{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=observational+study&page=44",
    "query": {
      "intervention": "observational study",
      "page": 44
    },
    "page_size": 10
  },
  "pagination": {
    "page": 44,
    "page_size": 10,
    "total_count": 4386,
    "total_pages": 439,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=observational+study&page=45&page_size=10",
    "previous_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=observational+study&page=43&page_size=10"
  },
  "source": "remote",
  "last_synced_at": "2026-10-21T08:50:02.038Z",
  "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": "NCT02686411",
      "title": "Evaluation of Satisfaction With Quality of Care on the Palliative Care Unit",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Hematopoietic and Lymphoid Cell Neoplasm",
        "Malignant Solid Neoplasm"
      ],
      "interventions": [
        {
          "name": "Survey Administration",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "M.D. Anderson Cancer Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 35,
      "start_date": "2016-02-17",
      "completion_date": "2022-04-29",
      "has_results": false,
      "last_update_posted_date": "2022-05-10",
      "last_synced_at": "2026-10-21T08:50:02.038Z",
      "location_count": 1,
      "location_summary": "Houston, Texas",
      "locations": [
        {
          "city": "Houston",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02686411"
    },
    {
      "nct_id": "NCT02627599",
      "title": "A Prospective Observational Study of the Breath Responsive Variable Bolus Oxygen Conserving Device",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "COPD"
      ],
      "interventions": [
        {
          "name": "Breath Responsive Variable Bolus Oxygen Conserving Device",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "StratiHealth",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "65 Years",
        "maximum_age": "85 Years",
        "sex": "ALL",
        "summary": "65 Years to 85 Years"
      },
      "enrollment_count": 35,
      "start_date": "2015-05",
      "completion_date": "2016-11",
      "has_results": false,
      "last_update_posted_date": "2018-08-15",
      "last_synced_at": "2026-10-21T08:50:02.038Z",
      "location_count": 3,
      "location_summary": "Oceanside, California • Vista, California • Westminster, California",
      "locations": [
        {
          "city": "Oceanside",
          "state": "California"
        },
        {
          "city": "Vista",
          "state": "California"
        },
        {
          "city": "Westminster",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02627599"
    },
    {
      "nct_id": "NCT06089616",
      "title": "A Study to Document and to Further Describe Long-term Safety and Effectiveness of Palovarotene in Participants With Fibrodysplasia Ossificans Progressiva (FOP)",
      "overall_status": "RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Fibrodysplasia Ossificans Progressiva"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "Ipsen",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "8 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "8 Years and older"
      },
      "enrollment_count": 100,
      "start_date": "2024-12-05",
      "completion_date": "2035-12-05",
      "has_results": false,
      "last_update_posted_date": "2026-10-01",
      "last_synced_at": "2026-10-21T08:50:02.038Z",
      "location_count": 2,
      "location_summary": "San Francisco, California • Philadelphia, Pennsylvania",
      "locations": [
        {
          "city": "San Francisco",
          "state": "California"
        },
        {
          "city": "Philadelphia",
          "state": "Pennsylvania"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06089616"
    },
    {
      "nct_id": "NCT04427384",
      "title": "Registry of Patients With Brain Tumors Treated With STaRT (GammaTiles)",
      "overall_status": "RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Brain Tumor, Recurrent",
        "Brain Tumor",
        "Brain Tumor, Primary",
        "Brain Tumor - Metastatic",
        "Brain Tumor, Adult: Glioblastoma",
        "Brain Tumor, Adult Meningioma"
      ],
      "interventions": [
        {
          "name": "GammaTile",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "GT Medical Technologies, Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": null,
        "sex": "ALL",
        "summary": "Not listed"
      },
      "enrollment_count": 600,
      "start_date": "2020-09-11",
      "completion_date": "2028-12-31",
      "has_results": false,
      "last_update_posted_date": "2026-07-22",
      "last_synced_at": "2026-10-21T08:50:02.038Z",
      "location_count": 53,
      "location_summary": "Phoenix, Arizona • Little Rock, Arkansas • Castro Valley, California + 45 more",
      "locations": [
        {
          "city": "Phoenix",
          "state": "Arizona"
        },
        {
          "city": "Little Rock",
          "state": "Arkansas"
        },
        {
          "city": "Castro Valley",
          "state": "California"
        },
        {
          "city": "La Jolla",
          "state": "California"
        },
        {
          "city": "Laguna Hills",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04427384"
    },
    {
      "nct_id": "NCT07199764",
      "title": "Maintenance Combinatorial Myeloid Immunotherapy for Unresectable Pancreatic Cancer",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Pancreatic Ductal Adenocarcinoma"
      ],
      "interventions": [
        {
          "name": "Odetiglucan",
          "type": "DRUG"
        },
        {
          "name": "Mitazalimab",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "University of Pennsylvania",
      "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": "2025-11-25",
      "completion_date": "2028-12",
