How to Find Results of Studies
- Overview of Studies With Results
- Find Studies With Results Posted to ClinicalTrials.gov
- Find Studies With Results Published in a Medical Journal
Overview of Studies With Results
When the results of a study have been posted on ClinicalTrials.gov, the Status column of the search results list includes the note Has Results:
To view the study results, click on the study title to view the record. Then click on the Study Results tab of the study record to view the results. You can also click on Has Results in the list of studies to go directly to the study results.
The study results page includes the following information:
- Participant Flow
- Baseline Characteristics
- Outcome Measures and Statistical Analyses
- Adverse Events
- Limitations and Caveats
- Administrative Information
If no results have been posted on ClinicalTrials.gov, the results tab is labeled No Study Results Posted. See Display of Results on ClinicalTrials.gov for more information.
Find Studies With Results Posted on ClinicalTrials.gov
To search for studies with results posted on ClinicalTrials.gov, go to Advanced Search and select Studies With Results from the Study Results field dropdown list. You can also enter additional search terms in the other fields. See How to Use Advanced Search for more information.
You can also use Filters to quickly identify studies with results. After entering a search term and clicking Search, scroll down the Filters list, located on the left side of the page. Click the + sign next to Study Results, and select With Results. Then click Apply (located at the bottom and top of the Filters list). Click on the study title to display the study record or the words Has Results to go directly to the Study Results tab.
Note: Results are typically only available for studies that are no longer recruiting participants. If your search for studies with results comes up with no studies, make sure that the following filters are not checked under Status: Not yet recruiting, Recruiting, Enrolling by invitation, or Withdrawn.
Find Studies With Results Published in a Medical Journal
Study results are often published in medical journals. On ClinicalTrials.gov, publication citations are displayed at the bottom of the Full Text View tab of the study record, under the More Information heading.
*Note: Some publications shown on the study record may not discuss the results of the study but instead provide related background information.
- See all studies with citations.
- Narrow these search results on ClinicalTrials.gov by adding search terms or using filters.
Publications are identified in the study record under the More Information heading of the Full Text View and Study Results View of the study record:
Citations submitted by sponsors or investigators are displayed first under the subhead, Publications.
- Citations automatically identified by ClinicalTrials.gov are displayed under the heading, Additional publications automatically indexed to this study by ClinicalTrials.gov Identifier (NCT Number).
Note: If citations are available for studies that do not have results posted on ClinicalTrials.gov, the citations will also appear on the No Study Results Posted tab of the study record.
To view the citation:
In many cases, you can click on the citation to obtain an abstract (short summary) or full text of the article. Some full text articles are available free of charge via PubMed or PubMed Central®. You can also ask your local librarian about getting full-text articles through interlibrary loan.
The example below shows the More Information section of a record with two citations: one submitted by the sponsor or investigator and one automatically indexed to the study based on its NCT Number, NCT00178100:
Search PubMed® for Results of Studies Registered on ClinicalTrials.gov
You can also search the PubMed medical literature index for citations and abstracts of studies registered on ClinicalTrials.gov that have results published in a medical journal. Like ClinicalTrials.gov, PubMed is maintained by the National Library of Medicine (NLM).
- See PubMed search results for studies registered on ClinicalTrials.gov that have published results
- Enter additional terms in the Search box on PubMed to narrow the search.
If a study's NCT Number is published as part of the original journal article, the PubMed citation will include the NCT Number. See NLM's Clinical Trial Registry Numbers in MEDLINE®/PubMed® Records page for more information.