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Figure 4 U-Shaped Curve for ICD Efficacy

(A) Two-year Kaplan-Meier mortality rates in the ICD and conventional therapy groups; and (B) the corresponding 2-year mortality rate reduction with an ICD, by risk score and in VHR patients. *p < 0.05 for the comparison between the conventional therapy and ICD groups. Abbreviations as in Figure 1.