{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=observational+study&page=38",
    "query": {
      "intervention": "observational study",
      "page": 38
    },
    "page_size": 10
  },
  "pagination": {
    "page": 38,
    "page_size": 10,
    "total_count": 4386,
    "total_pages": 439,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=observational+study&page=39&page_size=10",
    "previous_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=observational+study&page=37&page_size=10"
  },
  "source": "remote",
  "last_synced_at": "2026-10-20T17:42:29.308Z",
  "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": "NCT05170126",
      "title": "A Study on the Safety of Ozanimod Exposure in Pregnant Women and Their Offspring",
      "overall_status": "RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Multiple Sclerosis"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "Bristol-Myers Squibb",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": null,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": null,
        "sex": "FEMALE",
        "summary": "Female only"
      },
      "enrollment_count": 1182,
      "start_date": "2022-07-15",
      "completion_date": "2032-06-30",
      "has_results": false,
      "last_update_posted_date": "2025-11-20",
      "last_synced_at": "2026-10-20T17:42:29.308Z",
      "location_count": 2,
      "location_summary": "Bethesda, Maryland",
      "locations": [
        {
          "city": "Bethesda",
          "state": "Maryland"
        },
        {
          "city": "Bethesda",
          "state": "Maryland"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05170126"
    },
    {
      "nct_id": "NCT00716976",
      "title": "Sodium Thiosulfate in Preventing Hearing Loss in Young Patients Receiving Cisplatin for Newly Diagnosed Germ Cell Tumor, Hepatoblastoma, Medulloblastoma, Neuroblastoma, Osteosarcoma, or Other Malignancy",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Brain Tumor",
        "Central Nervous System Tumor",
        "Childhood Germ Cell Tumor",
        "Extragonadal Germ Cell Tumor",
        "Liver Cancer",
        "Neuroblastoma",
        "Ototoxicity",
        "Ovarian Cancer",
        "Sarcoma"
      ],
      "interventions": [
        {
          "name": "sodium thiosulfate",
          "type": "DRUG"
        },
        {
          "name": "examination",
          "type": "PROCEDURE"
        }
      ],
      "intervention_types": [
        "DRUG",
        "PROCEDURE"
      ],
      "sponsor": "Children's Oncology Group",
      "sponsor_class": "NETWORK",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "1 Year",
        "maximum_age": "18 Years",
        "sex": "ALL",
        "summary": "1 Year to 18 Years"
      },
      "enrollment_count": 131,
      "start_date": "2008-06-23",
      "completion_date": "2021-06-30",
      "has_results": true,
      "last_update_posted_date": "2023-11-09",
      "last_synced_at": "2026-10-20T17:42:29.308Z",
      "location_count": 68,
      "location_summary": "Birmingham, Alabama • Little Rock, Arkansas • Los Angeles, California + 61 more",
      "locations": [
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Little Rock",
          "state": "Arkansas"
        },
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "Madera",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00716976"
    },
    {
      "nct_id": "NCT02198768",
      "title": "Ankle Fracture vs Ankle Fracture-Dislocation",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Ankle Fractures"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "Wake Forest University Health Sciences",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 80,
      "start_date": "2012-09",
      "completion_date": "2017-01",
      "has_results": false,
      "last_update_posted_date": "2022-04-25",
      "last_synced_at": "2026-10-20T17:42:29.308Z",
      "location_count": 1,
      "location_summary": "Charlotte, North Carolina",
      "locations": [
        {
          "city": "Charlotte",
          "state": "North Carolina"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02198768"
    },
    {
      "nct_id": "NCT04542590",
      "title": "Natural History of Patients With PH3 and a History of Stone Events",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Primary Hyperoxaluria Type 3"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "Dicerna Pharmaceuticals, Inc., a Novo Nordisk company",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "2 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "2 Years and older"
      },
      "enrollment_count": 7,
      "start_date": "2021-09-09",
      "completion_date": "2024-07-23",
      "has_results": false,
      "last_update_posted_date": "2024-12-02",
      "last_synced_at": "2026-10-20T17:42:29.308Z",
      "location_count": 2,
      "location_summary": "Boston, Massachusetts • New York, New York",
      "locations": [
        {
          "city": "Boston",
          "state": "Massachusetts"
        },
        {
          "city": "New York",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04542590"
    },
    {
      "nct_id": "NCT00358813",
      "title": "Observational Pharmacokinetic Study Of GW679769 In Subjects With Renal Impairment",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Vomiting"
      ],
      "interventions": [
        {
          "name": "Casopitant",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "GlaxoSmithKline",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "75 Years",
        "sex": "ALL",
        "summary": "18 Years to 75 Years"
      },
      "enrollment_count": 18,
      "start_date": "2006-09-08",
      "completion_date": "2008-08-22",
      "has_results": false,
      "last_update_posted_date": "2017-08-04",
      "last_synced_at": "2026-10-20T17:42:29.308Z",
      "location_count": 3,
      "location_summary": "Miramar, Florida • Orlando, Florida • Minneapolis, Minnesota",
