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Study Structure and Fields (BETA)
If you are looking for information about clinical studies, please visit ClinicalTrials.gov.

Study Structure and Fields

Documents providing a description of the organization of data elements within ClinicalTrials.gov study records, crosswalks to application programming interface (API) fields, and other information are listed in the table below, along with links to available formats.

Name Description Format
Study Structure Describes the organization of the data elements as API study fields within a in ClinicalTrials.gov study record. Schema XML JSON
Data Element-to-API Field Crosswalks List of ClinicalTrials.gov data elements and their corresponding API fields. HTML
All Fields Alphabetical list of all study fields that can contain text values. Schema XML JSON
Statistics Study Structure documentation annotated with statistics on the number of studies found, number of studies available, and other information for each study field. Schema XML JSON
Study Record Example Displays the contents of a single study record in the study structure format. XML JSON
This page last reviewed in June 2019