Characteristics of included studies and the distribution of registered studies among different characteristics
| Number | Registered | |
|---|---|---|
| Aim of the study | ||
| Diagnostic | 248 (71) | 38 (15) |
| Prognostic | 103 (29) | 14 (14) |
| Type of test evaluated | ||
| Imaging | 114 (33) | 22 (19) |
| Laboratory technique | 126 (36) | 21 (17) |
| Other | 83 (24) | 6 (7) |
| Combination of categories | 28 (8) | 3 (11) |
| Funding | ||
| Industry-involvement | 67 (19) | 22 (33) |
| Other source of funding | 203 (58) | 23 (11) |
| No funding (reported) | 81 (23) | 7 (9) |
| Journal impact factor, median (range) | 6.4 (5.0–53.3) | 6.0 (5.1–38.3) |
| Total | 351 | 52 (15) |
The third column shows numbers and percentages of the total of included studies in parentheses. The second column shows numbers and percentages of the total per category in parentheses.