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Confidence intervals illuminate absence of evidence

Abstract:

EDITOR—We agree with Alderson that authors should recognise that non-significant results are compatible with a range of possible findings.1 Papers in the same issue of the BMJ do not adhere to this good advice. Koivunen et al concluded that adenoidectomy is not effective and cannot be recommended, yet the 95% confidence interval for further episodes of otitis media is compatible with an 18% absolute risk reduction.2 The clinically important difference sought was a 25% reduction. Kariminia...

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Journal:
British Medical Journal (BMJ)
Publication date:
2004
Local pid:
ora:810
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