{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?condition=Observational+Study&page=3",
    "query": {
      "condition": "Observational Study",
      "page": 3
    },
    "page_size": 10
  },
  "pagination": {
    "page": 3,
    "page_size": 10,
    "total_count": 2011,
    "total_pages": 202,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?condition=Observational+Study&page=4&page_size=10",
    "previous_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?condition=Observational+Study&page=2&page_size=10"
  },
  "source": "remote",
  "last_synced_at": "2026-10-30T01:53:11.803Z",
  "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": "NCT02701192",
      "title": "Management of Coccydynia: A Prospective, Observational Study of Coccygectomy",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Coccygodynia"
      ],
      "interventions": [
        {
          "name": "Coccygectomy",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "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": 100,
      "start_date": "2007-09",
      "completion_date": "2016-10",
      "has_results": true,
      "last_update_posted_date": "2022-04-22",
      "last_synced_at": "2026-10-30T01:53:11.803Z",
      "location_count": 1,
      "location_summary": "Charlotte, North Carolina",
      "locations": [
        {
          "city": "Charlotte",
          "state": "North Carolina"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02701192"
    },
    {
      "nct_id": "NCT01613599",
      "title": "An Observational Study of The Safety of MabThera/Rituxan (Rituximab) in Participants With Granulomatosis With Polyangiitis (Wegener's) or Microscopic Polyangiitis",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Granulomatosis With Polyangiitis",
        "Microscopic Polyangiitis"
      ],
      "interventions": [
        {
          "name": "Rituximab",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Genentech, Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 100,
      "start_date": "2012-06-20",
      "completion_date": "2017-04-28",
      "has_results": true,
      "last_update_posted_date": "2018-07-26",
      "last_synced_at": "2026-10-30T01:53:11.803Z",
      "location_count": 15,
      "location_summary": "Scottsdale, Arizona • Los Angeles, California • Jacksonville, Florida + 11 more",
      "locations": [
        {
          "city": "Scottsdale",
          "state": "Arizona"
        },
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "Jacksonville",
          "state": "Florida"
        },
        {
          "city": "Chicago",
          "state": "Illinois"
        },
        {
          "city": "Baltimore",
          "state": "Maryland"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01613599"
    },
    {
      "nct_id": "NCT05170412",
      "title": "Dietary Intake and Dietary Behaviors in Adults With Sickle Cell Disease",
      "overall_status": "RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Sickle Cell Disease"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "National Institutes of Health Clinical Center (CC)",
      "sponsor_class": "NIH",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "120 Years",
        "sex": "ALL",
        "summary": "18 Years to 120 Years"
      },
      "enrollment_count": 80,
      "start_date": "2022-05-26",
      "completion_date": "2027-12-31",
      "has_results": false,
      "last_update_posted_date": "2026-09-18",
      "last_synced_at": "2026-10-30T01:53:11.803Z",
      "location_count": 1,
      "location_summary": "Bethesda, Maryland",
      "locations": [
        {
          "city": "Bethesda",
          "state": "Maryland"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05170412"
    },
    {
      "nct_id": "NCT02102971",
      "title": "Observational Study of Biomarker During Liver Surgery",
      "overall_status": "TERMINATED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Liver Cancer",
        "Hepatobiliary Tract Adenomas and Carcinomas"
      ],
      "interventions": [
        {
          "name": "Hepatocellular carcinoma",
          "type": "PROCEDURE"
        }
      ],
      "intervention_types": [
        "PROCEDURE"
      ],
      "sponsor": "University of Florida",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "70 Years",
        "sex": "ALL",
        "summary": "18 Years to 70 Years"
      },
      "enrollment_count": 41,
      "start_date": "2014-10",
      "completion_date": "2019-06-06",
      "has_results": false,
      "last_update_posted_date": "2019-09-25",
      "last_synced_at": "2026-10-30T01:53:11.803Z",
      "location_count": 1,
      "location_summary": "Gainesville, Florida",
      "locations": [
        {
          "city": "Gainesville",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02102971"
    },
    {
      "nct_id": "NCT06256367",
      "title": "Observational Study of Oral Cariprazine Capsules to Assess Change in Disease Activity in Adult Participants With Bipolar I Disorder",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Bipolar I Disorder"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "AbbVie",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 120,
      "start_date": "2024-04-18",
      "completion_date": "2026-01-23",
      "has_results": false,
      "last_update_posted_date": "2026-02-24",
      "last_synced_at": "2026-10-30T01:53:11.803Z",
      "location_count": 11,
      "location_summary": "Birmingham, Alabama • Beverly Hills, California • Sacramento, California + 8 more",
      "locations": [
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Beverly Hills",
          "state": "California"
        },
        {
          "city": "Sacramento",
          "state": "California"
        },
        {
          "city": "Cromwell",
          "state": "Connecticut"
        },
        {
          "city": "Atlanta",
          "state": "Georgia"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06256367"