      "has_results": false,
      "last_update_posted_date": "2026-06-10",
      "last_synced_at": "2026-10-21T08:50:02.038Z",
      "location_count": 1,
      "location_summary": "Philadelphia, Pennsylvania",
      "locations": [
        {
          "city": "Philadelphia",
          "state": "Pennsylvania"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07199764"
    },
    {
      "nct_id": "NCT06347809",
      "title": "DNA Methylation in Adenocarcinoma of the Prostate: Analysis of Validated Biomarkers in Urine",
      "overall_status": "TERMINATED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Prostate Adenocarcinoma",
        "Prostate Carcinoma"
      ],
      "interventions": [
        {
          "name": "Non-Interventional Study",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Mayo Clinic",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "MALE",
        "summary": "18 Years and older · Male only"
      },
      "enrollment_count": 24,
      "start_date": "2019-01-23",
      "completion_date": "2025-07-31",
      "has_results": false,
      "last_update_posted_date": "2025-12-15",
      "last_synced_at": "2026-10-21T08:50:02.038Z",
      "location_count": 1,
      "location_summary": "Rochester, Minnesota",
      "locations": [
        {
          "city": "Rochester",
          "state": "Minnesota"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06347809"
    },
    {
      "nct_id": "NCT03060187",
      "title": "Proposal and Clinical Evaluation of a Comprehensive Airway Exam Score",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Intubation"
      ],
      "interventions": [
        {
          "name": "KU Score",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "University of Kansas Medical Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 2000,
      "start_date": "2010-02",
      "completion_date": "2011-01",
      "has_results": false,
      "last_update_posted_date": "2017-02-23",
      "last_synced_at": "2026-10-21T08:50:02.038Z",
      "location_count": 1,
      "location_summary": "Kansas City, Kansas",
      "locations": [
        {
          "city": "Kansas City",
          "state": "Kansas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03060187"
    },
    {
      "nct_id": "NCT01498484",
      "title": "Therapeutic Effects of Epstein-Barr Virus Immune T-Lymphocytes Derived From a Normal HLA-Compatible Or Partially-Matched Third-Party Donor in the Treatment of EBV Lymphoproliferative Disorders and EBV-Associated Malignancies",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "EBV-induced Lymphomas",
        "EBV-associated Malignancies",
        "Transplant Patients With EBV Viremia at High Risk for Developing a Recurrent EBV Lymphoma"
      ],
      "interventions": [
        {
          "name": "EBV-specific T cells (EBV-CTLs)",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "Atara Biotherapeutics",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": null,
        "sex": "ALL",
        "summary": "Not listed"
      },
      "enrollment_count": 87,
      "start_date": "2011-12",
      "completion_date": "2019-07",
      "has_results": true,
      "last_update_posted_date": "2022-10-21",
      "last_synced_at": "2026-10-21T08:50:02.038Z",
      "location_count": 1,
      "location_summary": "New York, New York",
      "locations": [
        {
          "city": "New York",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01498484"
    },
    {
      "nct_id": "NCT06059963",
      "title": "A Prospective, Multi-center, Observational Study for Signal-C Test Evaluation",
      "overall_status": "RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Colorectal Cancer",
        "Advanced Adenocarcinoma"
      ],
      "interventions": [
        {
          "name": "Signal-C™",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "Universal Diagnostics",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "45 Years",
        "maximum_age": "84 Years",
        "sex": "ALL",
        "summary": "45 Years to 84 Years"
      },
      "enrollment_count": 12000,
      "start_date": "2024-01-18",
      "completion_date": "2026-12-01",
      "has_results": false,
      "last_update_posted_date": "2025-11-10",
      "last_synced_at": "2026-10-21T08:50:02.038Z",
      "location_count": 1,
      "location_summary": "Raonoke, Virginia",
      "locations": [
        {
          "city": "Raonoke",
          "state": "Virginia"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06059963"
    },
    {
      "nct_id": "NCT02374671",
      "title": "A Clinical Trial of The VisAbility Micro Insert System for Presbyopic Patients",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Presbyopia"
      ],
      "interventions": [
        {
          "name": "VisAbility Micro Insert",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "VisDura, Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "45 Years",
        "maximum_age": "60 Years",
        "sex": "ALL",
        "summary": "45 Years to 60 Years"
      },
      "enrollment_count": 365,
      "start_date": "2014-11-15",
      "completion_date": "2018-04-13",
      "has_results": true,
      "last_update_posted_date": "2020-01-06",
      "last_synced_at": "2026-10-21T08:50:02.038Z",
      "location_count": 14,
      "location_summary": "Orange, California • San Diego, California • Honolulu, Hawaii + 10 more",
      "locations": [
        {
          "city": "Orange",
          "state": "California"
        },
        {
          "city": "San Diego",
          "state": "California"
        },
        {
          "city": "Honolulu",
          "state": "Hawaii"
        },
        {
          "city": "Des Plaines",
          "state": "Illinois"
        },
        {
          "city": "Indianapolis",
          "state": "Indiana"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02374671"
    }
  ]
}