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Figure 5 Validation of clinical efficacy models in Group A. (A) Regression tree for calculating the probability of suffering critical aortic stenosis (AS) (prob) according to stroke-work loss (SWL), presence or absence of symptoms, and ejection fraction (EF). (B) Cumulative probability of long-term outcome according to SWL and symptomatic status. Patients with critical AS have been excluded. (C) Probability of early and late AS events in patients with impaired left ventricular function (EF < 0.45). p = probability of long-rank test for comparisons between categories.