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Table 2 Number of explanations in a category for percent of attrition per group

From: Assessments of attrition bias in Cochrane systematic reviews are highly inconsistent and thus hindering trial comparability

Category for percent of attrition per group N (%)
Unclear 3272 (31.8)
Total attrition only mentioned; attrition per group not reported 1593 (15.5)
No attrition 1544 (15)
Only number of patients, no percent provided 1115 (10.8)
Not reported 901 (8.8)
No explanation for this category 414 (4)
10–20% 359 (3.5)
Above 30% 276 (2.7)
Under 10% 267 (2.6)
20–30% 216 (2.1)
Total attrition reported as percent; attrition per group reported as absolute numbers so it was not possible to judge percent attrition per group 248 (2.4)
Information about attrition provided for one group only 35 (0.3)
‘Support for judgment’ box was blank: no explanation provided for the judgment 27 (0.3)
Above certain percentage that is not precisely defined 13 (0.1)
Under certain percentage that is not 10% 6 (0.06)
There was no supporting explanation because RoB table did not have a domain for attrition bias at all 6 (0.06)
Total 10,292 (100)