{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Observation+Group+participants&page=2",
    "query": {
      "intervention": "Observation Group participants",
      "page": 2
    },
    "page_size": 10
  },
  "pagination": {
    "page": 2,
    "page_size": 10,
    "total_count": 334,
    "total_pages": 34,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Observation+Group+participants&page=3&page_size=10",
    "previous_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Observation+Group+participants&page=1&page_size=10"
  },
  "source": "remote",
  "last_synced_at": "2026-09-30T05:55:00.631Z",
  "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": "NCT04440098",
      "title": "Isolated During COVID-19: Effects of COVID-19's Social Restrictions on Loneliness and Psychosocial Symptomatology",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Loneliness",
        "Depression",
        "Anxiety",
        "Alcohol Abuse",
        "Drug Abuse"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "University of Miami",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "35 Years",
        "sex": "ALL",
        "summary": "18 Years to 35 Years"
      },
      "enrollment_count": 1008,
      "start_date": "2020-04-22",
      "completion_date": "2020-05-11",
      "has_results": false,
      "last_update_posted_date": "2020-06-19",
      "last_synced_at": "2026-09-30T05:55:00.631Z",
      "location_count": 1,
      "location_summary": "Miami, Florida",
      "locations": [
        {
          "city": "Miami",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04440098"
    },
    {
      "nct_id": "NCT05840484",
      "title": "Comprehensive Monitoring of Men With Prostate Cancer Cared for by \"Active Surveillance",
      "overall_status": "RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Prostate Cancer"
      ],
      "interventions": [
        {
          "name": "Active Surveillance",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "M.D. Anderson Cancer Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "MALE",
        "summary": "18 Years and older · Male only"
      },
      "enrollment_count": 100,
      "start_date": "2023-03-29",
      "completion_date": "2029-07-30",
      "has_results": false,
      "last_update_posted_date": "2026-08-10",
      "last_synced_at": "2026-09-30T05:55:00.631Z",
      "location_count": 1,
      "location_summary": "Houston, Texas",
      "locations": [
        {
          "city": "Houston",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05840484"
    },
    {
      "nct_id": "NCT01522235",
      "title": "Evaluating the Effectiveness of Intravenous Immunoglobulin Therapy in Autoimmune Autonomic Ganglionopathy",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2",
        "PHASE3"
      ],
      "conditions": [
        "Autoimmune Autonomic Ganglionopathy (AAG)"
      ],
      "interventions": [
        {
          "name": "Double blinded IVIg",
          "type": "DRUG"
        },
        {
          "name": "Double blinded Placebo",
          "type": "OTHER"
        },
        {
          "name": "Single Blinded IVIg",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "DRUG",
        "OTHER"
      ],
      "sponsor": "Beth Israel Deaconess Medical Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "85 Years",
        "sex": "ALL",
        "summary": "18 Years to 85 Years"
      },
      "enrollment_count": 6,
      "start_date": "2012-02",
      "completion_date": "2015-09",
      "has_results": true,
      "last_update_posted_date": "2017-07-02",
      "last_synced_at": "2026-09-30T05:55:00.631Z",
      "location_count": 6,
      "location_summary": "Bethesda, Maryland • Boston, Massachusetts • Rochester, Minnesota + 3 more",
      "locations": [
        {
          "city": "Bethesda",
          "state": "Maryland"
        },
        {
          "city": "Boston",
          "state": "Massachusetts"
        },
        {
          "city": "Rochester",
          "state": "Minnesota"
        },
        {
          "city": "New York",
          "state": "New York"
        },
        {
          "city": "Nashville",
          "state": "Tennessee"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01522235"
    },
    {
      "nct_id": "NCT06085625",
      "title": "A Randomized Control Trial for Patient Reported Outcomes and Safety in Outpatient Thyroid Lobectomy",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Thyroid Lobectomy"
      ],
      "interventions": [
        {
          "name": "Pre-Surgery Survey",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Post-Surgery Surveys",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "M.D. Anderson Cancer Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 224,
      "start_date": "2024-11-26",
      "completion_date": "2027-11-01",
      "has_results": false,
      "last_update_posted_date": "2026-05-20",
      "last_synced_at": "2026-09-30T05:55:00.631Z",
      "location_count": 1,
      "location_summary": "Houston, Texas",
      "locations": [
        {
          "city": "Houston",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06085625"
    },
    {
      "nct_id": "NCT04394871",
      "title": "Clinical Manifestations and Biomarkers in Amyotrophic Lateral Sclerosis Type 4 and Other Inherited Neurological Disorders of RNA Processing",
      "overall_status": "RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Amyotrophic Lateral Sclerosis Type 4",
        "Inherited Neurological Disorders of RNA Processing"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "National Institute of Neurological Disorders and Stroke (NINDS)",
      "sponsor_class": "NIH",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "5 Years",
        "maximum_age": "120 Years",
        "sex": "ALL",
        "summary": "5 Years to 120 Years"
      },
      "enrollment_count": 330,
      "start_date": "2020-12-14",
      "completion_date": "2030-12-31",
      "has_results": false,
      "last_update_posted_date": "2026-09-28",
      "last_synced_at": "2026-09-30T05:55:00.631Z",
      "location_count": 1,
      "location_summary": "Bethesda, Maryland",
      "locations": [
        {
          "city": "Bethesda",
