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Table 2 Levels of Quality

From: Specific or general exercise strategy for subacromial impingement syndrome–does it matter? A systematic literature review and meta analysis

Underlying methodology

Quality rating

Randomized trials; or double-upgraded observational studies.

High

Downgraded randomized trials; or upgraded observational studies.

Moderate

Double-downgraded randomized trials; or observational studies.

Low

Triple-downgraded randomized trials; or downgraded observational studies; or case series/case reports.

Very low

  1. Adopted from Cochrane Handbook [42]: Levels of quality of a body of evidence in the GRADE approach
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BMC Musculoskeletal Disorders

ISSN: 1471-2474

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