{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=observational+study&page=19",
    "query": {
      "intervention": "observational study",
      "page": 19
    },
    "page_size": 10
  },
  "pagination": {
    "page": 19,
    "page_size": 10,
    "total_count": 4385,
    "total_pages": 439,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=observational+study&page=20&page_size=10",
    "previous_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=observational+study&page=18&page_size=10"
  },
  "source": "remote",
  "last_synced_at": "2026-10-19T20:20:01.148Z",
  "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": "NCT00909584",
      "title": "Study of Ezatiostat (Telintra Tablets) for Treatment of Severe Chronic Neutropenia",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Severe Chronic Neutropenia"
      ],
      "interventions": [
        {
          "name": "Ezatiostat Hydrochloride",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Telik",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 9,
      "start_date": "2009-04",
      "completion_date": "2013-05",
      "has_results": false,
      "last_update_posted_date": "2013-11-25",
      "last_synced_at": "2026-10-19T20:20:01.148Z",
      "location_count": 4,
      "location_summary": "Bethesda, Maryland • Ann Arbor, Michigan • San Antonio, Texas + 1 more",
      "locations": [
        {
          "city": "Bethesda",
          "state": "Maryland"
        },
        {
          "city": "Ann Arbor",
          "state": "Michigan"
        },
        {
          "city": "San Antonio",
          "state": "Texas"
        },
        {
          "city": "Seattle",
          "state": "Washington"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00909584"
    },
    {
      "nct_id": "NCT05478265",
      "title": "Patient Observational Pain and Activity Survey (POPAS) Study Using RS-4i Sequential Stimulator With Intersperse Technology in Axial Spine and Peripheral Joint Pain",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Osteoarthritis"
      ],
      "interventions": [
        {
          "name": "RS-4i Plus",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "University of California, Irvine",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "89 Years",
        "sex": "ALL",
        "summary": "18 Years to 89 Years"
      },
      "enrollment_count": 69,
      "start_date": "2023-01-09",
      "completion_date": "2024-06-30",
      "has_results": false,
      "last_update_posted_date": "2025-06-08",
      "last_synced_at": "2026-10-19T20:20:01.148Z",
      "location_count": 1,
      "location_summary": "Orange, California",
      "locations": [
        {
          "city": "Orange",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05478265"
    },
    {
      "nct_id": "NCT04485221",
      "title": "TECPR2 Observational Study",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "TECPR2"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "University of Florida",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Months",
        "maximum_age": "12 Years",
        "sex": "ALL",
        "summary": "18 Months to 12 Years"
      },
      "enrollment_count": 5,
      "start_date": "2021-01-20",
      "completion_date": "2023-08-17",
      "has_results": false,
      "last_update_posted_date": "2023-09-11",
      "last_synced_at": "2026-10-19T20:20:01.148Z",
      "location_count": 1,
      "location_summary": "Gainesville, Florida",
      "locations": [
        {
          "city": "Gainesville",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04485221"
    },
    {
      "nct_id": "NCT02206399",
      "title": "Non-Invasive Hemoglobin Study",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Anemia"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "Convergence Biometrics",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 237,
      "start_date": "2014-08",
      "completion_date": "2014-11",
      "has_results": false,
      "last_update_posted_date": "2016-06-27",
      "last_synced_at": "2026-10-19T20:20:01.148Z",
      "location_count": 1,
      "location_summary": "Sacramento, California",
      "locations": [
        {
          "city": "Sacramento",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02206399"
    },
    {
      "nct_id": "NCT01272232",
      "title": "Effect of Liraglutide on Body Weight in Overweight or Obese Subjects With Type 2 Diabetes: SCALE™ - Diabetes",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Metabolism and Nutrition Disorder",
        "Obesity"
      ],
      "interventions": [
        {
          "name": "liraglutide",
          "type": "DRUG"
        },
        {
          "name": "placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Novo Nordisk A/S",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 846,
      "start_date": "2011-06-01",
      "completion_date": "2013-01-25",
      "has_results": true,
      "last_update_posted_date": "2017-12-29",
      "last_synced_at": "2026-10-19T20:20:01.148Z",
      "location_count": 67,
      "location_summary": "Vestavia Hills, Alabama • Peoria, Arizona • Jonesboro, Arkansas + 57 more",
      "locations": [
        {
          "city": "Vestavia Hills",
          "state": "Alabama"
        },
        {
          "city": "Peoria",
          "state": "Arizona"
        },
        {
          "city": "Jonesboro",
          "state": "Arkansas"
        },
        {
          "city": "Concord",
