{"id": 1103697, "name": "Number of clinical trials by study type", "unit": "trials", "createdAt": "2025-08-18T15:51:57.000Z", "updatedAt": "2025-08-18T15:51:57.000Z", "coverage": "", "timespan": "1918-2031", "datasetId": 7190, "shortUnit": "", "columnOrder": 0, "shortName": "n_studies_type", "catalogPath": "grapher/health/2025-07-28/clinical_trials/study_type_per_year#n_studies_type", "descriptionShort": "Annual number of completed clinical trials registered globally in the [ClinicalTrials.gov](#dod:clinical-trials-gov) database, by study types. Study types include [interventional trials](#dod:interventional-trial) (when people are given a treatment or intervention), [observational trials](#dod:observational-trial) (when people are tracked without intervention), and [expanded access studies](#dod:expanded-access) (when people with serious conditions are given experimental treatments).\n", "descriptionProcessing": "- This data comes from the [ClinicalTrials.gov](#dod:clinical-trials-gov) database and is sorted by completion year. It only includes clinical trials with a valid \"completion date\".", "type": "int", "grapherConfigIdETL": "0198bde1-538e-7aed-a317-36d06a16ca0c", "datasetName": "Clinical Trials (ClinicalTrials.gov)", "updatePeriodDays": 365, "datasetVersion": "2025-07-28", "nonRedistributable": false, "display": {"unit": "trials", "numDecimalPlaces": 0}, "schemaVersion": 2, "processingLevel": "major", "presentation": {"topicTagsLinks": ["Medicine & Biotechnology"]}, "descriptionKey": ["This data comes from the [ClinicalTrials.gov](#dod:clinical-trials-gov) database and is sorted by completion year. It only includes clinical trials with a valid \"completion date\".", "Interventional studies involve testing new treatments or interventions and comparing them to a baseline or other treatments.", "Observational studies observe patients and collect data on participants without an intervention.", "Expanded access studies provide access to investigational drugs or devices for patients with serious conditions who do not have other treatment options.", "Registration in the ClinicalTrials.gov database is mandatory for trials in the United States and for treatments that seek FDA approval, but voluntary for other trials conducted in other countries."], "dimensions": {"years": {"values": [{"id": 1918}, {"id": 1972}, {"id": 1976}, {"id": 1979}, {"id": 1980}, {"id": 1981}, {"id": 1982}, {"id": 1983}, {"id": 1985}, {"id": 1986}, {"id": 1987}, {"id": 1988}, {"id": 1989}, {"id": 1990}, {"id": 1991}, {"id": 1992}, {"id": 1993}, {"id": 1994}, {"id": 1995}, {"id": 1996}, {"id": 1997}, {"id": 1998}, {"id": 1999}, {"id": 2000}, {"id": 2001}, {"id": 2002}, {"id": 2003}, {"id": 2004}, {"id": 2005}, {"id": 2006}, {"id": 2007}, {"id": 2008}, {"id": 2009}, {"id": 2010}, {"id": 2011}, {"id": 2012}, {"id": 2013}, {"id": 2014}, {"id": 2015}, {"id": 2016}, {"id": 2017}, {"id": 2018}, {"id": 2019}, {"id": 2020}, {"id": 2021}, {"id": 2022}, {"id": 2023}, {"id": 2024}, {"id": 2025}, {"id": 2031}]}, "entities": {"values": [{"id": 371933, "name": "Interventional", "code": null}, {"id": 371935, "name": "Observational", "code": null}, {"id": 371934, "name": "Expanded access", "code": null}]}}, "origins": [{"id": 7011, "title": "Clinical Trials (ClinicalTrials.gov)", "description": "ClinicalTrials.gov is a website and online database of clinical research studies and information about their results. The purpose of ClinicalTrials.gov is to provide information about clinical research studies to the public, researchers, and health care professionals.", "producer": "ClinicalTrials.gov", "citationFull": "National Library of Medicine (US), National Center for Biotechnology Information, ClinicalTrials.gov. U.S. National Institutes of Health, https://clinicaltrials.gov/ (2025)", "attributionShort": "NIH", "urlMain": "https://clinicaltrials.gov/about-site/trends-charts", "urlDownload": "https://clinicaltrials.gov/data-api/api", "dateAccessed": "2025-07-28", "datePublished": "2025", "license": {"url": "https://clinicaltrials.gov/about-site/terms-conditions", "name": "ClinicalTrials.gov Terms and Conditions"}}]}