Numbers needed to treat (NNT) för att undvika 1 utfall = 1/ARR 1/0,033 = 30,3 Risk ratio (RR) = EER/CER 0,082/0,115 = 0,71 Absolute risk reduction (ARR) = CER – EER 0,115 – 0,082 = 0,033 Control event rate (CER) – Experimental event rate (EER) Control event rate (CER) Relative risk reduction (RRR) = RRR = ARR/CER 0,033/0,115 = 0,29 (29%)
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