          "state": "California"
        },
        {
          "city": "Long Beach",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01272232"
    },
    {
      "nct_id": "NCT00935883",
      "title": "Complement Inhibition With Eculizumab for the Treatment of Non-Exudative Macular Degeneration (AMD)",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Age-Related Macular Degeneration"
      ],
      "interventions": [
        {
          "name": "Eculizumab",
          "type": "DRUG"
        },
        {
          "name": "Saline",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Philip J. Rosenfeld, MD, PhD",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "50 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "50 Years and older"
      },
      "enrollment_count": 60,
      "start_date": "2009-07",
      "completion_date": "2013-08",
      "has_results": true,
      "last_update_posted_date": "2017-05-30",
      "last_synced_at": "2026-10-19T20:20:01.148Z",
      "location_count": 1,
      "location_summary": "Miami, Florida",
      "locations": [
        {
          "city": "Miami",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00935883"
    },
    {
      "nct_id": "NCT06429280",
      "title": "Clinical Data Registry of Amblyopia Patients on Luminopia Treatment",
      "overall_status": "RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Amblyopia"
      ],
      "interventions": [
        {
          "name": "N/A this is an observational study of Standard of Care",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "Luminopia",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": null,
        "sex": "ALL",
        "summary": "Not listed"
      },
      "enrollment_count": 500,
      "start_date": "2023-09-01",
      "completion_date": "2026-12-31",
      "has_results": false,
      "last_update_posted_date": "2025-09-12",
      "last_synced_at": "2026-10-19T20:20:01.148Z",
      "location_count": 13,
      "location_summary": "San Ramon, California • Santa Barbara, California • Crestview, Florida + 10 more",
      "locations": [
        {
          "city": "San Ramon",
          "state": "California"
        },
        {
          "city": "Santa Barbara",
          "state": "California"
        },
        {
          "city": "Crestview",
          "state": "Florida"
        },
        {
          "city": "Gainsville",
          "state": "Florida"
        },
        {
          "city": "Maitland",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06429280"
    },
    {
      "nct_id": "NCT02301832",
      "title": "Reliability of Sensor Spacing for NIRS in Traumatic Tibia Fractures",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Orthopedic Disorders",
        "Tibial Fractures"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "Emory University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "65 Years",
        "sex": "ALL",
        "summary": "18 Years to 65 Years"
      },
      "enrollment_count": 14,
      "start_date": "2014-12",
      "completion_date": "2016-07-20",
      "has_results": false,
      "last_update_posted_date": "2017-02-06",
      "last_synced_at": "2026-10-19T20:20:01.148Z",
      "location_count": 1,
      "location_summary": "Atlanta, Georgia",
      "locations": [
        {
          "city": "Atlanta",
          "state": "Georgia"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02301832"
    },
    {
      "nct_id": "NCT04956198",
      "title": "Drug Sensitivity and Mutation Profiling",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Ewing Sarcoma",
        "Osteosarcoma",
        "Rhabdomyosarcoma",
        "Wilms Tumor",
        "Sarcoma, Spindle Cell",
        "Sarcoma Rhabdoid",
        "Childhood Sarcoma of Soft Tissue"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "Florida International University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": null,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": "21 Years",
        "sex": "ALL",
        "summary": "Up to 21 Years"
      },
      "enrollment_count": 14,
      "start_date": "2020-11-17",
      "completion_date": "2022-12-31",
      "has_results": false,
      "last_update_posted_date": "2023-02-14",
      "last_synced_at": "2026-10-19T20:20:01.148Z",
      "location_count": 1,
      "location_summary": "Miami, Florida",
      "locations": [
        {
          "city": "Miami",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04956198"
    },
    {
      "nct_id": "NCT07203482",
      "title": "Clinical Outcomes in Prostate Cancer Patients Undergoing HIFU Ablation",
      "overall_status": "RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Prostate Cancer"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "NYU Langone Health",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "40 Years",
        "maximum_age": "95 Years",
        "sex": "MALE",
        "summary": "40 Years to 95 Years · Male only"
      },
      "enrollment_count": 300,
      "start_date": "2024-05-16",
      "completion_date": "2050-12-31",
      "has_results": false,
      "last_update_posted_date": "2026-07-30",
      "last_synced_at": "2026-10-19T20:20:01.148Z",
      "location_count": 2,
      "location_summary": "Brooklyn, New York • New York, New York",
      "locations": [
        {
          "city": "Brooklyn",
          "state": "New York"
        },
        {
          "city": "New York",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07203482"
    }
  ]
}