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Table 3 Recommendations by Cochrane Review Groups for using quality assessments of individual studies in reviews. Values are numbers (percentages)

From: Recommendations by Cochrane Review Groups for assessment of the risk of bias in studies

Approach recommended

All (n = 50)

Components (n = 41)

Scales (n = 9)

Analytical approach

28 (56)

20 (49)

8 (89)

Descriptive approach

1 (2)

1 (2)

0 (0)

No information

21 (42)

20 (49)

1 (11)