showed a trendP = 0.09
Regarding the length of follow-up, pooled analysis of trials with < 3 years follow-up showed a trend towards more benefit of ICD-only therapy (HR 0.68, 95% CI 0.43–1.06 I 2 = 0%; P = 0.09) versus those with follow-up ≥ 3 years (HR 0.78, 95% CI 0.62–0.99; I 2 = 0%; P = 0.04).