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