    },
    {
      "nct_id": "NCT05375097",
      "title": "Real-world Impact of Erenumab on Sick-leaves, Health Care Resource Use and Comorbidities.",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Migraine"
      ],
      "interventions": [
        {
          "name": "Erenumab",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Novartis Pharmaceuticals",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "100 Years",
        "sex": "ALL",
        "summary": "18 Years to 100 Years"
      },
      "enrollment_count": 162,
      "start_date": "2020-07-03",
      "completion_date": "2021-05-14",
      "has_results": false,
      "last_update_posted_date": "2022-07-01",
      "last_synced_at": "2026-10-30T01:53:11.803Z",
      "location_count": 1,
      "location_summary": "East Hanover, New Jersey",
      "locations": [
        {
          "city": "East Hanover",
          "state": "New Jersey"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05375097"
    },
    {
      "nct_id": "NCT06212479",
      "title": "An Observational Study On TheAccuracy Of Whole-Body Magnetic Resonance Imaging (Wb-Mri) ScreeningTo Predict Clinically Significant Diagnoses In General Population Subjects Interested In Proactive And Advanced General Preventive Healthcare.",
      "overall_status": "RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Cancer",
        "Metabolic Disease",
        "Aneurysm",
        "Neurologic Disorder"
      ],
      "interventions": [
        {
          "name": "MRI Scan",
          "type": "DIAGNOSTIC_TEST"
        }
      ],
      "intervention_types": [
        "DIAGNOSTIC_TEST"
      ],
      "sponsor": "Hercules",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 100000,
      "start_date": "2024-05-17",
      "completion_date": "2037-01",
      "has_results": false,
      "last_update_posted_date": "2025-04-30",
      "last_synced_at": "2026-10-30T01:53:11.803Z",
      "location_count": 1,
      "location_summary": "Watertown, Massachusetts",
      "locations": [
        {
          "city": "Watertown",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06212479"
    },
    {
      "nct_id": "NCT03522324",
      "title": "Pain Research: Innovative Strategies With Marijuana",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Chronic Pain",
        "Chronic Low Back Pain",
        "Cannabis Use"
      ],
      "interventions": [
        {
          "name": "Cannabis Edible",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "University of Colorado, Boulder",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "21 Years",
        "maximum_age": "70 Years",
        "sex": "ALL",
        "summary": "21 Years to 70 Years"
      },
      "enrollment_count": 268,
      "start_date": "2018-06-01",
      "completion_date": "2023-10-12",
      "has_results": true,
      "last_update_posted_date": "2025-08-27",
      "last_synced_at": "2026-10-30T01:53:11.803Z",
      "location_count": 1,
      "location_summary": "Boulder, Colorado",
      "locations": [
        {
          "city": "Boulder",
          "state": "Colorado"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03522324"
    },
    {
      "nct_id": "NCT00974623",
      "title": "Bone Graft Materials Observational Registry",
      "overall_status": "TERMINATED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Degenerative Disc Disease",
        "Herniated Disc",
        "Spinal Stenosis",
        "Spondylolithesis",
        "Spinal Deformity",
        "Cervical Myelopathy",
        "Failed Back Surgery Syndrome",
        "Spinal Cord Neoplasms"
      ],
      "interventions": [
        {
          "name": "Bone graft substitute, autograft or allograft",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "Baxter Healthcare Corporation",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 329,
      "start_date": "2009-09",
      "completion_date": "2013-11",
      "has_results": false,
      "last_update_posted_date": "2017-04-05",
      "last_synced_at": "2026-10-30T01:53:11.803Z",
      "location_count": 12,
      "location_summary": "San Francisco, California • Atlanta, Georgia • Carrollton, Georgia + 9 more",
      "locations": [
        {
          "city": "San Francisco",
          "state": "California"
        },
        {
          "city": "Atlanta",
          "state": "Georgia"
        },
        {
          "city": "Carrollton",
          "state": "Georgia"
        },
        {
          "city": "Lexington",
          "state": "Kentucky"
        },
        {
          "city": "Worcester",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00974623"
    },
    {
      "nct_id": "NCT06605378",
      "title": "Prevalence of Antibodies and Cytokines in Participants With Chronic Granulomatous Disease",
      "overall_status": "RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Chronic Granulomatous Disease (CGD)"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "Ensoma",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": null,
        "sex": "ALL",
        "summary": "Not listed"
      },
      "enrollment_count": 60,
      "start_date": "2024-11-18",
      "completion_date": "2026-12",
      "has_results": false,
      "last_update_posted_date": "2026-08-17",
      "last_synced_at": "2026-10-30T01:53:11.803Z",
      "location_count": 50,
      "location_summary": "Montgomery, Alabama • Phoenix, Arizona • Little Rock, Arkansas + 47 more",
      "locations": [
        {
          "city": "Montgomery",
          "state": "Alabama"
        },
        {
          "city": "Phoenix",
          "state": "Arizona"
        },
        {
          "city": "Little Rock",
          "state": "Arkansas"
        },
        {
          "city": "Sacramento",
          "state": "California"
        },
        {
          "city": "San Francisco",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06605378"
    }
  ]
}