Summary of main points
- The Crowe Critical Appraisal Tool (CCAT) consists of
- Always use the CCAT Form and the CCAT User Guide together.
- Research designs should be appraised on their own merits, not to a ‘gold standard’.
- All categories must be scored: it does not matter which research design was used
- The lowest score for a category is 0, the highest score is 5
- Category scores are whole numbers only (that is 0, 1, 2, 3, 4, or 5)
- The score for each category must be reported
- The total score (out of 40 or as a percent) is reported in addition to each category score.
- Item descriptors may be marked present (✔), absent (✘), or not applicable (◼).
- Tick marks are not a check list to be totalled.
- Tick marks are simply a guide to scoring a category.
- If in doubt use your best judgement, there is no right or wrong answer.
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