{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Observation+Only&page=23",
    "query": {
      "intervention": "Observation Only",
      "page": 23
    },
    "page_size": 10
  },
  "pagination": {
    "page": 23,
    "page_size": 10,
    "total_count": 874,
    "total_pages": 88,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Observation+Only&page=24&page_size=10",
    "previous_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Observation+Only&page=22&page_size=10"
  },
  "source": "remote",
  "last_synced_at": "2026-10-21T11:29:50.926Z",
  "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": "NCT07531498",
      "title": "Muscle Aging Phenotypes in Childhood Cancer Survivors",
      "overall_status": "RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Muscle Weakness",
        "Low Muscle Mass",
        "Sarcopenia"
      ],
      "interventions": [
        {
          "name": "Multimodal Muscle Imaging and Functional Assessment",
          "type": "OTHER"
        },
        {
          "name": "Multimodal Muscle Imaging and Neuromuscular Assessment",
          "type": "OTHER"
        },
        {
          "name": "Comprehensive Muscle Phenotyping",
          "type": "OTHER"
        },
        {
          "name": "Integrated Neuromuscular and Imaging Evaluation",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "St. Jude Children's Research Hospital",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 533,
      "start_date": "2026-09-14",
      "completion_date": "2031-05",
      "has_results": false,
      "last_update_posted_date": "2026-09-16",
      "last_synced_at": "2026-10-21T11:29:50.926Z",
      "location_count": 1,
      "location_summary": "Memphis, Tennessee",
      "locations": [
        {
          "city": "Memphis",
          "state": "Tennessee"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07531498"
    },
    {
      "nct_id": "NCT00051636",
      "title": "Safety and Efficacy Trial With Zoledronic Acid for the Treatment of Paget's Disease of Bone, Including an Extended Observation Period",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Paget's Disease of Bone"
      ],
      "interventions": [
        {
          "name": "Zoledronic Acid",
          "type": "DRUG"
        },
        {
          "name": "Risedronate",
          "type": "DRUG"
        },
        {
          "name": "Placebo to Risedronate",
          "type": "DRUG"
        },
        {
          "name": "Placebo to Zoledronic Acid",
          "type": "DRUG"
        },
        {
          "name": "Calcium and Vitamin D",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DRUG",
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "Novartis Pharmaceuticals",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "30 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "30 Years and older"
      },
      "enrollment_count": 172,
      "start_date": "2001-01",
      "completion_date": "2011-04",
      "has_results": true,
      "last_update_posted_date": "2012-05-15",
      "last_synced_at": "2026-10-21T11:29:50.926Z",
      "location_count": 12,
      "location_summary": "Santa Monica, California • Lakewood, Colorado • Boca Raton, Florida + 9 more",
      "locations": [
        {
          "city": "Santa Monica",
          "state": "California"
        },
        {
          "city": "Lakewood",
          "state": "Colorado"
        },
        {
          "city": "Boca Raton",
          "state": "Florida"
        },
        {
          "city": "Miami",
          "state": "Florida"
        },
        {
          "city": "Maywood",
          "state": "Illinois"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00051636"
    },
    {
      "nct_id": "NCT02320292",
      "title": "Rituximab With or Without Yttrium Y-90 Ibritumomab Tiuxetan in Treating Patients With Untreated Follicular Lymphoma",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Ann Arbor Stage I Grade 1 Follicular Lymphoma",
        "Ann Arbor Stage I Grade 2 Follicular Lymphoma",
        "Ann Arbor Stage II Grade 1 Contiguous Follicular Lymphoma",
        "Ann Arbor Stage II Grade 1 Non-Contiguous Follicular Lymphoma",
        "Ann Arbor Stage II Grade 2 Contiguous Follicular Lymphoma",
        "Ann Arbor Stage II Grade 2 Non-Contiguous Follicular Lymphoma",
        "Ann Arbor Stage III Grade 1 Follicular Lymphoma",
        "Ann Arbor Stage III Grade 2 Follicular Lymphoma",
        "Ann Arbor Stage IV Grade 1 Follicular Lymphoma",
        "Ann Arbor Stage IV Grade 2 Follicular Lymphoma"
      ],
      "interventions": [
