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Table 5 Quality of evidence

From: How to select outcome measurement instruments for outcomes included in a “Core Outcome Set” – a practical guideline

Quality rating Criteria
High Consistent findings in multiple studies of at least good quality OR one study of excellent quality AND a total sample size of ≥100 patients
Moderate Conflicting findings in multiple studies of at least good quality OR consistent findings in multiple studies of at least fair quality OR one study of good quality AND a total sample size of ≥50 patients
Low Conflicting findings in multiple studies of at least fair quality OR one study of fair quality AND a total sample size of ≥30 patients
Very low Only studies of poor quality OR a total sample size of <30 patients
Unknown No studies
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Trials

ISSN: 1745-6215