Number of clinical trial registrations in each CTR, percentage of those identifying the funder as the sponsor or identifying the funder as different from the sponsor. Number of registrations with inconsistent information between the different CTRs
| Clinical trial registry | EU-CTR | ClinicalTrials.gov | ISRCTN | ANZCTN |
| Name of the field with the funder identification in each CTR | Source of Monetary or Material Support | Sponsor and Collaborators | Funder | Funder |
| Total number of registrations | 86 | 192 | 44 | 13 |
| Registration without indication of Source of Monetary Support, Collaborator or Funder* | 52% | 6% | 5% | 0% |
| Clinical trials with funder/collaborator different from the sponsor* | 68% | 51% | 95% | 100% |
| Registration with inconsistent† information (Supplementary S.I.1 table 1) | 12 out of 29 (41%) | 21 out of 33 (64%) | 1 out of 8 (13%) | 0 out of 3 (0%) |
*Percentages calculated considering the total number of registrations indicated in the first line of the table.
†Inconsistent information means that information about funding source differed (with less information) from the others CTRs used for this study.
ANZCTR, Australian New Zealand Clinical Trials Registry; CTR, clinical trials registry; EU-CTR, EU Clinical Trials Register; ISRCTN, International Standard Randomised Controlled Trial Number.