Table 2.
 Publication source of trials (n=133) and categories of interventions (n=137) evaluated
| Source/category | No (%) |
|---|---|
| Journal | |
| BMJ | 39 (29) |
| JAMA | 29 (22) |
| New England Journal of Medicine | 23 (17) |
| Lancet | 22 (17) |
| Annals of Internal Medicine | 15 (11) |
| PLOS Medicine | 5 (4) |
| Categories of interventions evaluated | |
| Education and training | 23 (17) |
| Device | 23 (17) |
| Surgery or perioperative intervention | 19 (14) |
| Complex intervention | 17 (12) |
| Diet | 16 (12) |
| Exercise or physical therapy | 15 (11) |
| Service delivery | 9 (7) |
| Other (such as sand as playground surface) | 8 (6) |
| Psychosocial intervention | 6 (4) |
| Complementary and alternative therapy | 1 (0.7) |