Study design of research papers with substantive criticisms in rapid responses section of electronic BMJ compared with other research papers published in BMJ
| Research design | No (%) of articles | |
|---|---|---|
| Substantive criticism in rapid responses (n=105) | Other articles (n=245) | |
| Randomised trial | 32 (31) | 59 (24) |
| Cohort study | 24 (23) | 50 (20) |
| Systematic review | 15 (14) | 41 (17) |
| Cross sectional study | 9 (9) | 37 (15) |
| Case-control study | 8 (8) | 4 (2) |
| Mixed design or other | 17 (16) | 54 (22) |
P=0.02 for test of similar distributions.