{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=No+intervention+%28observational+study%29&page=15",
    "query": {
      "intervention": "No intervention (observational study)",
      "page": 15
    },
    "page_size": 10
  },
  "pagination": {
    "page": 15,
    "page_size": 10,
    "total_count": 918,
    "total_pages": 92,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=No+intervention+%28observational+study%29&page=16&page_size=10",
    "previous_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=No+intervention+%28observational+study%29&page=14&page_size=10"
  },
  "source": "remote",
  "last_synced_at": "2026-10-20T17:18:06.621Z",
  "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": "NCT00414076",
      "title": "Letrozole Versus Observation in Patients With Newly Diagnosed Uterine Leiomyosarcoma",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Leiomyosarcoma",
        "Uterine Neoplasm"
      ],
      "interventions": [
        {
          "name": "Letrozole",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "M.D. Anderson Cancer Center",
      "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": 9,
      "start_date": "2006-12-19",
      "completion_date": "2017-07-13",
      "has_results": true,
      "last_update_posted_date": "2018-11-20",
      "last_synced_at": "2026-10-20T17:18:06.621Z",
      "location_count": 1,
      "location_summary": "Houston, Texas",
      "locations": [
        {
          "city": "Houston",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00414076"
    },
    {
      "nct_id": "NCT02003612",
      "title": "Historical Data Analysis of Hematological Remission and Survival in Adults With R/R Acute Lymphoblastic Leukemia",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Acute Lymphoblastic Leukemia"
      ],
      "interventions": [
        {
          "name": "Not applicable - observational study",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Amgen",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "15 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "15 Years and older"
      },
      "enrollment_count": 2373,
      "start_date": "2013-10-01",
      "completion_date": "2014-04-28",
      "has_results": false,
      "last_update_posted_date": "2022-11-07",
      "last_synced_at": "2026-10-20T17:18:06.621Z",
      "location_count": 2,
      "location_summary": "Boston, Massachusetts • Cleveland, Ohio",
      "locations": [
        {
          "city": "Boston",
          "state": "Massachusetts"
        },
        {
          "city": "Cleveland",
          "state": "Ohio"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02003612"
    },
    {
      "nct_id": "NCT06916728",
      "title": "A Post Approval Multicenter 10 Year Follow-up Observational Trial of Marketed Product - MP01 vs. Surgical Standard of Care (SSOC) Used for the Treatment of Joint Surface Lesions of the Knee",
      "overall_status": "ENROLLING_BY_INVITATION",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Knee Injuries",
        "Joint Surface Knee Lesions"
      ],
      "interventions": [
        {
          "name": "Marketed Product - MP01",
          "type": "DEVICE"
        },
        {
          "name": "Surgical Standard of Care",
          "type": "PROCEDURE"
        }
      ],
      "intervention_types": [
        "DEVICE",
        "PROCEDURE"
      ],
      "sponsor": "Smith & Nephew, Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "21 Years",
        "maximum_age": "75 Years",
        "sex": "ALL",
        "summary": "21 Years to 75 Years"
      },
      "enrollment_count": 170,
      "start_date": "2025-05-05",
      "completion_date": "2030-02-04",
      "has_results": false,
      "last_update_posted_date": "2026-07-16",
      "last_synced_at": "2026-10-20T17:18:06.621Z",
      "location_count": 1,
      "location_summary": "La Mesa, California",
      "locations": [
        {
          "city": "La Mesa",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06916728"
    },
    {
      "nct_id": "NCT05150184",
      "title": "Isolation and Characterization of Multiple Microbial Species From Diverse Healthy Adults",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Human Microbiome"
      ],
      "interventions": [
        {
          "name": "Non-interventional",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Danisco",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": null,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "50 Years",
        "sex": "ALL",
        "summary": "18 Years to 50 Years"
      },
      "enrollment_count": 52,
      "start_date": "2021-11-17",
      "completion_date": "2023-05-23",
      "has_results": false,
      "last_update_posted_date": "2023-09-07",
      "last_synced_at": "2026-10-20T17:18:06.621Z",
      "location_count": 1,
      "location_summary": "Beltsville, Maryland",
      "locations": [
        {
          "city": "Beltsville",
          "state": "Maryland"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05150184"
    },
    {
      "nct_id": "NCT04902768",
      "title": "Assessment of Patterns of Patient Reported Outcomes in Adults With Congenital Heart Disease - International Study II",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Congenital Heart Disease"
      ],
      "interventions": [
        {
          "name": "This is an observational study, there is no intervention",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "KU Leuven",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 8415,
      "start_date": "2019-08-01",
      "completion_date": "2022-12-31",
      "has_results": false,
      "last_update_posted_date": "2024-05-16",
