“Evidence of absence” can be importantBMJ 2003; 326 doi: https://doi.org/10.1136/bmj.326.7401.1267 (Published 05 June 2003) Cite this as: BMJ 2003;326:1267
- Michael Joffe, reader in epidemiology (email@example.com)
- Imperial College London, St Mary's Campus, London W2 1PG
EDITOR—Alderson and Chalmers are rightly critical of those who make inappropriate claims, but they are themselves guilty of this.1 Compare these statements: “It is never correct to claim that treatments have no effect or that there is no difference in the effects of treatments”, and “Absence of evidence is not evidence of …
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