This was necessary as in theory, primary outcomes are more likely to be reported in the abstract, and are also more likely to be significant as trials are often powered for their primary outcome.
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The over-representation of significant p values in abstracts compared to corresponding full texts: A systematic review of surgical randomized trials.
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The sentences
Whereas the dip in frequency of reported outcomes after 0.06 may be due to tendency to report non-significant outcomes ‘close to significance’ numerically and others as simply “non-significant” or p > 0.05.