{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Observational+study&page=16",
    "query": {
      "intervention": "Observational study",
      "page": 16
    },
    "page_size": 10
  },
  "pagination": {
    "page": 16,
    "page_size": 10,
    "total_count": 4385,
    "total_pages": 439,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Observational+study&page=17&page_size=10",
    "previous_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Observational+study&page=15&page_size=10"
  },
  "source": "remote",
  "last_synced_at": "2026-10-18T09:04:00.537Z",
  "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": "NCT04553757",
      "title": "Seizure Control as a New Metric in Assessing Efficacy of Tumor Treatment in Patients With Low Grade Glioma",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Brain Neoplasm",
        "Low Grade Glioma",
        "Seizure Disorder"
      ],
      "interventions": [
        {
          "name": "Survey Administration",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "M.D. Anderson Cancer Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": null,
        "sex": "ALL",
        "summary": "Not listed"
      },
      "enrollment_count": 100,
      "start_date": "2020-07-08",
      "completion_date": "2027-12-30",
      "has_results": false,
      "last_update_posted_date": "2026-10-07",
      "last_synced_at": "2026-10-18T09:04:00.537Z",
      "location_count": 1,
      "location_summary": "Houston, Texas",
      "locations": [
        {
          "city": "Houston",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04553757"
    },
    {
      "nct_id": "NCT05273801",
      "title": "Assessing Visual Feedback of HR Monitoring in Rehabilitation - Pilot",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Exercise Therapy",
        "Heart Rate Determination"
      ],
      "interventions": [
        {
          "name": "Heart Rate Recording from Multiple Participants, No Visual Feedback",
          "type": "DEVICE"
        },
        {
          "name": "Visual Feedback of Multiple Participant Heart Rates",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "Shirley Ryan AbilityLab",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "90 Years",
        "sex": "ALL",
        "summary": "18 Years to 90 Years"
      },
      "enrollment_count": 18,
      "start_date": "2022-01-28",
      "completion_date": "2022-05-01",
      "has_results": true,
      "last_update_posted_date": "2024-12-02",
      "last_synced_at": "2026-10-18T09:04:00.537Z",
      "location_count": 1,
      "location_summary": "Chicago, Illinois",
      "locations": [
        {
          "city": "Chicago",
          "state": "Illinois"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05273801"
    },
    {
      "nct_id": "NCT07141277",
      "title": "GRANITE: Airsupra Effectiveness in the Real World",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Asthma"
      ],
      "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": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 4060,
      "start_date": "2025-07-09",
      "completion_date": "2026-03-20",
      "has_results": false,
      "last_update_posted_date": "2026-06-12",
      "last_synced_at": "2026-10-18T09:04:00.537Z",
      "location_count": 1,
      "location_summary": "Wilmington, Delaware",
      "locations": [
        {
          "city": "Wilmington",
          "state": "Delaware"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07141277"
    },
    {
      "nct_id": "NCT00075101",
      "title": "Sleep, Fatigue, and Dexamethosone in Children With Leukemia",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Leukemia"
      ],
      "interventions": [
        {
          "name": "Dexamethosone",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "National Institute of Nursing Research (NINR)",
      "sponsor_class": "NIH",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "5 Years",
        "maximum_age": "21 Years",
        "sex": "ALL",
        "summary": "5 Years to 21 Years"
      },
      "enrollment_count": 134,
      "start_date": "2000-09",
      "completion_date": "2006-09",
      "has_results": false,
      "last_update_posted_date": "2008-08-18",
      "last_synced_at": "2026-10-18T09:04:00.537Z",
      "location_count": 1,
      "location_summary": "Memphis, Tennessee",
      "locations": [
        {
          "city": "Memphis",
          "state": "Tennessee"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00075101"
    },
    {
      "nct_id": "NCT04135365",
      "title": "Pediatric Type 1 Diabetes and Neurocognitive Complications Cohort Study",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Type 1 Diabetes"
      ],
      "interventions": [
        {
          "name": "neurocognitive assessment",
          "type": "BEHAVIORAL"
        },
        {
          "name": "neuroimaging assessment",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "Vanderbilt University Medical Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "6 Years",
        "maximum_age": "11 Years",
        "sex": "ALL",
        "summary": "6 Years to 11 Years"
      },
      "enrollment_count": 12,
      "start_date": "2021-01-18",
      "completion_date": "2022-10-31",
      "has_results": false,
      "last_update_posted_date": "2022-11-01",
      "last_synced_at": "2026-10-18T09:04:00.537Z",
      "location_count": 1,
      "location_summary": "Nashville, Tennessee",
      "locations": [
        {
          "city": "Nashville",
          "state": "Tennessee"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04135365"
    },
    {
      "nct_id": "NCT01569867",
      "title": "Genetic Influences on Statin Blood Concentrations in African Americans",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Hyperlipidemia",
        "Hypercholesterolemia",
