Summary of declared funding sources for studies, by intervention under investigation
| Intervention |
Commercial No (column %) |
Government/charity No (column %) |
Not specified No (column %) | Total No |
| Alternative & complementary | 5 (4) | 5 (7) | 39 (5.3) | 49 |
| Drug (injected) | 5 (4) | 5 (7) | 79 (10.8) | 89 |
| Drug (oral) | 109 (85) | 10 (14) | 342 (46.8) | 461 |
| Education | 1 (<1) | 17 (24) | 15 (2.1) | 33 |
| Physiotherapy | 3 (2) | 17 (24) | 40 (5.5) | 60 |
| Surgery | 5 (4) | 18 (25) | 215 (29.5) | 238 |
| Total | 128 (100) | 72 (100) | 730 (100) | 930 |
NB: An increase in reporting of funding source over time will skew the results. For example, more recently researched interventions such as education and behavioural change are more likely to have reported funding than more established treatments (oral drugs), as reporting of funding has only become an issue over recent years.