{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Observational+Control&page=20",
    "query": {
      "intervention": "Observational Control",
      "page": 20
    },
    "page_size": 10
  },
  "pagination": {
    "page": 20,
    "page_size": 10,
    "total_count": 644,
    "total_pages": 65,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Observational+Control&page=21&page_size=10",
    "previous_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Observational+Control&page=19&page_size=10"
  },
  "source": "remote",
  "last_synced_at": "2026-10-24T10:11:02.982Z",
  "attribution": "Data derived from public ClinicalTrials.gov records. The official record at https://clinicaltrials.gov/ remains the source of truth for current availability, contacts, and full study details.",
  "notes": [
    "This endpoint exposes only public summary fields — no participant contact emails, phone numbers, or scraped investigator contact details.",
    "For contact information and full protocol detail, follow each trial's `official_url` to the ClinicalTrials.gov record.",
    "This API is a navigational aid. It does not provide medical advice, eligibility determinations, or compensation guarantees."
  ],
  "trials": [
    {
      "nct_id": "NCT01758588",
      "title": "Pegylated Interferon Alpha-2b in Early Primary Myelofibrosis",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Myelofibrosis"
      ],
      "interventions": [
        {
          "name": "Peginterferon alfa-2a",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Weill Medical College of Cornell University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 8,
      "start_date": "2013-01",
      "completion_date": "2017-06",
      "has_results": true,
      "last_update_posted_date": "2018-07-24",
      "last_synced_at": "2026-10-24T10:11:02.982Z",
      "location_count": 2,
      "location_summary": "Atlanta, Georgia • New York, New York",
      "locations": [
        {
          "city": "Atlanta",
          "state": "Georgia"
        },
        {
          "city": "New York",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01758588"
    },
    {
      "nct_id": "NCT06438315",
      "title": "SuperSaturated Oxygen Comprehensive Observational Registry",
      "overall_status": "RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "STEMI - ST Elevation Myocardial Infarction",
        "AMI"
      ],
      "interventions": [
        {
          "name": "KCCQ",
          "type": "OTHER"
        },
        {
          "name": "Eq5D",
          "type": "OTHER"
        },
        {
          "name": "cMRI (Subset of patients)",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "TherOx",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "80 Years",
        "sex": "ALL",
        "summary": "18 Years to 80 Years"
      },
      "enrollment_count": 1000,
      "start_date": "2024-08-13",
      "completion_date": "2029-03-31",
      "has_results": false,
      "last_update_posted_date": "2026-08-20",
      "last_synced_at": "2026-10-24T10:11:02.982Z",
      "location_count": 25,
      "location_summary": "Fountain Valley, California • La Jolla, California • Laguna Hills, California + 21 more",
      "locations": [
        {
          "city": "Fountain Valley",
          "state": "California"
        },
        {
          "city": "La Jolla",
          "state": "California"
        },
        {
          "city": "Laguna Hills",
          "state": "California"
        },
        {
          "city": "Long Beach",
          "state": "California"
        },
        {
          "city": "Los Angeles",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06438315"
    },
    {
      "nct_id": "NCT03033160",
      "title": "Vaginal Estrogen for Asymptomatic Microscopic Hematuria",
      "overall_status": "UNKNOWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Asymptomatic Microscopic Hematuria"
      ],
      "interventions": [
        {
          "name": "Estradiol Ring",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Boston Urogynecology Associates",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "FEMALE",
        "summary": "18 Years and older · Female only"
      },
      "enrollment_count": 68,
      "start_date": "2016-12",
      "completion_date": "2020-12-30",
      "has_results": false,
      "last_update_posted_date": "2017-10-12",
      "last_synced_at": "2026-10-24T10:11:02.982Z",
      "location_count": 1,
      "location_summary": "Cambridge, Massachusetts",
      "locations": [
        {
          "city": "Cambridge",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03033160"
    },
    {
      "nct_id": "NCT04557059",
      "title": "A Study of Adding Apalutamide to Radiotherapy and LHRH Agonist in High-Risk Patients With Hormone-Sensitive Prostate Cancer",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Prostatic Neoplasms"
      ],
      "interventions": [
        {
          "name": "Radiotherapy",
          "type": "RADIATION"
        },
        {
          "name": "LHRHa",
          "type": "DRUG"
        },
        {
          "name": "Apalutamide",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "RADIATION",
        "DRUG"
      ],
      "sponsor": "Janssen Pharmaceutica N.V., Belgium",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "MALE",
        "summary": "18 Years and older · Male only"
      },
      "enrollment_count": 691,
      "start_date": "2020-11-12",
      "completion_date": "2031-09-15",
      "has_results": false,
      "last_update_posted_date": "2026-09-25",
      "last_synced_at": "2026-10-24T10:11:02.982Z",
      "location_count": 13,
      "location_summary": "Tucson, Arizona • Little Rock, Arkansas • Lakewood, Colorado + 10 more",
      "locations": [
        {
          "city": "Tucson",
          "state": "Arizona"
        },
        {
          "city": "Little Rock",
          "state": "Arkansas"
        },
        {
          "city": "Lakewood",
          "state": "Colorado"
        },
        {
          "city": "Hialeah",
          "state": "Florida"
        },
        {
          "city": "Jeffersonville",
          "state": "Indiana"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04557059"
    },
    {
      "nct_id": "NCT02021981",
      "title": "Improving Health Outcomes: Blood Pressure",
