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Sample size calculations: should the emperor’s clothes be off the peg or made to measure?

Norman, Geoffrey ; Monteiro, Sandra ; Salama, Suzette

BMJ (Online), 2012-08, Vol.345 (7874), p.19-21 [Periódico revisado por pares]

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Título:
Sample size calculations: should the emperor’s clothes be off the peg or made to measure?
Autor: Norman, Geoffrey ; Monteiro, Sandra ; Salama, Suzette
Assuntos: Base interest rates ; Blood pressure ; Clinical trials ; Clinical Trials as Topic - statistics & numerical data ; Effect Modifier, Epidemiologic ; Estimate reliability ; Ethics ; Hypertension ; Hypotheses ; Normativity ; Polyethylene glycol ; Qualitative research ; Research Design - standards ; Research Design - statistics & numerical data ; Research ethics ; Risk Assessment ; Sample Size ; Social sciences ; Standard deviation ; Statistics
É parte de: BMJ (Online), 2012-08, Vol.345 (7874), p.19-21
Notas: local:bmj;345/aug23_1/e5278
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SourceType-Scholarly Journals-1
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Descrição: Ethics committees require estimates of sample size for all trials, but statistical calculations are no more accurate than estimates from historical data. Geoffrey Norman and colleagues propose some “one size fits all” numbers for different study designs
Editor: England: British Medical Journal Publishing Group
Idioma: Inglês

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