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Figure 2 Kaplan-Meier estimates of the cumulative probability of sudden cardiac death (SCD) (A) and non-sudden cardiac death (B) in the groups assigned to receive an implantable cardioverter-defibrillator (ICD) or conventional medical therapy (CONV). For SCD, the overall difference in mortality between the two treatment groups was significant (nominal p < 0.0001), with two-year SCD rates of 4.9% and 12.1% in the ICD and CONV groups, respectively. For non-SCD, the overall difference in mortality between the two treatment groups was not significant (nominal p = 0.32), with two-year non-SCD rates of 7.0% and 4.6% in the ICD and CONV groups, respectively.