Fig. 3

The area under the ROC curve of PhA and MNA-SF single or combined detection for the screening of sarcopenia (common type). Note: A is the ROC curve for the screening of sarcopenia (common type) by PhA, B is the ROC curve for the screening of sarcopenia (common type) by MNA-SF, C is the ROC curve for combined detection for diagnosis of sarcopenia (common type)，D is the ROC curve for the diagnostic of sarcopenia (common type) by PhA, MNA-SF and the combined detection