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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)