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ROC curve for discriminating HFrEF from CG using log2−delta CT of exo-miR-92b-5p (AUC of 0.844, cutoff value =−6.09, sensitivity =71.4%, specificity =83.3%, P<0.001). ROC, receiver operating characteristic; HFrEF, heart failure with reduced ejection fraction; CG, control group; AUC, area under the curve.
