RESUMEN
OBJECTIVE: To evaluate the predictive capacity of different frailty scales, as well as the strength of the handgrip, and to determine their relationship with clinical favourable outcomes. PATIENTS AND METHOD: Prospective study of patients admitted to the Geriatric Functional Recovery Unit (GFRU) of the Hospital Central Cruz Roja. The «FRAIL¼ scale, «Clinical Frailty Scale¼ (CFS) and «Fragil-VIG¼ index, and handgrip strength by hydraulic dynamometer were completed on admission. A functional gain was assumed as 20 or more points in the Barthel Index and return to home, as good outcomes at discharge. The discriminative capacity of favourable outcomes for each frailty scale and handgrip strength was analysed by means of ROC curves, calculating the C statistic (area under the curve = AUC). RESULTS: The analysis included 74 patients (median age 82 years; 48.5% women), admitted for stroke recovery (65%), orthopaedic pathology (16%), and other causes (19%). The prevalence of frailty varied between 31% (FRAIL scale), 40% (CFS), and 57.5% («Fragil-VIG¼). Median handgrip strength was 15 Kg in males (interquartile range 11-21), and 9 Kg in females (interquartile range 7-12). At discharge, 51.5% of patients had a functional gain of 20 or more points in Barthel index, and 63% returned to their previous home. The discriminating ability to achieve acceptable functional gain at discharge was good for CFS (AUC = 0.72; 95% CI; 0.60-0.84) and «Fragil-VIG¼ (AUC = 0.72; 95% CI;0.58-0.82), and handgrip strength was the only tool related to return home (AUC = 0.68; 95% CI;0.56-0.81). CONCLUSION: To evaluate frailty on admission to a GFRU contributes to predicting favourable clinical outcomes, but the discriminating capacity of each scale is variable.