Number of trials with results not posted on ClinitalTrials.gov registry. Funded feature is not an exclusive one: trials might have been funded by a combination of the three possible options (National Institutes of Health (NIH), industry and other)
| No of trials | Results not posted on ClinicalTrials.gov registry | |
| Phase 3 | 525 | 438 (83.4%) |
| Phase 4 | 51 | 46 (90.2%) |
| NIH funded | 146 | 93 (63.7%) |
| Industry funded | 85 | 56 (65.9%) |
| Other funded | 502 | 450 (89.6%) |
| Total | 576 | 484 (84.0%) |