- Sources, search strategy, and number of records in the review.
| Source | Search period | Search strategy | Number of records |
|---|---|---|---|
| Medline | 01/01/1990 to 06/29/2018 | Syntax used by Hayenes et al. (https://www.ncbi.nlm.nih.gov/books/NBK3827/#pubmedhelp.Clinical_Queries_Filters) For Category: Therapeutic Optimized for: sensitive/broad Sensitive/specific: 99%/70% (clinical[Title/Abstract] AND trial[Title/Abstract]) OR clinical trials as topic[MeSH Terms] OR clinical trial[Publication Type] OR random*[Title/Abstract] OR random allocation[MeSH Terms] OR therapeutic use[MeSH Subheading]). | 3469 |
| EMBASE | 01/01/1990 to 06/29/2018 | (clinical [Title/Abstract] AND trial[Title/Abstract]) OR clinical trials as topic[MeSH Terms] OR clinical trial[Publication Type] OR random*[Title/Abstract] OR random allocation[MeSH Terms] OR therapeutic use[MeSH Subheading]). | 1993 |
| Cochrane Central Register of Controlled Trials (CENTRAL) | 01/01/1990 to 06/29/2018 | Search trials, source (“Saudi Arabia” OR “Oman” OR “Kuwait” OR “Qatar” OR “Emirates” OR “Bahrain”), using search limits which included: All databases | 773 |
| ClinicalTrials.gov | 01/01/1990 to 06/29/2018 | Through clinicaltrials.gov, advanced search, status completed, country (gulf countries one by one), phase 3 | 311 |
| Total | 6546 records | ||