{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=observational+study&page=30",
    "query": {
      "intervention": "observational study",
      "page": 30
    },
    "page_size": 10
  },
  "pagination": {
    "page": 30,
    "page_size": 10,
    "total_count": 4385,
    "total_pages": 439,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=observational+study&page=31&page_size=10",
    "previous_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=observational+study&page=29&page_size=10"
  },
  "source": "remote",
  "last_synced_at": "2026-10-20T07:17:15.994Z",
  "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": "NCT03546933",
      "title": "VitalScan MCG Rule-out Multi-centre Pivotal Study - US",
      "overall_status": "TERMINATED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Acute Coronary Syndrome"
      ],
      "interventions": [
        {
          "name": "VitalScan Magnetocardiograph",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "Creavo Medical Technologies Ltd",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 651,
      "start_date": "2018-07-17",
      "completion_date": "2019-08-06",
      "has_results": false,
      "last_update_posted_date": "2019-09-18",
      "last_synced_at": "2026-10-20T07:17:15.994Z",
      "location_count": 5,
      "location_summary": "Indianapolis, Indiana • Winston-Salem, North Carolina • Cincinnati, Ohio + 2 more",
      "locations": [
        {
          "city": "Indianapolis",
          "state": "Indiana"
        },
        {
          "city": "Winston-Salem",
          "state": "North Carolina"
        },
        {
          "city": "Cincinnati",
          "state": "Ohio"
        },
        {
          "city": "Nashville",
          "state": "Tennessee"
        },
        {
          "city": "Houston",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03546933"
    },
    {
      "nct_id": "NCT04517838",
      "title": "Immune Response to Anti-HER2 Therapies in Patients With HER2-Positive Stage I-IV Breast Cancer",
      "overall_status": "RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Breast Adenocarcinoma",
        "HER2-Positive Breast Carcinoma",
        "Anatomic Stage I Breast Cancer AJCC v8",
        "Anatomic Stage II Breast Cancer AJCC v8",
        "Anatomic Stage III Breast Cancer AJCC v8",
        "Anatomic Stage IV Breast Cancer AJCC v8"
      ],
      "interventions": [
        {
          "name": "Biospecimen Collection",
          "type": "PROCEDURE"
        }
      ],
      "intervention_types": [
        "PROCEDURE"
      ],
      "sponsor": "Mayo Clinic",
      "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": 230,
      "start_date": "2020-07-31",
      "completion_date": "2028-07-27",
      "has_results": false,
      "last_update_posted_date": "2026-06-16",
      "last_synced_at": "2026-10-20T07:17:15.994Z",
      "location_count": 1,
      "location_summary": "Jacksonville, Florida",
      "locations": [
        {
          "city": "Jacksonville",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04517838"
    },
    {
      "nct_id": "NCT00682058",
      "title": "Body Composition & REE Responses to Bariatric Surgery",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Weight Loss",
        "Weight Change"
      ],
      "interventions": [
        {
          "name": "Follow-up post-bariatric surgery",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Columbia University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 106,
      "start_date": "2006-10",
      "completion_date": "2018-06",
      "has_results": false,
      "last_update_posted_date": "2019-02-01",
      "last_synced_at": "2026-10-20T07:17:15.994Z",
      "location_count": 1,
      "location_summary": "New York, New York",
      "locations": [
        {
          "city": "New York",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00682058"
    },
    {
      "nct_id": "NCT00606190",
      "title": "Prospective Randomized Study of Brain Protection During Aortic Arch Replacement",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Aneurysm of Aortic Arch"
      ],
      "interventions": [
        {
          "name": "Retrograde brain perfusion",
          "type": "PROCEDURE"
        },
        {
          "name": "Antegrade brain perfusion",
          "type": "PROCEDURE"
        }
      ],
      "intervention_types": [
        "PROCEDURE"
      ],
      "sponsor": "The Cleveland Clinic",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "21 Years",
        "maximum_age": "74 Years",
        "sex": "ALL",
        "summary": "21 Years to 74 Years"
      },
      "enrollment_count": 123,
      "start_date": "2003-06",
      "completion_date": "2010-04",
      "has_results": false,
      "last_update_posted_date": "2017-02-17",
      "last_synced_at": "2026-10-20T07:17:15.994Z",
      "location_count": 1,
      "location_summary": "Cleveland, Ohio",
      "locations": [
        {
          "city": "Cleveland",
          "state": "Ohio"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00606190"
    },
    {
      "nct_id": "NCT00793975",
      "title": "Study of IMC-1121B in Patients With Tumors That Have Not Responded to Therapy",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Advanced Solid Tumors"
      ],
      "interventions": [
        {
          "name": "IMC-1121B",
          "type": "BIOLOGICAL"
        },
        {
          "name": "1121B",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "Eli Lilly and Company",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 37,
      "start_date": "2005-01",
      "completion_date": "2009-06",
      "has_results": false,
      "last_update_posted_date": "2013-08-19",
      "last_synced_at": "2026-10-20T07:17:15.994Z",
      "location_count": 2,
      "location_summary": "Aurora, Colorado • Philadelphia, Pennsylvania",
      "locations": [
        {
          "city": "Aurora",