        {
          "name": "Quality-of-Life Assessment",
          "type": "OTHER"
        },
        {
          "name": "Rituximab",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Yttrium Y-90 Ibritumomab Tiuxetan",
          "type": "RADIATION"
        }
      ],
      "intervention_types": [
        "OTHER",
        "BIOLOGICAL",
        "RADIATION"
      ],
      "sponsor": "Mayo Clinic",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 20,
      "start_date": "2015-02-11",
      "completion_date": "2023-11-09",
      "has_results": true,
      "last_update_posted_date": "2025-07-09",
      "last_synced_at": "2026-10-21T11:29:50.926Z",
      "location_count": 1,
      "location_summary": "Rochester, Minnesota",
      "locations": [
        {
          "city": "Rochester",
          "state": "Minnesota"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02320292"
    },
    {
      "nct_id": "NCT02963532",
      "title": "Extubation in Pediatric Patients: An Observational Study",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Anesthesia, Pediatric"
      ],
      "interventions": [
        {
          "name": "We are observing criteria present at extubation",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Wake Forest University Health Sciences",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "1 Month",
        "maximum_age": "7 Years",
        "sex": "ALL",
        "summary": "1 Month to 7 Years"
      },
      "enrollment_count": 600,
      "start_date": "2016-12",
      "completion_date": "2017-12-04",
      "has_results": false,
      "last_update_posted_date": "2018-01-08",
      "last_synced_at": "2026-10-21T11:29:50.926Z",
      "location_count": 1,
      "location_summary": "Winston-Salem, North Carolina",
      "locations": [
        {
          "city": "Winston-Salem",
          "state": "North Carolina"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02963532"
    },
    {
      "nct_id": "NCT00669539",
      "title": "Observational Study of Optical Correction for Strabismic Amblyopia in Children 3 to <7 Years Old",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Amblyopia"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "Jaeb Center for Health Research",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "3 Years",
        "maximum_age": "6 Years",
        "sex": "ALL",
        "summary": "3 Years to 6 Years"
      },
      "enrollment_count": 156,
      "start_date": "2008-05",
      "completion_date": "2010-12",
      "has_results": true,
      "last_update_posted_date": "2016-07-13",
      "last_synced_at": "2026-10-21T11:29:50.926Z",
      "location_count": 1,
      "location_summary": "Fullerton, California",
      "locations": [
        {
          "city": "Fullerton",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00669539"
    },
    {
      "nct_id": "NCT03452956",
      "title": "Cognitive Impairement In Frontotemporal Dementia",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Frontotemporal Degeneration",
        "Progressive Supranuclear Palsy",
        "Multiple System Atrophy"
      ],
      "interventions": [
        {
          "name": "None-Observation Only",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "University of Pennsylvania",
      "sponsor_class": "OTHER",
      "healthy_volunteers": null,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 997,
      "start_date": "2003-07-01",
      "completion_date": "2020-07-15",
      "has_results": false,
      "last_update_posted_date": "2020-11-12",
      "last_synced_at": "2026-10-21T11:29:50.926Z",
      "location_count": 1,
      "location_summary": "Philadelphia, Pennsylvania",
      "locations": [
        {
          "city": "Philadelphia",
          "state": "Pennsylvania"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03452956"
    },
    {
      "nct_id": "NCT00954564",
      "title": "Joint Pain and Medication Adherence in Postmenopausal Women Receiving Aromatase Inhibitors",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Arthralgia",
        "Breast Cancer"
      ],
      "interventions": [
        {
          "name": "aromatase inhibition therapy - OBSERVATIONAL ONLY",
          "type": "OTHER"
        },
        {
          "name": "medical chart review",
          "type": "OTHER"
        },
        {
          "name": "questionnaire administration",
          "type": "OTHER"
        },
        {
          "name": "assessment of therapy complications",
          "type": "PROCEDURE"
        }
      ],
      "intervention_types": [
        "OTHER",
