The fading of reported effectiveness. A meta-analysis of randomised controlled trials.

BMC Med Res Methodol · 2006 · PMC1479361 · PMID 16689990

Europe PMC DOI

hedged sentence

0.0001

closest p · 0.0× alpha

0.0001

boldest claim

The sentences

highly significantP < .0001actually significant

They found a small, but highly significant, decline in the strength of reported correlations with publication date (best model: P < .0001; R = -0.133) and with sample size (best model: P < 0.002; R = -0.188).

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