Guidelines: is bigger better? A review of SIGN guidelines.

BMJ Open · 2014 · PMC3918980 · PMID 24500613

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a significant trendno p-value reported

This study looks at the quality of evidence used for SIGN guidelines, and describes a significant trend for some groups to emphasise poorly evidenced recommendations.

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Quoted from the open-access full text in Europe PMC under the licence the publisher applied. The sentence is reproduced exactly as published; the emphasis is ours.