Table 2. Variables, Results, and Links to Published Articles Reported in the Clinical Trial Registries.
| Variable | ClinicalTrials.gov | EudraCT | ISRCTN | Other registriesa |
|---|---|---|---|---|
| Identified RCTs, No. | 188 | 185 | 20 | 47 |
| Reported variables, No. (%) | ||||
| Primary outcome | 188 (100) | 184 (99) | 20 (100) | 46 (98) |
| Target sample size | 186 (99) | 185 (100) | 20 (100) | 44 (94) |
| Date of first patient enrollment | 188 (100) | 0b | 20 (100) | 46 (98) |
| Funding source | 2 (1)c | 165 (89) | 20 (100) | 47 (100) |
| Sponsor | 188 (100) | 185 (100) | 20 (100) | 47 (100) |
| Status of study | 188 (100) | 185 (100) | 20 (100) | 47 (100) |
| Link to published article, No (%) | 101 (54) | 15 (8) | 8 (40) | 2 (4) |
| Results posted, No. (%) | 107 (57) | 127 (69) | 0 | 0 |
Abbreviations: EudraCT, European Union Drug Regulating Authorities Clinical Trials Database; RCT, randomized clinical trial.
a
German Clinical Trials Register (n = 33); Clinical Trials Registry–India (n = 11); Australian New Zealand Clinical Trials Registry (n = 2); Japan Primary Registries Network (n = 1).
b
EudraCT did not report the date of the first patient enrolled.
c
ClinicalTrials.gov did not have a separate field to enter the funder of the study; 2 RCTs reported this separately in the “More Information” section.