Table 3.
General characteristics of published/registered RCTs
| Phase | Registered RCTs | Published RCTs | |||||
|---|---|---|---|---|---|---|---|
| Herbal agents | Synthetic agents | Herbal and synthetic agents | Overall | Herbal agents | Synthetic agents | Overall | |
| 0 | 24 | 30 | 0 | 54(%1.9) | 7 | 12 | 19(8.8%) |
| 1 or ½ | 19 | 429 | 1 | 449(%16.0) | 0 | 15 | 15(%6.9) |
| 2 | 68 | 753 | 1 | 822(%29.3) | 2 | 39 | 41(%18.9) |
| 2/3 | 47 | 237 | 0 | 284(%10.1) | 2 | 31 | 33(%15.2) |
| 3 | 80 | 589 | 0 | 669(%23.9) | 2 | 53 | 55(%25.3) |
| 4 | 25 | 175 | 0 | 200(%7.1) | 1 | 13 | 14(%6.5) |
| Not applicable | 85 | 201 | 1 | 287(%10.2) | 6 | 14 | 20(%9.2) |
| Missing | 6 | 30 | 0 | 36(%1.3) | 3 | 17 | 20(%9.2) |
| Sample size | |||||||
| ≤ 50 | 58 | 654 | 1 | 713(25.5%) | 5 | 43 | 48(%22.1) |
| 51–100 | 160 | 571 | 1 | 732(26.1%) | 7 | 46 | 53(%24.4) |
| > 100 | 136 | 1219 | 1 | 1356(48.4%) | 11 | 105 | 116(%53.5) |
| Region | |||||||
| African Region | 10 | 39 | 0 | 50(1.8%) | 0 | 1 | 1(%0.5) |
| Region of Americas | 25 | 860 | 1 | 885(31.6%) | 1 | 44 | 45(%20.7) |
| South East Asia Region | 121 | 152 | 0 | 273(9.7%) | 4 | 11 | 15(%6.9) |
| European Region | 14 | 658 | 0 | 672(24.0%) | 2 | 48 | 50(%23.0) |
| Eastern Mediterranean Region | 117 | 362 | 1 | 480(17.1%) | 3 | 44 | 47(%21.7) |
| Western Pacific Region | 66 | 306 | 1 | 373(13.3%) | 13 | 37 | 50(%23.0) |
| Collaboration Between Regions | 1 | 67 | 0 | 68(2.4%) | 0 | 9 | 9(%4.1) |
| Sum | 354 | 2444 | 3 | 2801(100%) | 23 | 194 | 217(100%) |