Fig. 3From: Validation of the questionnaire for medical checkup of old-old (QMCOO) score cutoff to diagnose frailty The ROC curve and cutoff for the diagnosis of prefrailty A. Correlation between KCL score and QMCOO score in the non-frail participants. p < 0.001 is considered significant B. The ROC curve was used to determine the cutoff for a diagnosis of frailty according to the QMCOO scoreBack to article page