{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Registry+-+Observational",
    "query": {
      "intervention": "Registry - Observational"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 348,
    "total_pages": 35,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Registry+-+Observational&page=2&page_size=10",
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-09-10T07:19:46.106Z",
  "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": "NCT01156298",
      "title": "Controlled High Risk AVONEX® Multiple Sclerosis Prevention Study In Ongoing Neurological Surveillance",
      "overall_status": "TERMINATED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Multiple Sclerosis"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "Biogen",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "85 Years",
        "sex": "ALL",
        "summary": "18 Years to 85 Years"
      },
      "enrollment_count": 383,
      "start_date": "2010-06",
      "completion_date": "2017-03",
      "has_results": false,
      "last_update_posted_date": "2012-08-03",
      "last_synced_at": "2026-09-10T07:19:46.106Z",
      "location_count": 1,
      "location_summary": "Buffalo, New York",
      "locations": [
        {
          "city": "Buffalo",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01156298"
    },
    {
      "nct_id": "NCT05671887",
      "title": "DREAM: Double Lung Transplant REgistry Aimed for Lung-limited Malignancies",
      "overall_status": "RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Lung Cancer",
        "Bilateral Cancer",
        "Lung Transplant"
      ],
      "interventions": [
        {
          "name": "Double Lung Transplantation",
          "type": "PROCEDURE"
        }
      ],
      "intervention_types": [
        "PROCEDURE"
      ],
      "sponsor": "Northwestern University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "75 Years",
        "sex": "ALL",
        "summary": "18 Years to 75 Years"
      },
      "enrollment_count": 125,
      "start_date": "2022-11-16",
      "completion_date": "2032-11",
      "has_results": false,
      "last_update_posted_date": "2024-11-14",
      "last_synced_at": "2026-09-10T07:19:46.106Z",
      "location_count": 1,
      "location_summary": "Chicago, Illinois",
      "locations": [
        {
          "city": "Chicago",
          "state": "Illinois"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05671887"
    },
    {
      "nct_id": "NCT04843111",
      "title": "Observational, Passive Surveillance Program to Collect Information on Women and Their Offspring Exposed to MenQuadfi® During Pregnancy, in United States (US)",
      "overall_status": "RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Meningococcal Infection"
      ],
      "interventions": [
        {
          "name": "Meningococcal polysaccharide (serogroups A, C, Y, and W) tetanus toxoid conjugate vaccine",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "Sanofi Pasteur, a Sanofi Company",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": null,
        "sex": "ALL",
        "summary": "Not listed"
      },
      "enrollment_count": 50,
      "start_date": "2021-03-05",
      "completion_date": "2028-05-18",
      "has_results": false,
      "last_update_posted_date": "2025-12-01",
      "last_synced_at": "2026-09-10T07:19:46.106Z",
      "location_count": 1,
      "location_summary": "Swiftwater, Pennsylvania",
      "locations": [
        {
          "city": "Swiftwater",
          "state": "Pennsylvania"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04843111"
    },
    {
      "nct_id": "NCT02234388",
      "title": "Undifferentiated Connective Tissue Disease Registry",
      "overall_status": "RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Undifferentiated Connective Tissue Disease"
      ],
      "interventions": [
        {
          "name": "Observation",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Hospital for Special Surgery, New York",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 100,
      "start_date": "2012-03",
      "completion_date": "2027-03-31",
      "has_results": false,
      "last_update_posted_date": "2026-02-12",
      "last_synced_at": "2026-09-10T07:19:46.106Z",
      "location_count": 1,
      "location_summary": "New York, New York",
      "locations": [
        {
          "city": "New York",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02234388"
    },
    {
      "nct_id": "NCT07596030",
      "title": "Self-applied taVNS for CIPN",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Chemotherapy Induced Peripheral Neuropathy"
      ],
      "interventions": [
        {
          "name": "Transcutaneous Auricular Vagus Nerve Stimulation (taVNS)",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "University of Miami",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "80 Years",
        "sex": "ALL",
        "summary": "18 Years to 80 Years"
      },
      "enrollment_count": 36,
      "start_date": "2026-06-02",
      "completion_date": "2027-07",
      "has_results": false,
      "last_update_posted_date": "2026-06-26",
      "last_synced_at": "2026-09-10T07:19:46.106Z",
      "location_count": 1,
      "location_summary": "Coral Gables, Florida",
      "locations": [
        {
          "city": "Coral Gables",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07596030"
    },
    {
      "nct_id": "NCT04807595",
      "title": "Estimation of the Prevalence of HER2 Low and Describe the SoC, Treatment Patterns, and Outcome in Real-world Practice Among Unresectable and/or Metastatic Breast Cancer Patients With HER2 Low Status",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Breast Cancer"
