Fig. 5From: Calf circumference predicts frailty in older adults: the Chinese longitudinal healthy longevity surveyROC curve analysis of CC for frailty in women. AUC = 0.732 (95% CI: 0.691–0.772; P < 0.001); CC cut-off point in women = 28.5 cm; Youden index = 0.365; Sensitivity: 66.8%; Specificity: 69.7%Back to article page