      "last_synced_at": "2026-10-20T17:18:06.621Z",
      "location_count": 10,
      "location_summary": "San Francisco, California • Stanford, California • Gainesville, Florida + 7 more",
      "locations": [
        {
          "city": "San Francisco",
          "state": "California"
        },
        {
          "city": "Stanford",
          "state": "California"
        },
        {
          "city": "Gainesville",
          "state": "Florida"
        },
        {
          "city": "Baltimore",
          "state": "Maryland"
        },
        {
          "city": "Boston",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04902768"
    },
    {
      "nct_id": "NCT02094625",
      "title": "NAC to Prevent Cisplatin-induced Hearing Loss",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Neuroectodermal Tumors, Primitive",
        "Liver Neoplasms",
        "Osteosarcoma",
        "Other Childhood Cancers Using Cisplatin-based Regimens"
      ],
      "interventions": [
        {
          "name": "N-Acetylcysteine",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Children's Hospital Los Angeles",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "1 Year",
        "maximum_age": "21 Years",
        "sex": "ALL",
        "summary": "1 Year to 21 Years"
      },
      "enrollment_count": 52,
      "start_date": "2016-03",
      "completion_date": "2021-08",
      "has_results": false,
      "last_update_posted_date": "2023-04-18",
      "last_synced_at": "2026-10-20T17:18:06.621Z",
      "location_count": 1,
      "location_summary": "Los Angeles, California",
      "locations": [
        {
          "city": "Los Angeles",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02094625"
    },
    {
      "nct_id": "NCT00336076",
      "title": "Molecular Mechanisms and Diagnosis of Mastocytosis",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Mastocytosis"
      ],
      "interventions": [
        {
          "name": "Collection of blood and bone marrow",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "University of Michigan",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": null,
        "sex": "ALL",
        "summary": "Not listed"
      },
      "enrollment_count": 136,
      "start_date": "2004-07",
      "completion_date": "2009-07",
      "has_results": false,
      "last_update_posted_date": "2016-11-07",
      "last_synced_at": "2026-10-20T17:18:06.621Z",
      "location_count": 1,
      "location_summary": "Ann Arbor, Michigan",
      "locations": [
        {
          "city": "Ann Arbor",
          "state": "Michigan"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00336076"
    },
    {
      "nct_id": "NCT00440817",
      "title": "An Observational Study of Lymphoma in Patients With Rheumatoid Arthritis or Crohn's Disease.",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Lymphoma"
      ],
      "interventions": [
        {
          "name": "No intervention",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Centocor Ortho Biotech Services, L.L.C.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": null,
        "sex": "ALL",
        "summary": "Not listed"
      },
      "enrollment_count": 120,
      "start_date": "2006-02",
      "completion_date": "2006-08",
      "has_results": false,
      "last_update_posted_date": "2014-04-10",
      "last_synced_at": "2026-10-20T17:18:06.621Z",
      "location_count": 3,
      "location_summary": "Highland Park, Illinois • Wichita, Kansas • Albany, New York",
      "locations": [
        {
          "city": "Highland Park",
          "state": "Illinois"
        },
        {
          "city": "Wichita",
          "state": "Kansas"
        },
        {
          "city": "Albany",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00440817"
    },
    {
      "nct_id": "NCT00005398",
      "title": "University of North Carolina Alumni Heart Study",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Cardiovascular Diseases",
        "Heart Diseases",
        "Coronary Disease",
        "Depression"
      ],
      "interventions": [
        {
          "name": "There is no intervention",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Duke University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": null,
        "sex": "ALL",
        "summary": "Not listed"
      },
      "enrollment_count": 6340,
      "start_date": "1996-05",
      "completion_date": "2030-05",
      "has_results": false,
      "last_update_posted_date": "2026-07-08",
      "last_synced_at": "2026-10-20T17:18:06.621Z",
      "location_count": 1,
      "location_summary": "Durham, North Carolina",
      "locations": [
        {
          "city": "Durham",
          "state": "North Carolina"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00005398"
    },
    {
      "nct_id": "NCT03694093",
      "title": "Assessing the Effect of Patient Characteristics on Treatment Response in Primary Hyperhidrosis",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Hyperhidrosis"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "St. Louis University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "12 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "12 Years and older"
      },
      "enrollment_count": 41,
      "start_date": "2018-08-20",
      "completion_date": "2019-12-01",
      "has_results": false,
      "last_update_posted_date": "2020-02-05",
      "last_synced_at": "2026-10-20T17:18:06.621Z",
      "location_count": 1,
      "location_summary": "St Louis, Missouri",
      "locations": [
        {
          "city": "St Louis",
          "state": "Missouri"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03694093"
    }
  ]
}