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Definitions of Study Quality Categories
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The study is well-designed and accounts for common biases. | The source has all 8 diagnostic study quality elements present. | The source has 5 or 6 therapeutic study quality elements |
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The study is moderately well-designed and accounts for most common biases. | The source has 6 or 7 diagnostic study quality elements | The source has 3 or 4 therapeutic study quality elements |
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There are important study design limitations. | The source has 3, 4, or 5 diagnostic study quality elements | The source has 1 or 2 therapeutic study quality elements |
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The study is not useful as primary evidence. The article may not be a clinical study or
the study design is invalid, or conclusions are based on expert consensus. For
example:
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The source has 0, 1, or 2 diagnostic study quality elements present. | The source has zero (0) therapeutic study quality elements. |
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n/a | n/a |