      "locations": [
        {
          "city": "Miramar",
          "state": "Florida"
        },
        {
          "city": "Orlando",
          "state": "Florida"
        },
        {
          "city": "Minneapolis",
          "state": "Minnesota"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00358813"
    },
    {
      "nct_id": "NCT00595491",
      "title": "Pilot Study to Identify the Mediators and Inflammatory Cell Surface Receptors Involved in Allergic Airway Inflammation",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Asthma"
      ],
      "interventions": [
        {
          "name": "Bronchoscopy, Segmental Allergen Challenge, and Broncheoalveolar Lavage",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "Benjamin Medoff",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "50 Years",
        "sex": "ALL",
        "summary": "18 Years to 50 Years"
      },
      "enrollment_count": 313,
      "start_date": "2008-01",
      "completion_date": "2029-01-31",
      "has_results": false,
      "last_update_posted_date": "2025-09-25",
      "last_synced_at": "2026-10-20T17:42:29.308Z",
      "location_count": 1,
      "location_summary": "Boston, Massachusetts",
      "locations": [
        {
          "city": "Boston",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00595491"
    },
    {
      "nct_id": "NCT01946217",
      "title": "Factors Affecting Patient Participation in AIDS Malignancy Clinical Trials Consortium Clinical Trials",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "HIV Infection",
        "Malignant Neoplasm",
        "Precancerous Condition"
      ],
      "interventions": [
        {
          "name": "questionnaire administration",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "AIDS Malignancy Consortium",
      "sponsor_class": "NETWORK",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 82,
      "start_date": "2013-09",
      "completion_date": "2015-09",
      "has_results": false,
      "last_update_posted_date": "2016-08-18",
      "last_synced_at": "2026-10-20T17:42:29.308Z",
      "location_count": 14,
      "location_summary": "Los Angeles, California • Chicago, Illinois • New Orleans, Louisiana + 4 more",
      "locations": [
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "Chicago",
          "state": "Illinois"
        },
        {
          "city": "New Orleans",
          "state": "Louisiana"
        },
        {
          "city": "New Orleans",
          "state": "Louisiana"
        },
        {
          "city": "New Orleans",
          "state": "Louisiana"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01946217"
    },
    {
      "nct_id": "NCT03853291",
      "title": "Developing a Pain Identification and Communication Toolkit",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Dementia",
        "Chronic Pain"
      ],
      "interventions": [
        {
          "name": "PICT Workbook",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Information Pamphlet",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "Weill Medical College of Cornell University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "21 Years",
        "maximum_age": "100 Years",
        "sex": "ALL",
        "summary": "21 Years to 100 Years"
      },
      "enrollment_count": 85,
      "start_date": "2019-03-08",
      "completion_date": "2021-08-11",
      "has_results": true,
      "last_update_posted_date": "2022-06-07",
      "last_synced_at": "2026-10-20T17:42:29.308Z",
      "location_count": 1,
      "location_summary": "New York, New York",
      "locations": [
        {
          "city": "New York",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03853291"
    },
    {
      "nct_id": "NCT03393390",
      "title": "Study of Cognition and Control in Youths",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Attention Deficit Hyperactivity Disorder",
        "Oppositional Defiant Disorder",
        "Conduct Disorder"
      ],
      "interventions": [
        {
          "name": "Clinical Assessment Visit",
          "type": "DIAGNOSTIC_TEST"
        },
        {
          "name": "fMRI scan",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "DIAGNOSTIC_TEST",
        "OTHER"
      ],
      "sponsor": "University of Michigan",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "6 Years",
        "maximum_age": "18 Years",
        "sex": "ALL",
        "summary": "6 Years to 18 Years"
      },
      "enrollment_count": 256,
      "start_date": "2016-03-17",
      "completion_date": "2019-09",
      "has_results": false,
      "last_update_posted_date": "2022-04-14",
      "last_synced_at": "2026-10-20T17:42:29.308Z",
      "location_count": 1,
      "location_summary": "Ann Arbor, Michigan",
      "locations": [
        {
          "city": "Ann Arbor",
          "state": "Michigan"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03393390"
    },
    {
      "nct_id": "NCT05375617",
      "title": "European Prospective Investigation Into Childhood Cancer",
      "overall_status": "RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Acute Lymphoblastic Leukemia",
        "Brain Tumor"
      ],
      "interventions": [
        {
          "name": "Observational",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Columbia University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "3 Years",
        "maximum_age": "21 Years",
        "sex": "ALL",
        "summary": "3 Years to 21 Years"
      },
      "enrollment_count": 1400,
      "start_date": "2023-07-07",
      "completion_date": "2031-03-01",
      "has_results": false,
      "last_update_posted_date": "2026-06-02",
      "last_synced_at": "2026-10-20T17:42:29.308Z",
      "location_count": 1,
      "location_summary": "New York, New York",
      "locations": [
        {
          "city": "New York",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05375617"
    }
  ]
}