          "state": "Maryland"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04394871"
    },
    {
      "nct_id": "NCT06721611",
      "title": "A Comprehensive Optical Blood Pressure Assessment Tool to Identify Cases of Unscreened Hypertension Across an Active Population in the U.S.",
      "overall_status": "WITHDRAWN",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Hypertension"
      ],
      "interventions": [
        {
          "name": "Optical Blood Pressure Monitoring Device (Aktiia G1)",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "Nucor",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "25 Years",
        "maximum_age": "70 Years",
        "sex": "ALL",
        "summary": "25 Years to 70 Years"
      },
      "enrollment_count": 0,
      "start_date": "2025-01-16",
      "completion_date": "2025-08-31",
      "has_results": false,
      "last_update_posted_date": "2025-02-06",
      "last_synced_at": "2026-09-30T05:55:00.631Z",
      "location_count": 1,
      "location_summary": "Charlotte, North Carolina",
      "locations": [
        {
          "city": "Charlotte",
          "state": "North Carolina"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06721611"
    },
    {
      "nct_id": "NCT02792582",
      "title": "A Phase II Trial of Intensity-Modulated Proton Therapy for Incompletely Resected Craniopharyngioma and Observation for Craniopharyngioma After Radical Resection",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Craniopharyngioma"
      ],
      "interventions": [
        {
          "name": "Proton Therapy",
          "type": "RADIATION"
        },
        {
          "name": "Surgery",
          "type": "PROCEDURE"
        }
      ],
      "intervention_types": [
        "RADIATION",
        "PROCEDURE"
      ],
      "sponsor": "St. Jude Children's Research Hospital",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": "21 Years",
        "sex": "ALL",
        "summary": "Up to 21 Years"
      },
      "enrollment_count": 160,
      "start_date": "2016-06-22",
      "completion_date": "2028-12",
      "has_results": false,
      "last_update_posted_date": "2026-09-22",
      "last_synced_at": "2026-09-30T05:55:00.631Z",
      "location_count": 1,
      "location_summary": "Memphis, Tennessee",
      "locations": [
        {
          "city": "Memphis",
          "state": "Tennessee"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02792582"
    },
    {
      "nct_id": "NCT04179227",
      "title": "Focus Group in Collecting Feedbacks From Indoor Tanning Bed Users for Social Media-Delivered Intervention Development",
      "overall_status": "TERMINATED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Health Status Unknown"
      ],
      "interventions": [
        {
          "name": "Questionnaire Administration",
          "type": "OTHER"
        },
        {
          "name": "Survey Administration",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Rutgers, The State University of New Jersey",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "25 Years",
        "sex": "FEMALE",
        "summary": "18 Years to 25 Years · Female only"
      },
      "enrollment_count": 20,
      "start_date": "2017-03-13",
      "completion_date": "2020-09-06",
      "has_results": false,
      "last_update_posted_date": "2021-04-08",
      "last_synced_at": "2026-09-30T05:55:00.631Z",
      "location_count": 1,
      "location_summary": "New Brunswick, New Jersey",
      "locations": [
        {
          "city": "New Brunswick",
          "state": "New Jersey"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04179227"
    },
    {
      "nct_id": "NCT04851301",
      "title": "Neural Mechanisms of Immersive Virtual Reality in Chronic Pain",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1",
        "PHASE2"
      ],
      "conditions": [
        "Pain",
        "Virtual Reality",
        "Placebo",
        "Temporomandibular Disorder"
      ],
      "interventions": [
        {
          "name": "Active Virtual Reality",
          "type": "BEHAVIORAL"
        },
        {
          "name": "sham Virtual Reality",
          "type": "BEHAVIORAL"
        },
        {
          "name": "No Intervention",
          "type": "OTHER"
        },
        {
          "name": "Naloxone",
          "type": "DRUG"
        },
        {
          "name": "Saline",
          "type": "OTHER"
        },
        {
          "name": "Natural history",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL",
        "OTHER",
        "DRUG"
      ],
      "sponsor": "University of Maryland, Baltimore",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "88 Years",
        "sex": "ALL",
        "summary": "18 Years to 88 Years"
      },
      "enrollment_count": 259,
      "start_date": "2021-11-01",
      "completion_date": "2026-11-30",
      "has_results": false,
      "last_update_posted_date": "2026-02-27",
      "last_synced_at": "2026-09-30T05:55:00.631Z",
      "location_count": 1,
      "location_summary": "Baltimore, Maryland",
      "locations": [
        {
          "city": "Baltimore",
          "state": "Maryland"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04851301"
    },
    {
      "nct_id": "NCT03099850",
      "title": "Prospective Evaluation of Chronic Pancreatitis for Epidemiologic and Translational Studies",
      "overall_status": "RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Pancreatitis"
      ],
      "interventions": [
        {
          "name": "Data Management and Monitoring",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "M.D. Anderson Cancer Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "75 Years",
        "sex": "ALL",
        "summary": "18 Years to 75 Years"
      },
      "enrollment_count": 2345,
      "start_date": "2017-02-28",
      "completion_date": "2030-06-30",
      "has_results": false,
      "last_update_posted_date": "2025-10-14",
      "last_synced_at": "2026-09-30T05:55:00.631Z",
      "location_count": 1,
      "location_summary": "Houston, Texas",
      "locations": [
        {
          "city": "Houston",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03099850"
    }
  ]
}