Table 1.
General characteristics
| n° of RCT (n = 42) |
% | |
|---|---|---|
| N° of countries (n = 14) | ||
| United states | 11 | 26 |
| United Kingdom | 9 | 21 |
| Norway | 4 | 10 |
| Netherland | 4 | 10 |
| Brazil | 3 | 7 |
| Australia | 3 | 7 |
| Finland | 2 | 5 |
| Spain | 1 | 2 |
| Sweden | 1 | 2 |
| Switzerland | 1 | 2 |
| Italy | 1 | 2 |
| Thailand | 1 | 2 |
| Taiwan | 1 | 2 |
| N° of journals (n = 19) | ||
| Most frequent journals | ||
| Spine | 13 | 31 |
| Clinical Journal of Pain | 5 | 12 |
| British Medical Journal | 5 | 12 |
| Journal of Manipulative and Physiological Therapeutics | 3 | 7 |
| N° of reported funding | 34 | 81 |
| Multi-arm trials | 8 | 19 |
| n° of comparisons (n = 81) | % | |
| Comparisons | ||
| active treatment versus active treatment | 55 | 68 |
| active treatment versus inert treatment | 26 | 32 |