      "overall_status": "UNKNOWN",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Hypertension"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "American Medical Association",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 10,
      "start_date": "2013-10",
      "completion_date": "2017-07",
      "has_results": false,
      "last_update_posted_date": "2016-07-13",
      "last_synced_at": "2026-10-24T10:11:02.982Z",
      "location_count": 1,
      "location_summary": "Chicago, Illinois",
      "locations": [
        {
          "city": "Chicago",
          "state": "Illinois"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02021981"
    },
    {
      "nct_id": "NCT05663957",
      "title": "eVusheld Assessment reaL wORld Effectiveness in the VA Health System",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "SARS-CoV-2, COVID-19"
      ],
      "interventions": [
        {
          "name": "Evusheld",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "AstraZeneca",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "12 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "12 Years and older"
      },
      "enrollment_count": 5814,
      "start_date": "2023-01-04",
      "completion_date": "2023-09-01",
      "has_results": false,
      "last_update_posted_date": "2024-09-03",
      "last_synced_at": "2026-10-24T10:11:02.982Z",
      "location_count": 1,
      "location_summary": "Salt Lake City, Utah",
      "locations": [
        {
          "city": "Salt Lake City",
          "state": "Utah"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05663957"
    },
    {
      "nct_id": "NCT06002204",
      "title": "Studying the Health of Asians to Advance Knowledge, Treatments, and Interventions for Depression",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Depression",
        "Treatment Resistant Depression",
        "Mood Disorders",
        "Bipolar Disorder",
        "Mental Disorders",
        "Bipolar and Related Disorders"
      ],
      "interventions": [
        {
          "name": "Observational Study",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "University of Texas Southwestern Medical Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "10 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "10 Years and older"
      },
      "enrollment_count": 6000,
      "start_date": "2024-03-01",
      "completion_date": "2035-02",
      "has_results": false,
      "last_update_posted_date": "2026-09-17",
      "last_synced_at": "2026-10-24T10:11:02.982Z",
      "location_count": 1,
      "location_summary": "Dallas, Texas",
      "locations": [
        {
          "city": "Dallas",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06002204"
    },
    {
      "nct_id": "NCT06452316",
      "title": "Study to Evaluate the Safety and Efficacy of CSB-001 Ophthalmic Solution 0.1% in Subjects With Limbal Stem Cell Deficiency",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Limbal Stem Cell Deficiency"
      ],
      "interventions": [
        {
          "name": "CSB-001 Ophthalmic Solution 0.1%",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "Claris Biotherapeutics, Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 75,
      "start_date": "2024-05-15",
      "completion_date": "2027-12-31",
      "has_results": false,
      "last_update_posted_date": "2026-08-13",
      "last_synced_at": "2026-10-24T10:11:02.982Z",
      "location_count": 6,
      "location_summary": "Loma Linda, California • Carmel, Indiana • Indianapolis, Indiana + 3 more",
      "locations": [
        {
          "city": "Loma Linda",
          "state": "California"
        },
        {
          "city": "Carmel",
          "state": "Indiana"
        },
        {
          "city": "Indianapolis",
          "state": "Indiana"
        },
        {
          "city": "Minnetonka",
          "state": "Minnesota"
        },
        {
          "city": "Portland",
          "state": "Oregon"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06452316"
    },
    {
      "nct_id": "NCT02172898",
      "title": "Alcoholic Hepatitis: A Multicenter, Observational Study by the TREAT Consortium",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Alcoholic Hepatitis"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "Indiana University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "21 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "21 Years and older"
      },
      "enrollment_count": 454,
      "start_date": "2013-06",
      "completion_date": "2019-07",
      "has_results": false,
      "last_update_posted_date": "2020-02-11",
      "last_synced_at": "2026-10-24T10:11:02.982Z",
      "location_count": 2,
      "location_summary": "Rochester, Minnesota • Richmond, Virginia",
      "locations": [
        {
          "city": "Rochester",
          "state": "Minnesota"
        },
        {
          "city": "Richmond",
          "state": "Virginia"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02172898"
    },
    {
      "nct_id": "NCT00662415",
      "title": "Examining Brain Changes Using Functional Magnetic Resonance Imaging (fMRI) in Amputees With Phantom Limb Pain Following Mirror Therapy",
      "overall_status": "UNKNOWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Phantom Limb Pain"
      ],
      "interventions": [
        {
          "name": "mirror-box treatment",
          "type": "DEVICE"
        },
        {
          "name": "observation",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "DEVICE",
        "BEHAVIORAL"
      ],
      "sponsor": "United States Department of Defense",
      "sponsor_class": "FED",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "75 Years",
        "sex": "ALL",
        "summary": "18 Years to 75 Years"
      },
      "enrollment_count": 42,
      "start_date": "2008-02",
      "completion_date": "2010-02",
      "has_results": false,
      "last_update_posted_date": "2008-04-21",
      "last_synced_at": "2026-10-24T10:11:02.982Z",
      "location_count": 2,
      "location_summary": "Washington D.C., District of Columbia • Bethesda, Maryland",
      "locations": [
        {
          "city": "Washington D.C.",
          "state": "District of Columbia"
        },
        {
          "city": "Bethesda",
          "state": "Maryland"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00662415"
    }
  ]
}