epidemiology

Most healthcare interventions tested in Cochrane Reviews are not effective according to high quality evidence: a systematic review and meta-analysis
In this large sample of 1,567 interventions studied within Cochrane reviews, effects of most interventions (94%) interventions were not supported by high-quality evidence.
Jeremy Howick, Despina Koletsi, John P A Ioannidis, Claire Madigan, Nikolaos Pandis, Martin Loef, Harald Walach, Sebastian Sauer, Jos Kleijnen, Jadbinder Seehra, Tess Johnson, Stefan Schmidt
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Most healthcare interventions tested in Cochrane Reviews are not effective according to high quality evidence: a systematic review and meta-analysis