailty Classification Approach	CGA AUC (with 95% CI)	FRAIL Scale AUC (with 95% CI)	GFI AUC (with 95% CI)
Instrument
CFS	0.83 (0.77–0.88)	0.68 (0.61–0.76)	0.81 (0.75–0.86)
PRISMA-7	0.88 (0.83–0.93)	0.79 (0.74–0.85)	0.82 (0.77–0.87)
ISAR	0.78 (0.71–0.84)	0.74 (0.67–0.80)	0.77 (0.71–0.82)