Search strategy used for PubMed and EMBASE bibliographic databases
| Search terms | |
|---|---|
| #1 | Any registry from WHO ICTRP OR “trial registry”[Title/Abstract] OR “trial register”[Title/Abstract] OR “trial registries”[Title/Abstract] OR “trials registry” [Title/Abstract] OR “registry of clinical trials” [Title/Abstract] |
| #2 | (“trial registration”[Title/Abstract] AND (discrepancy[Title/Abstract] OR discrepancies[Title/Abstract] OR consistency[Title/Abstract] OR inconsistency[Title/Abstract])) |
| #3 | #1 OR #2 |
| #4 | (unregistered[Title/Abstract] OR non-publication[Title/Abstract] OR nonpublication[Title/Abstract] OR unpublished[Title/Abstract] OR published[Title/Abstract] OR (registered[Title/Abstract] AND (publication[Title/Abstract] OR clinical trial as topic [MeSH Terms]))) Note: For EMBASE, equivalent EMTREE is “clinical trial (topic)”. |
| #5 | #3 AND #4 |
| #6 | (“outcome reporting bias”[Title/Abstract] OR “selective reporting”[Title/Abstract] OR “selective outcome reporting”[Title/Abstract] OR “missing outcome data”[Title/Abstract] OR “publication bias”[MeSH Terms] OR (“reporting quality”[Title/Abstract] AND publications[Title/Abstract])) Note: For EMBASE, the publication bias MeSH Term has no equivalent and is removed. |
| #7 | #5 OR #6 |
ICTRP, International Clinical Trial Registry Platform; MeSH, Medical Subject Headings.