Beta-blockers, when compared to placebos in a meta-analysis of 12 studies, showed a risk decrease from 25% placebo to 15% BB.Absolute Risk Reduction ARR = 9.0, 2-15%, NNT = 11 without significant decrease of mortality ARR = 4%, 0-9%, NNT = 25, p =0.10.
RAR: 9, 2-15% NNT: 11 sin una disminución significativa de la mortalidad RRA: 4%, 0-9%: NNT 25, p = 0,10.