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Table 1 Type of methodological quality assessment recommended to be used by Cochrane Review Groups. Values are numbers (percentages)

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

Type Recommended (n = 50)
Component 41 (82)
   Component explicitly recommended, reservations towards scales 16 (32)
   Component explicitly recommended 18 (36)
   Component recommended through quotation of Cochrane Handbook 3 (6)
   Component assumed recommended as there was no information 4 (8)
Scale 9 (18)
   Scale explicitly recommended 7 (14)
   Scale optional 2 (4)