{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Control+group+-+observational&page=21",
    "query": {
      "intervention": "Control group - observational",
      "page": 21
    },
    "page_size": 10
  },
  "pagination": {
    "page": 21,
    "page_size": 10,
    "total_count": 537,
    "total_pages": 54,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Control+group+-+observational&page=22&page_size=10",
    "previous_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Control+group+-+observational&page=20&page_size=10"
  },
  "source": "remote",
  "last_synced_at": "2026-11-01T05:33:19.619Z",
  "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": "NCT04203381",
      "title": "Skeletal Health and Bone Marrow Composition Among Youth",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Gender Dysphoria in Children",
        "Puberty",
        "Bone Development"
      ],
      "interventions": [
        {
          "name": "GnRH Agonist",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "Amy DiVasta, MD",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "9 Years",
        "maximum_age": "14 Years",
        "sex": "ALL",
        "summary": "9 Years to 14 Years"
      },
      "enrollment_count": 78,
      "start_date": "2020-09-15",
      "completion_date": "2026-03-30",
      "has_results": false,
      "last_update_posted_date": "2026-04-03",
      "last_synced_at": "2026-11-01T05:33:19.619Z",
      "location_count": 2,
      "location_summary": "Boston, Massachusetts • Cincinnati, Ohio",
      "locations": [
        {
          "city": "Boston",
          "state": "Massachusetts"
        },
        {
          "city": "Cincinnati",
          "state": "Ohio"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04203381"
    },
    {
      "nct_id": "NCT01096043",
      "title": "A Dose-Defining Study of CXL-1020 in Patients With Systolic Heart Failure",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Heart Failure"
      ],
      "interventions": [
        {
          "name": "Placebo",
          "type": "DRUG"
        },
        {
          "name": "Strata 1 CXL-1020",
          "type": "DRUG"
        },
        {
          "name": "Strata 2 CXL-1020",
          "type": "DRUG"
        },
        {
          "name": "Strata 3 CXL-1020",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Bristol-Myers Squibb",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "85 Years",
        "sex": "ALL",
        "summary": "18 Years to 85 Years"
      },
      "enrollment_count": 69,
      "start_date": "2010-04",
      "completion_date": "2012-02",
      "has_results": false,
      "last_update_posted_date": "2016-11-15",
      "last_synced_at": "2026-11-01T05:33:19.619Z",
      "location_count": 15,
      "location_summary": "Gainesville, Florida • Jacksonville, Florida • Orlando, Florida + 11 more",
      "locations": [
        {
          "city": "Gainesville",
          "state": "Florida"
        },
        {
          "city": "Jacksonville",
          "state": "Florida"
        },
        {
          "city": "Orlando",
          "state": "Florida"
        },
        {
          "city": "New Orleans",
          "state": "Louisiana"
        },
        {
          "city": "Baltimore",
          "state": "Maryland"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01096043"
    },
    {
      "nct_id": "NCT07581080",
      "title": "Biofield Therapy for the Support of Immunotherapy-related Symptoms Among Adult Cancer Patients - A Pilot Study",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Cancer",
        "Immunotherapy",
        "Fatigue Related to Cancer Treatment",
        "Pain",
        "Stress"
      ],
      "interventions": [
        {
          "name": "Usui Reiki Intervention",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "University of California, Irvine",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 12,
      "start_date": "2026-04-20",
      "completion_date": "2027-01",
      "has_results": false,
      "last_update_posted_date": "2026-07-10",
      "last_synced_at": "2026-11-01T05:33:19.619Z",
      "location_count": 2,
      "location_summary": "Irvine, California • Orange, California",
      "locations": [
        {
          "city": "Irvine",
          "state": "California"
        },
        {
          "city": "Orange",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07581080"
    },
    {
      "nct_id": "NCT02036879",
      "title": "Gender Disparity and Hormones in Cystic Fibrosis",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "EARLY_PHASE1"
      ],
      "conditions": [
        "Cystic Fibrosis (CF)"
      ],
      "interventions": [
        {
          "name": "Loestrin (norethindrone acetate and ethinyl estradiol)",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "University of Texas Southwestern Medical Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 55,
      "start_date": "2014-02",
      "completion_date": "2018-08",
      "has_results": false,
      "last_update_posted_date": "2020-08-31",
      "last_synced_at": "2026-11-01T05:33:19.619Z",
      "location_count": 2,
      "location_summary": "Dallas, Texas",
      "locations": [
        {
          "city": "Dallas",
          "state": "Texas"
        },
        {
          "city": "Dallas",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02036879"
    },
    {
      "nct_id": "NCT00808808",
      "title": "Assessing Choice in the Employer Setting (ACES) Study",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Healthy"
      ],
      "interventions": [
        {
          "name": "Choice of TIV or FluMist with baseline advertisement",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Choice of TIV or FluMist with enhanced advertisement and incentives",
          "type": "OTHER"
        },
        {
          "name": "Control - Usual care offering TIV only with baseline advertisement",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL",
        "OTHER"
      ],
      "sponsor": "MedImmune LLC",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 4411,