        "PROCEDURE"
      ],
      "sponsor": "Vanderbilt University Medical Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "35 Years",
        "maximum_age": "90 Years",
        "sex": "FEMALE",
        "summary": "35 Years to 90 Years · Female only"
      },
      "enrollment_count": 351,
      "start_date": "2009-06",
      "completion_date": "2014-05",
      "has_results": false,
      "last_update_posted_date": "2017-04-04",
      "last_synced_at": "2026-10-21T11:29:50.926Z",
      "location_count": 2,
      "location_summary": "Nashville, Tennessee",
      "locations": [
        {
          "city": "Nashville",
          "state": "Tennessee"
        },
        {
          "city": "Nashville",
          "state": "Tennessee"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00954564"
    },
    {
      "nct_id": "NCT06775106",
      "title": "Exhaled Breath: A Novel Technique for Rapid Diagnosis of Respiratory Diseases and Infections",
      "overall_status": "RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Pulmonary Disease",
        "Critical Illness"
      ],
      "interventions": [
        {
          "name": "There is no intervention in this observational study",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Oregon Health and Science University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "120 Years",
        "sex": "ALL",
        "summary": "18 Years to 120 Years"
      },
      "enrollment_count": 100,
      "start_date": "2024-11-30",
      "completion_date": "2026-12-31",
      "has_results": false,
      "last_update_posted_date": "2025-01-14",
      "last_synced_at": "2026-10-21T11:29:50.926Z",
      "location_count": 1,
      "location_summary": "Portland, Oregon",
      "locations": [
        {
          "city": "Portland",
          "state": "Oregon"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06775106"
    },
    {
      "nct_id": "NCT02953704",
      "title": "Myelofibrosis and Essential Thrombocythemia Observational Study (MOST)",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "MPN (Myeloproliferative Neoplasms)"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "Incyte Corporation",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 1469,
      "start_date": "2016-12-31",
      "completion_date": "2022-03-29",
      "has_results": false,
      "last_update_posted_date": "2022-05-13",
      "last_synced_at": "2026-10-21T11:29:50.926Z",
      "location_count": 114,
      "location_summary": "Huntsville, Alabama • Tempe, Arizona • Tucson, Arizona + 111 more",
      "locations": [
        {
          "city": "Huntsville",
          "state": "Alabama"
        },
        {
          "city": "Tempe",
          "state": "Arizona"
        },
        {
          "city": "Tucson",
          "state": "Arizona"
        },
        {
          "city": "Little Rock",
          "state": "Arkansas"
        },
        {
          "city": "Berkeley",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02953704"
    },
    {
      "nct_id": "NCT04517149",
      "title": "4D-125 in Patients With X-Linked Retinitis Pigmentosa (XLRP)",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1",
        "PHASE2"
      ],
      "conditions": [
        "X-Linked Retinitis Pigmentosa"
      ],
      "interventions": [
        {
          "name": "4D-125 IVT Injection",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Observational",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL",
        "OTHER"
      ],
      "sponsor": "4D Molecular Therapeutics",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "12 Years",
        "maximum_age": null,
        "sex": "MALE",
        "summary": "12 Years and older · Male only"
      },
      "enrollment_count": 21,
      "start_date": "2020-06-09",
      "completion_date": "2029-05",
      "has_results": false,
      "last_update_posted_date": "2025-03-21",
      "last_synced_at": "2026-10-21T11:29:50.926Z",
      "location_count": 8,
      "location_summary": "Aurora, Colorado • Gainesville, Florida • Ann Arbor, Michigan + 5 more",
      "locations": [
        {
          "city": "Aurora",
          "state": "Colorado"
        },
        {
          "city": "Gainesville",
          "state": "Florida"
        },
        {
          "city": "Ann Arbor",
          "state": "Michigan"
        },
        {
          "city": "New York",
          "state": "New York"
        },
        {
          "city": "Durham",
          "state": "North Carolina"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04517149"
    }
  ]
}