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Teaching tip: balloons and teddy bears
  1. Gervase Vernon, MA, MSc, MB BS, MRCP (Paeds), FRCGP
  1. General Practitioner, John Tasker House
 Essex, UK

    Statistics from Altmetric.com

    We all know that the choice of the measure of effect (relative risk reduction [RRR], absolute risk reduction [ARR], or number needed to treat [NNT]) influences attitudes to a treatment. But how do we make this memorable for students? There are 2 types of “statistics”: those whose value depends on the underlying frequency of a disease and those statistics whose value does not depend on it (“invariant statistics”). Thus the RRR and its friends RBI (relative benefit increase) and RRI (relative risk …

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