      "start_date": "2008-09",
      "completion_date": "2008-12",
      "has_results": true,
      "last_update_posted_date": "2013-11-20",
      "last_synced_at": "2026-11-01T05:33:19.619Z",
      "location_count": 47,
      "location_summary": "Chatsworth, California • Novato, California • Sacramento, California + 34 more",
      "locations": [
        {
          "city": "Chatsworth",
          "state": "California"
        },
        {
          "city": "Novato",
          "state": "California"
        },
        {
          "city": "Sacramento",
          "state": "California"
        },
        {
          "city": "Sacramento",
          "state": "California"
        },
        {
          "city": "San Francisco",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00808808"
    },
    {
      "nct_id": "NCT03393390",
      "title": "Study of Cognition and Control in Youths",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Attention Deficit Hyperactivity Disorder",
        "Oppositional Defiant Disorder",
        "Conduct Disorder"
      ],
      "interventions": [
        {
          "name": "Clinical Assessment Visit",
          "type": "DIAGNOSTIC_TEST"
        },
        {
          "name": "fMRI scan",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "DIAGNOSTIC_TEST",
        "OTHER"
      ],
      "sponsor": "University of Michigan",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "6 Years",
        "maximum_age": "18 Years",
        "sex": "ALL",
        "summary": "6 Years to 18 Years"
      },
      "enrollment_count": 256,
      "start_date": "2016-03-17",
      "completion_date": "2019-09",
      "has_results": false,
      "last_update_posted_date": "2022-04-14",
      "last_synced_at": "2026-11-01T05:33:19.619Z",
      "location_count": 1,
      "location_summary": "Ann Arbor, Michigan",
      "locations": [
        {
          "city": "Ann Arbor",
          "state": "Michigan"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03393390"
    },
    {
      "nct_id": "NCT01916733",
      "title": "A Quality Initiative to Improve Glycemic Control in Diabetic and Non-Diabetic Insulin Study",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Glycemic Control",
        "Surgical Site Infections",
        "Cardiac Complications",
        "Length of Stay",
        "Cost"
      ],
      "interventions": [
        {
          "name": "standard insulin protocol post-op (continuous IV insulin)",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "University of Vermont Medical Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "99 Years",
        "sex": "ALL",
        "summary": "18 Years to 99 Years"
      },
      "enrollment_count": 89,
      "start_date": "2013-01",
      "completion_date": "2016-06",
      "has_results": false,
      "last_update_posted_date": "2016-10-25",
      "last_synced_at": "2026-11-01T05:33:19.619Z",
      "location_count": 1,
      "location_summary": "Burlington, Vermont",
      "locations": [
        {
          "city": "Burlington",
          "state": "Vermont"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01916733"
    },
    {
      "nct_id": "NCT07227441",
      "title": "Chronic Infections and Inflammation in ME/CFS: An Observational Study",
      "overall_status": "RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Myalgic Encephalomyelitis/Chronic Fatigue Syndrome"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "University of California, San Francisco",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 200,
      "start_date": "2026-01-01",
      "completion_date": "2030-09",
      "has_results": false,
      "last_update_posted_date": "2026-03-06",
      "last_synced_at": "2026-11-01T05:33:19.619Z",
      "location_count": 1,
      "location_summary": "San Francisco, California",
      "locations": [
        {
          "city": "San Francisco",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07227441"
    },
    {
      "nct_id": "NCT03832790",
      "title": "Sleep, Glycemic Control, and Insulin Resistance in Adolescents With Type 1 Diabetes",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Type1diabetes",
        "Adolescent Behavior",
        "Sleep"
      ],
      "interventions": [
        {
          "name": "observation",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "University of Colorado, Denver",
      "sponsor_class": "OTHER",
      "healthy_volunteers": null,
      "eligibility": {
        "minimum_age": "14 Years",
        "maximum_age": "19 Years",
        "sex": "ALL",
        "summary": "14 Years to 19 Years"
      },
      "enrollment_count": 23,
      "start_date": "2019-12-04",
      "completion_date": "2023-06-30",
      "has_results": false,
      "last_update_posted_date": "2024-10-01",
      "last_synced_at": "2026-11-01T05:33:19.619Z",
      "location_count": 1,
      "location_summary": "Aurora, Colorado",
      "locations": [
        {
          "city": "Aurora",
          "state": "Colorado"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03832790"
    },
    {
      "nct_id": "NCT06351579",
      "title": "Data Collection Post Radical Prostatectomy",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Stress Urinary Incontinence",
        "Radical Prostatectomy",
        "BPH"
      ],
      "interventions": [
        {
          "name": "Control",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Levee Medical, Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "45 Years",
        "maximum_age": "70 Years",
        "sex": "MALE",
        "summary": "45 Years to 70 Years · Male only"
      },
      "enrollment_count": 30,
      "start_date": "2023-03-30",
      "completion_date": "2025-07-30",
      "has_results": false,
      "last_update_posted_date": "2025-09-29",
      "last_synced_at": "2026-11-01T05:33:19.619Z",
      "location_count": 1,
      "location_summary": "Durham, North Carolina",
      "locations": [
        {
          "city": "Durham",
          "state": "North Carolina"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06351579"
    }
  ]
}