          "state": "Colorado"
        },
        {
          "city": "Philadelphia",
          "state": "Pennsylvania"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00793975"
    },
    {
      "nct_id": "NCT03253575",
      "title": "CANscriptTM Clinical Outcomes in a Real-World Setting (ANCERS)-2",
      "overall_status": "SUSPENDED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Adult Solid Tumor"
      ],
      "interventions": [
        {
          "name": "CANscript",
          "type": "DIAGNOSTIC_TEST"
        }
      ],
      "intervention_types": [
        "DIAGNOSTIC_TEST"
      ],
      "sponsor": "Mitra RxDx, Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": null,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 800,
      "start_date": "2017-07-13",
      "completion_date": "2019-12-15",
      "has_results": false,
      "last_update_posted_date": "2019-04-08",
      "last_synced_at": "2026-10-20T07:17:15.994Z",
      "location_count": 30,
      "location_summary": "Gilbert, Arizona • Aurora, Colorado • Norwich, Connecticut + 23 more",
      "locations": [
        {
          "city": "Gilbert",
          "state": "Arizona"
        },
        {
          "city": "Aurora",
          "state": "Colorado"
        },
        {
          "city": "Norwich",
          "state": "Connecticut"
        },
        {
          "city": "Boca Raton",
          "state": "Florida"
        },
        {
          "city": "Fort Lauderdale",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03253575"
    },
    {
      "nct_id": "NCT03744507",
      "title": "Bone Mineral Density in Women With Uterine Fibroids or Endometriosis",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Uterine Fibroid",
        "Endometriosis"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "Myovant Sciences GmbH",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": null,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "50 Years",
        "sex": "FEMALE",
        "summary": "18 Years to 50 Years · Female only"
      },
      "enrollment_count": 660,
      "start_date": "2018-08-03",
      "completion_date": "2020-07-31",
      "has_results": false,
      "last_update_posted_date": "2020-11-10",
      "last_synced_at": "2026-10-20T07:17:15.994Z",
      "location_count": 37,
      "location_summary": "Mobile, Alabama • Mesa, Arizona • Huntington Beach, California + 31 more",
      "locations": [
        {
          "city": "Mobile",
          "state": "Alabama"
        },
        {
          "city": "Mesa",
          "state": "Arizona"
        },
        {
          "city": "Huntington Beach",
          "state": "California"
        },
        {
          "city": "Palos Verdes Estates",
          "state": "California"
        },
        {
          "city": "Denver",
          "state": "Colorado"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03744507"
    },
    {
      "nct_id": "NCT06212037",
      "title": "POCUS of the Pediatric Critical Airway",
      "overall_status": "UNKNOWN",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Stridor"
      ],
      "interventions": [
        {
          "name": "Point of Care Ultrasound",
          "type": "DIAGNOSTIC_TEST"
        }
      ],
      "intervention_types": [
        "DIAGNOSTIC_TEST"
      ],
      "sponsor": "Northwell Health",
      "sponsor_class": "OTHER",
      "healthy_volunteers": null,
      "eligibility": {
        "minimum_age": "1 Day",
        "maximum_age": "18 Years",
        "sex": "ALL",
        "summary": "1 Day to 18 Years"
      },
      "enrollment_count": 150,
      "start_date": "2023-12-01",
      "completion_date": "2025-07-01",
      "has_results": false,
      "last_update_posted_date": "2024-01-18",
      "last_synced_at": "2026-10-20T07:17:15.994Z",
      "location_count": 1,
      "location_summary": "Queens, New York",
      "locations": [
        {
          "city": "Queens",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06212037"
    },
    {
      "nct_id": "NCT07648095",
      "title": "Lacrifill for Ocular Surface Optimization in Cataract Surgery",
      "overall_status": "RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Cataract"
      ],
      "interventions": [
        {
          "name": "Lacrifill Canalicular Filler",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "The Eye Institute of West Florida",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "40 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "40 Years and older"
      },
      "enrollment_count": 65,
      "start_date": "2026-07-22",
      "completion_date": "2027-07-15",
      "has_results": false,
      "last_update_posted_date": "2026-08-21",
      "last_synced_at": "2026-10-20T07:17:15.994Z",
      "location_count": 1,
      "location_summary": "Largo, Florida",
      "locations": [
        {
          "city": "Largo",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07648095"
    },
    {
      "nct_id": "NCT02293122",
      "title": "To Investigate Agreement Between the EM-3000 and the Predicate Device Noncon Robo Pachy (F&A) (CellChek XL)",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Cornea"
      ],
      "interventions": [
        {
          "name": "Observational",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Tomey Corporation",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "80 Years",
        "sex": "ALL",
        "summary": "18 Years to 80 Years"
      },
      "enrollment_count": 75,
      "start_date": "2014-11",
      "completion_date": "2015-07",
      "has_results": false,
      "last_update_posted_date": "2023-08-22",
      "last_synced_at": "2026-10-20T07:17:15.994Z",
      "location_count": 1,
      "location_summary": "Columbus, Ohio",
      "locations": [
        {
          "city": "Columbus",
          "state": "Ohio"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02293122"
    }
  ]
}