High: Image clinoa2fu2.jpgThere are consistent results from good-quality studies. Further research is very unlikely to change the conclusions.
Moderate: Image clinoa2fu3.jpgFindings are supported, but further research could change the conclusions.
Low: Image clinoa2fu4.jpgThere are very few studies, or existing studies are flawed.
Insufficient: Image clinoa2fu5.jpgResearch is either unavailable or does not permit estimation of a treatment effect.

From: Analgesics for Osteoarthritis

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Comparative Effectiveness Review Summary Guides for Clinicians [Internet].
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