What does “supported by evidence” mean?
Is every study automatically strong evidence?
Conduct matters too: participant selection, dropouts, measurements and possible biases can affect reliability. It also matters to whom results apply. [1]
General information for adults. Not medical or psychotherapeutic advice; not a substitute for examination, diagnosis or treatment.
Sources & editorial status
- IQWiG: How studies are assessed (German-language source) ↗
Methods explainer on bias, fair comparisons and applicability. Accessed: 29 October 2026.
Compiled from an existing article: 31 October 2026. Source comparison in the article: 29 October 2026. Prepared with AI assistance; independent medical review is pending. Editorial compilation; independent medical expert review has not taken place.
Editorial responsibility: Mario V.W.B.R. Obst. Known limitations and the use of each source are explained alongside the reference. A source-comparison date is not the publication date of the original source.