Critical Appraisal tools

Critical appraisal is the systematic evaluation of clinical research papers in order to establish:

  1. Does this study address a clearly focused question?
  2. Did the study use valid methods to address this question?
  3. Are the valid results of this study important?
  4. Are these valid, important results applicable to my patient or population?

If the answer to any of these questions is “no”, you can save yourself the trouble of reading the rest of it.

This section contains useful tools and downloads for the critical appraisal of different types of medical evidence. Example appraisal sheets are provided together with several helpful examples.

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Critical Appraisal Worksheets


Chinese – Translated by Chung-Han Yang and Shih-Chieh Shao

German – Translated by Johannes Pohl and Martin Sadilek 

Lithuanian – Translated by Tumas Beinortas

Portuguese – Translated by Enderson Miranda, Rachel Riera and Luis Eduardo Fontes

Spanish – Translated by Ana Cristina Castro

Persian – Translated by Ahmad Sofi Mahmudi

See also:

Explanations & Examples

18 comments on “Critical Appraisal tools

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  14. Consider updating the RCT sheet, by adding under PICO, a suggestion to verify the original outcome at trial registration and that registration occurred before the first patient was enrolled. For an example of trial registration affecting the conclusion of a practice guideline, see

  15. your English version Diagnostic Study tool 2×2 table appears to have a mistake. It reads 10 600 620 from left to rt. I believe it should read 10 600 610

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