Table 3

Risk of bias assessments by domain (N = 300)

Domain

Risk of bias assessments - N (%)


High

Unclear

Low


Sequence generation

8 (2.7%)

143 (47.7%)

149 (49.7%)


Allocation concealment

8 (2.7%)

217 (72.3%)

75 (25.0%)


Blinding

41 (13.7%)

108 (36.0%)

151 (50.3%)


Incomplete data

60 (20.0%)

53 (17.7%)

187 (62.3%)


Selective reporting

48 (16.0%)

6 (2.0%)

246 (82.0%)


"Other" sources of bias

85 (28.3%)

109 (36.3%)

106 (35.3%)


Hamm et al. BMC Pediatrics 2010 10:96   doi:10.1186/1471-2431-10-96

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