Explore attention data for more than 10,000 ClinicalTrials.gov study records
We’re proud to announce today that Altmetric has begun displaying a wealth of online attention paid to clinical trial study records from ClinicalTrials.gov, the world’s largest registry of clinical trials. Operated by the United States National Library of Medicine (NLM) at the National Institutes of Health, ClinicalTrials.gov holds registrations from about 200,000 trials from more than 170 countries in the world. (You can find out more about the registry here.) Currently, online attention collected from our various sources since 2014 has been matched to over 10,000 study records from ClinicalTrials.gov; each of these has its own Altmetric details page.
We are excited to introduce attention tracking for this new research output type, as many of our users are involved in clinical research and publication. We hope that adding support for ClinicalTrials.gov will be valuable for the medical community in general, too. Patients, researchers, healthcare professionals, regulators, and many others can now read the conversations and media coverage surrounding specific clinical trials, even before results have been published.
For example, this clinical trial run by InSightec recently made headlines when the blood-brain-barrier was non-invasively opened for the first time in a brain tumour treatment; several news outlets and blogs directly linked to the trial’s study record (see the Altmetric details page) but the results have not been published yet.
How to find attention data for ClinicalTrials.gov study records
Users of the Altmetric Explorer and Altmetric for Institutions can quickly find all tracked ClinicalTrials.gov study records by entering “ClinicalTrials.gov” into the journal filter on the left sidebar. Within the Explorer and AFI, all users can browse through the entire collection of clinical trial study records and read through all the mentions.
In order to retrieve attention data for an individual clinical trial, users can input the study record’s National Clinical Trials (NCT) identification number (e.g. NCT00346216) within the identifiers filter on the left sidebar of the Explorer and AFI.
Altmetric for Institutions users have the added benefit of being able to enter NCT identification numbers into Custom Groups, and can thus include clinical trial study records in their collections of publications. Soon, we’ll also be enabling ClinicalTrials.gov records to be imported into Altmetric for Institutions, so that these too can be associated with authors and departments.
Since Altmetric treats the NCT identification number in the same way as any other scholarly identifier, users can also query the basic and commercial APIs with the NCT identification number for the clinical trial study record.
For example, for NCT identification number NCT00346216, the associated basic (free) API call is:
At the moment, it isn’t possible to use the Altmetric Bookmarklet on ClinicalTrials.gov pages, but we do plan to do this in future. For now, it’s easiest and quickest to access the data using the Explorer/Altmetric for Institutions and our API.