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Additional contributions of ECG-age on each outcome in validation set. Cox proportional hazard model and C-index are used as the performance assessment for a series of models. The model 1 includes significant demographic data selected by stepwise program for each outcome, the model 2 includes variables in model 1 and additional significant comorbidities, and the model 3 includes variables in model 2 and additional significant laboratory tests. #p < 0.05; ##p < 0.01; ###p < 0.001.
