Use of risk of bias and risk of bias domains | 100 Cochrane reviews (100 %) | 31 non-Cochrane reviews (100 %)f | P value* |
---|---|---|---|
Use of risk of bias | |||
Summarises risk of bias on an outcome levela | 12 (12 %) | 2 (6 %) | 0.73 |
Unclear what level risk of bias was summarised onb | 88 (88 %) | 29 (94 %) | 0.88 |
Use of risk of bias standardc domains | |||
Review uses the 2011 tool version | 100 (100 %) | 26 (84 %) | 0.65 |
Review uses all standardc domains | 59 (59 %) | 16 (52 %) | 0.73 |
-Sequence generation | 100 (100 %) | 30 (97 %) | 1.00 |
-Allocation concealment | 100 (100 %) | 30 (97 %) | 1.00 |
-Blinding of patients and care providers | 62 (62 %) | 21 (68 %) | 0.87 |
-Blinding of outcome assessors | 65 (65 %) | 20 (65 %) | 1.00 |
-Incomplete outcome data | 99 (99 %) | 29 (94 %) | 0.88 |
-Selective reporting | 87 (87 %) | 25 (81 %) | 0.88 |
Merging and splitting of standardc domains | |||
Review merges two standardc domains | 37 (37 %) | 8 (26 %) | 0.53 |
-Merges risk of bias domains on an outcome leveld | 6 of 37 (16 %) | 0 of 8 (0 %) | 0.57 |
-Does not merge risk of bias domains on an outcome level | 31 of 37 (84 %) | 8 of 8 (100 %) | 0.79 |
Review splits a standardc domain into two or more domainse | 18 (18 %) | 7 (23 %) | 0.62 |