Number of tools listed | Study designs to be included in systematic review N (%) |
---|
RCT only† N = 175 | RCT and NRS‡ N = 296 | All protocols N = 471 |
---|
0 | 15 (8.6) | 31 (10.4) | 46 (9.8) |
1 | 156 (89.1) | 163 (55.1) | 319 (67.7) |
2 | 4 (2.3) | 77 (26.0) | 81 (17.2) |
3+ | 0 (0.0) | 9 (3.0) | 9 (1.9) |
Suite of tools* | 0 (0.0) | 16 (5.4) | 16 (3.4) |
- NRS = non-randomized study, RCT = randomized controlled trial
- †Included quasi-RCT
- ‡Included non-randomized experimental designs, quasi-experimental studies, and observational studies
- *Suite of tools: the RoB tool was comprised of separate checklists for different study designs produced by the same organization, but the number of checklists to be used was not specified