Table 3.

Receiver operating characteristics analysis for using CPK-MB as marker for echocardiographic parameters of myocardial dysfunctions on day 1 among all patients (n = 80)

Echocardiographic parameters	Cutoffs for CPK-MB (IU/L)	Sensitivity	Specificity	AUC	95% CI (DeLong method)
Left ventricular ejection fraction (<55%)	152	0.79	0.67	0.74	0.54–0.93
Fractional area change (<36%)	105	0.72	0.76	0.76	0.64–0.88
Fractional shortening (<25%)	79	0.43	1.00	0.59	0.26–0.91
E/A ratio (<1)	119	0.66	0.80	0.74	0.57–0.92

AUC, area under curve; 95% CI, 95% confidence interval