        "Dyslipidemia"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "Ohio State University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 501,
      "start_date": "2012-03",
      "completion_date": "2022-04-20",
      "has_results": false,
      "last_update_posted_date": "2022-10-13",
      "last_synced_at": "2026-10-18T09:04:00.537Z",
      "location_count": 1,
      "location_summary": "Columbus, Ohio",
      "locations": [
        {
          "city": "Columbus",
          "state": "Ohio"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01569867"
    },
    {
      "nct_id": "NCT06710067",
      "title": "Urine Metabolites in the Diagnosis of Disease",
      "overall_status": "RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Colorectal Cancer",
        "Small Intestinal Bacterial Overgrowth Syndrome (SIBO)",
        "Crohn Disease",
        "Celiac Disease"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "Luventix, Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 1250,
      "start_date": "2024-10-01",
      "completion_date": "2026-09",
      "has_results": false,
      "last_update_posted_date": "2024-12-13",
      "last_synced_at": "2026-10-18T09:04:00.537Z",
      "location_count": 4,
      "location_summary": "Encinitas, California • Santa Monica, California • Walnut Creek, California",
      "locations": [
        {
          "city": "Encinitas",
          "state": "California"
        },
        {
          "city": "Santa Monica",
          "state": "California"
        },
        {
          "city": "Santa Monica",
          "state": "California"
        },
        {
          "city": "Walnut Creek",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06710067"
    },
    {
      "nct_id": "NCT04107766",
      "title": "NOLA (NeuWave Observational Liver Ablation) Registry",
      "overall_status": "TERMINATED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Cancer of the Liver",
        "Liver Cancer",
        "Neoplasms, Liver"
      ],
      "interventions": [
        {
          "name": "Microwave Ablation",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "Ethicon, Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "22 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "22 Years and older"
      },
      "enrollment_count": 1254,
      "start_date": "2020-01-15",
      "completion_date": "2025-06-18",
      "has_results": true,
      "last_update_posted_date": "2026-04-17",
      "last_synced_at": "2026-10-18T09:04:00.537Z",
      "location_count": 14,
      "location_summary": "Loma Linda, California • Los Angeles, California • Sacramento, California + 9 more",
      "locations": [
        {
          "city": "Loma Linda",
          "state": "California"
        },
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "Sacramento",
          "state": "California"
        },
        {
          "city": "Sylmar",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04107766"
    },
    {
      "nct_id": "NCT02513056",
      "title": "Study Evaluating the Use of MRI on CMS Patients",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Pacemaker",
        "Implantable Cardioverter Defibrillators"
      ],
      "interventions": [
        {
          "name": "MRI",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "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": 872,
      "start_date": "2015-08-17",
      "completion_date": "2022-02-01",
      "has_results": false,
      "last_update_posted_date": "2024-05-14",
      "last_synced_at": "2026-10-18T09:04:00.537Z",
      "location_count": 1,
      "location_summary": "Philadelphia, Pennsylvania",
      "locations": [
        {
          "city": "Philadelphia",
          "state": "Pennsylvania"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02513056"
    },
    {
      "nct_id": "NCT01652157",
      "title": "Long-term Study in US Cystic Fibrosis Patients Receiving Digestive Enzyme Supplements to Assess Narrowing of the Large Intestine Causing Adverse Intestinal Symptoms (Fibrosing Colonopathy)",
      "overall_status": "TERMINATED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Fibrosing Colonopathy"
      ],
      "interventions": [
        {
          "name": "ULTRESA",
          "type": "BIOLOGICAL"
        },
        {
          "name": "PANCREAZE",
          "type": "BIOLOGICAL"
        },
        {
          "name": "CREON",
          "type": "BIOLOGICAL"
        },
        {
          "name": "ZENPEP",
          "type": "BIOLOGICAL"
        },
        {
          "name": "other non-sponsor pancreatic enzyme replacement therapy",
          "type": "BIOLOGICAL"
        },
        {
          "name": "PERTZYE",
          "type": "BIOLOGICAL"
        },
        {
          "name": "No pancreatic enzyme replacement therapy",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL",
        "OTHER"
      ],
      "sponsor": "AbbVie",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "0 Months",
        "maximum_age": "99 Years",
        "sex": "ALL",
        "summary": "0 Months to 99 Years"
      },
      "enrollment_count": 17,
      "start_date": "2012-07-31",
      "completion_date": "2020-04-08",
      "has_results": false,
      "last_update_posted_date": "2021-03-22",
      "last_synced_at": "2026-10-18T09:04:00.537Z",
      "location_count": 123,
      "location_summary": "Birmingham, Alabama • Anchorage, Alaska • Phoenix, Arizona + 102 more",
      "locations": [
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Anchorage",
          "state": "Alaska"
        },
        {
          "city": "Phoenix",
          "state": "Arizona"
        },
        {
          "city": "Tucson",
          "state": "Arizona"
        },
        {
          "city": "Little Rock",
          "state": "Arkansas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01652157"
    }
  ]
}