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. Author manuscript; available in PMC: 2014 Oct 7.
Published in final edited form as: Am Heart J. 2013 Sep 18;166(4):744–752. doi: 10.1016/j.ahj.2013.06.023

Figure 2.

Figure 2

Receiver-operating characteristic (ROC) curves for predicting sudden cardiac death at 24 months for the multivariable model based on three clinical parameters (presence of coronary artery disease, left ventricle ejection fraction [LVEF] & microvolt T-wave alternans status) versus either LVEF or MTWA as single variables. In the derivation cohort, the area under the ROC curve (c-index) for the multivariate model (0.817) is significantly greater than both LVEF (0.637) and MTWA (0.716) (p < 0.001 for both comparisons). In the validation cohort, the c-index of the model (0.774) is also significantly better than LVEF (0.671, p = 0.020), and non-significantly greater than MTWA as a lone variable (0.729, p = 0.170).