Fig. 1

The Receiver Operating Characteristic (ROC) curve of cut-off points in MLHFQ physical component and factor 4 of TCM inquiry to predict NYHA function class. A cut-off point with 9.5 in the score of MLHFQ physical component, 1.5 in the score of factor 4 of TCM inquiry and 11.5 in combined both items had the largest diagnostic discriminatory power to distinguish NHYA Fc II and III. (MLHFQphy: physical component of Minnesota Living with Heart Failure Questionnaire)