Table 1 Methods employed across projects assessing utility of ClinicalTrials.gov searches in ongoing systematic reviews
Protocol element | Diabetic peripheral neuropathy | Infertility | Omega-3 and CVD | Mental health | Tympanostomy tubes |
|---|---|---|---|---|---|
Search ClinicalTrials.gov using terms adapted from the systematic review | x | x | x Also searched ICTRP | x | x Also searched ICTRP |
Screened records using same criteria as systematic review | x | x | x | x | x |
Data Extraction from ClinicalTrials.gov | x | x | x | x | x |
Compared records to publications | x | x | x | x Also emailed authors | x |
Population | x | x | x | x | x |
Intervention | x | x | x | x | x |
Outcome definition | x | x | x | x | x |
Population baselines | x | x | x | x | x |
Results | x | x | x | x | x |
Risk of bias | x | x | |||
When there was only a ClinicalTrials.gov record | |||||
Recruitment status (as listed in ClinicalTrials.gov) | x | x | x | x | x |
Dates* (study start and completion dates) | x | x | x | x | x |
Results reported in ClinicalTrials.gov | x | x | x | No studies with results reported only in records | x |
Re-analyzed ongoing review with new results | x | No records had usable results | No records had usable results | The systematic review did not have quantitative analyses | No records had usable results |
Country (site information in ClinicalTrials.gov) | x | x |