      ],
      "interventions": [
        {
          "name": "None (Observational study)",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "AstraZeneca",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "130 Years",
        "sex": "ALL",
        "summary": "18 Years to 130 Years"
      },
      "enrollment_count": 798,
      "start_date": "2021-05-28",
      "completion_date": "2022-04-26",
      "has_results": false,
      "last_update_posted_date": "2023-03-06",
      "last_synced_at": "2026-09-10T07:19:46.106Z",
      "location_count": 1,
      "location_summary": "Pittsburgh, Pennsylvania",
      "locations": [
        {
          "city": "Pittsburgh",
          "state": "Pennsylvania"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04807595"
    },
    {
      "nct_id": "NCT04118530",
      "title": "Long Term Arrhythmia Risk and Cardiovascular Events in Hematopoietic Stem Cell Transplant",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Hematopoietic Stem Cell Transplant",
        "Atrial Fibrillation",
        "Atrial Flutter"
      ],
      "interventions": [
        {
          "name": "HSCT Patients",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Abramson Cancer Center at Penn Medicine",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 21,
      "start_date": "2021-04-21",
      "completion_date": "2024-06-17",
      "has_results": false,
      "last_update_posted_date": "2024-10-10",
      "last_synced_at": "2026-09-10T07:19:46.106Z",
      "location_count": 1,
      "location_summary": "Philadelphia, Pennsylvania",
      "locations": [
        {
          "city": "Philadelphia",
          "state": "Pennsylvania"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04118530"
    },
    {
      "nct_id": "NCT03707743",
      "title": "Registry of Patients With Acute/Subacute Type B Aortic Dissection Treated by Means of the STABILISE Technique (STABILISE)",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Aortic Dissection"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "IRCCS San Raffaele",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 200,
      "start_date": "2018-10-30",
      "completion_date": "2026-12-30",
      "has_results": false,
      "last_update_posted_date": "2026-01-15",
      "last_synced_at": "2026-09-10T07:19:46.106Z",
      "location_count": 9,
      "location_summary": "Stanford, California • Hartford, Connecticut • Boston, Massachusetts + 5 more",
      "locations": [
        {
          "city": "Stanford",
          "state": "California"
        },
        {
          "city": "Hartford",
          "state": "Connecticut"
        },
        {
          "city": "Boston",
          "state": "Massachusetts"
        },
        {
          "city": "Camden",
          "state": "New Jersey"
        },
        {
          "city": "New York",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03707743"
    },
    {
      "nct_id": "NCT02212899",
      "title": "Prospective, Observational Registry of Renaissance-guided Spine Surgeries",
      "overall_status": "TERMINATED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Degenerative Spine Disease",
        "Spinal Deformity"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "Mazor Robotics",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "6 Years",
        "maximum_age": "90 Years",
        "sex": "ALL",
        "summary": "6 Years to 90 Years"
      },
      "enrollment_count": 93,
      "start_date": "2015-02-18",
      "completion_date": "2016-12-30",
      "has_results": false,
      "last_update_posted_date": "2020-10-05",
      "last_synced_at": "2026-09-10T07:19:46.106Z",
      "location_count": 4,
      "location_summary": "Jacksonville, Florida • Memphis, Tennessee • Houston, Texas + 1 more",
      "locations": [
        {
          "city": "Jacksonville",
          "state": "Florida"
        },
        {
          "city": "Memphis",
          "state": "Tennessee"
        },
        {
          "city": "Houston",
          "state": "Texas"
        },
        {
          "city": "Reston",
          "state": "Virginia"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02212899"
    },
    {
      "nct_id": "NCT06655064",
      "title": "Registry to Evaluate Long-Term Outcomes in Patients Who Undergo 68-Ga-PSMA-11 PET/CT Imaging Evaluations",
      "overall_status": "TERMINATED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Prostate Cancer (Adenocarcinoma)"
      ],
      "interventions": [
        {
          "name": "None- Observational",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Telix Pharmaceuticals (Innovations) Pty Limited",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "21 Years",
        "maximum_age": null,
        "sex": "MALE",
        "summary": "21 Years and older · Male only"
      },
      "enrollment_count": 120,
      "start_date": "2025-01-30",
      "completion_date": "2025-06-17",
      "has_results": false,
      "last_update_posted_date": "2025-07-14",
      "last_synced_at": "2026-09-10T07:19:46.106Z",
      "location_count": 9,
      "location_summary": "Fresno, California • Grand Junction, Colorado • Meridian, Idaho + 5 more",
      "locations": [
        {
          "city": "Fresno",
          "state": "California"
        },
        {
          "city": "Fresno",
          "state": "California"
        },
        {
          "city": "Grand Junction",
          "state": "Colorado"
        },
        {
          "city": "Meridian",
          "state": "Idaho"
        },
        {
          "city": "Royal Oak",
          "state": "Michigan"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06655064"
    }
  ]
}