{"id": 1103693, "name": "Number of clinical trials by purpose", "unit": "trials", "createdAt": "2025-08-18T15:51:56.000Z", "updatedAt": "2025-08-18T15:51:56.000Z", "coverage": "", "timespan": "1918-2025", "datasetId": 7190, "shortUnit": "", "columnOrder": 0, "shortName": "n_studies_purpose", "catalogPath": "grapher/health/2025-07-28/clinical_trials/purpose_per_year#n_studies_purpose", "descriptionShort": "Annual number of completed clinical trials registered globally in the [ClinicalTrials.gov](#dod:clinical-trials-gov) database, by purpose. The purpose of a clinical trial refers to the main objective or goal of the study, such as testing a new treatment, comparing treatments, or understanding a disease. This includes only [interventional trials](#dod:interventional-trial).\n", "descriptionFromProducer": "The main objective of the intervention(s) being evaluated by the clinical trial.\n\n- Treatment: One or more interventions are being evaluated for treating a disease, syndrome, or condition.\n- Prevention: One or more interventions are being assessed for preventing the development of a specific disease or health condition.\n- Diagnostic: One or more interventions are being evaluated for identifying a disease or health condition.\n- Supportive Care: One or more interventions are evaluated for maximizing comfort, minimizing side effects, or mitigating against a decline in the participant's health or function.\n- Screening: One or more interventions are assessed or examined for identifying a condition, or risk factors for a condition, in people who are not yet known to have the condition or risk factor.\n- Health Services Research: One or more interventions for evaluating the delivery, processes, management, organization, or financing of healthcare.\n- Basic Science: One or more interventions for examining the basic mechanism of action (for example, physiology or biomechanics of an intervention).\n- Device Feasibility: An intervention of a device product is being evaluated in a small clinical trial (generally fewer than 10 participants) to determine the feasibility of the product; or a clinical trial to test a prototype device for feasibility and not health outcomes. Such studies are conducted to confirm the design and operating specifications of a device before beginning a full clinical trial.\n- Other: None of the other options applies.", "descriptionProcessing": "- This data comes from the [ClinicalTrials.gov](#dod:clinical-trials-gov) database. It only includes [interventional clinical trials](#dod:interventional-trial) that are marked as \"completed\" and have a valid \"completion date\".", "type": "int", "grapherConfigIdETL": "0198bde1-4f68-7d87-8a26-001dbfeed497", "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. It only includes [interventional clinical trials](#dod:interventional-trial) that are marked as \"completed\" and have a valid \"completion date\".", "The purpose of a clinical trial refers to the main objective or goal of the study, such as testing a new treatment, comparing treatments, or understanding a disease.", "Possible purposes include testing a new treatment (drug or device), improving diagnostics, preventing disease, or understanding a disease.", "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": 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}]}, "entities": {"values": [{"id": 35473, "name": "Other", "code": null}, {"id": 371916, "name": "Prevention", "code": null}, {"id": 371915, "name": "Treatment", "code": null}, {"id": 371912, "name": "Diagnostic", "code": null}, {"id": 371918, "name": "Screening", "code": null}, {"id": 371914, "name": "Basic Science", "code": null}, {"id": 371917, "name": "Health Services Research", "code": null}, {"id": 371913, "name": "ECT", "code": null}, {"id": 371919, "name": "Supportive Care", "code": null}, {"id": 371920, "name": "Device Feasibility", "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"}}]}