Table 6.

 Examples of sensitivity and specificity of various cut off values for predicting cardiac death within eight years from each measurement

Parameter	Cut off value	Sensitivity (%)	Specificity (%)	Area under ROC curve
QTcmax (ms)
Baseline	475	89	42	0.71
Baseline	480	65	50	–
3 years	470	90	57	0.80
3 years	480	79	70	–
3 years	490	58	75	–
6 years	480	92	59	0.84
QTc, 6 years (ms)	510	83	85	0.70
ABPI ratio, 3 years	1.16	71	50	–
RR ratio
6 years	1.13	83	53	0.72
6 years	1.19	67	75	0.79
QTcmax (ms) and ABPI ratio, 3 years	495/1.18	73	63	0.90
QTcmax (ms) and RR ratio, 6 years	503/1.05	83	75	–

ROC, receiver operating characteristic.