{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Control+group+-+observational&page=12",
    "query": {
      "intervention": "Control group - observational",
      "page": 12
    },
    "page_size": 10
  },
  "pagination": {
    "page": 12,
    "page_size": 10,
    "total_count": 537,
    "total_pages": 54,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Control+group+-+observational&page=13&page_size=10",
    "previous_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Control+group+-+observational&page=11&page_size=10"
  },
  "source": "remote",
  "last_synced_at": "2026-10-29T15:20:04.536Z",
  "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": "NCT06136091",
      "title": "Protocol CAUSE-03 / CHEETAH",
      "overall_status": "RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Asthma"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "National Institute of Allergy and Infectious Diseases (NIAID)",
      "sponsor_class": "NIH",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "6 Years",
        "maximum_age": "17 Years",
        "sex": "ALL",
        "summary": "6 Years to 17 Years"
      },
      "enrollment_count": 310,
      "start_date": "2024-05-08",
      "completion_date": "2027-09-01",
      "has_results": false,
      "last_update_posted_date": "2026-07-01",
      "last_synced_at": "2026-10-29T15:20:04.536Z",
      "location_count": 8,
      "location_summary": "Aurora, Colorado • Washington D.C., District of Columbia • Chicago, Illinois + 3 more",
      "locations": [
        {
          "city": "Aurora",
          "state": "Colorado"
        },
        {
          "city": "Washington D.C.",
          "state": "District of Columbia"
        },
        {
          "city": "Chicago",
          "state": "Illinois"
        },
        {
          "city": "Boston",
          "state": "Massachusetts"
        },
        {
          "city": "Boston",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06136091"
    },
    {
      "nct_id": "NCT04567550",
      "title": "RGX-314 Gene Therapy Administered in the Suprachoroidal Space for Participants With Diabetic Retinopathy (DR) With and Without Center Involved-Diabetic Macular Edema (CI-DME)",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Diabetic Retinopathy (DR)",
        "Center-Involved Diabetic Macular Edema (CI-DME)"
      ],
      "interventions": [
        {
          "name": "ABBV-RGX-314 Dose 1",
          "type": "GENETIC"
        },
        {
          "name": "ABBV-RGX-314 Dose 2",
          "type": "GENETIC"
        },
        {
          "name": "ABBV-RGX-314 Dose 3",
          "type": "GENETIC"
        },
        {
          "name": "Topical Steroid",
          "type": "DRUG"
        },
        {
          "name": "ABBV-RGX-314 Dose 4",
          "type": "GENETIC"
        },
        {
          "name": "Aflibercept",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "GENETIC",
        "DRUG",
        "BIOLOGICAL"
      ],
      "sponsor": "AbbVie",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "25 Years",
        "maximum_age": "89 Years",
        "sex": "ALL",
        "summary": "25 Years to 89 Years"
      },
      "enrollment_count": 139,
      "start_date": "2020-11-20",
      "completion_date": "2026-12",
      "has_results": false,
      "last_update_posted_date": "2026-08-19",
      "last_synced_at": "2026-10-29T15:20:04.536Z",
      "location_count": 25,
      "location_summary": "Phoenix, Arizona • Bakersfield, California • Beverly Hills, California + 21 more",
      "locations": [
        {
          "city": "Phoenix",
          "state": "Arizona"
        },
        {
          "city": "Phoenix",
          "state": "Arizona"
        },
        {
          "city": "Bakersfield",
          "state": "California"
        },
        {
          "city": "Beverly Hills",
          "state": "California"
        },
        {
          "city": "Campbell",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04567550"
    },
    {
      "nct_id": "NCT04990726",
      "title": "Immune Related Toxicity and Symptom Burden in Chronic Cancer Survivors With Melanoma Receiving Adjuvant Immunotherapy With Immune Checkpoint Inhibitors",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Clinical Stage III Cutaneous Melanoma AJCC v8",
        "Pathologic Stage III Cutaneous Melanoma AJCC v8",
        "Pathologic Stage IIIA Cutaneous Melanoma AJCC v8",
        "Pathologic Stage IIIB Cutaneous Melanoma AJCC v8",
        "Pathologic Stage IIIC Cutaneous Melanoma AJCC v8",
        "Pathologic Stage IIID Cutaneous Melanoma AJCC v8",
        "Melanoma, Stage II",
        "Melanoma Stage IV"
      ],
      "interventions": [
        {
          "name": "Assessment",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Biospecimen Collection",
          "type": "PROCEDURE"
        },
        {
          "name": "Quality-of-Life Assessment",
          "type": "OTHER"
        },
        {
          "name": "Questionnaire Administration",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL",
        "PROCEDURE",
        "OTHER"
      ],
      "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": 126,
      "start_date": "2019-12-05",
      "completion_date": "2027-02-02",
      "has_results": false,
      "last_update_posted_date": "2026-09-18",
      "last_synced_at": "2026-10-29T15:20:04.536Z",
      "location_count": 1,
      "location_summary": "Houston, Texas",
      "locations": [
        {
          "city": "Houston",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04990726"
    },
    {
      "nct_id": "NCT00002668",
      "title": "Pain Control in Patients With Recurrent or Metastatic Breast or Prostate Cancer",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Breast Cancer",
        "Pain",
        "Prostate Cancer"
      ],
      "interventions": [
        {
          "name": "Observation",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Educational Intervention and Behavioral Skills Training",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "Eastern Cooperative Oncology Group",
      "sponsor_class": "NETWORK",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "120 Years",
        "sex": "ALL",
        "summary": "18 Years to 120 Years"
      },
      "enrollment_count": 13,
      "start_date": "1996-02-14",
      "completion_date": "1998-09",
      "has_results": false,
      "last_update_posted_date": "2023-06-22",
      "last_synced_at": "2026-10-29T15:20:04.536Z",
      "location_count": 15,
      "location_summary": "Urbana, Illinois • Cedar Rapids, Iowa • Des Moines, Iowa + 9 more",
      "locations": [
        {
          "city": "Urbana",
          "state": "Illinois"
        },
        {
          "city": "Cedar Rapids",
          "state": "Iowa"
        },
        {
          "city": "Des Moines",
          "state": "Iowa"
        },
        {
          "city": "Des Moines",
          "state": "Iowa"
        },
        {
          "city": "Des Moines",
          "state": "Iowa"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00002668"
    },
    {
      "nct_id": "NCT06704282",
      "title": "Assessing the Impact of VR-Based Observational Mindfulness Meditation on Stress Reduction in Adults",
      "overall_status": "NOT_YET_RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Stress",
        "Anxiety",
        "Depression"
      ],
      "interventions": [
        {
          "name": "VR Mindfulness Meditation Program",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "Penn State University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 34,
      "start_date": "2024-11-25",
      "completion_date": "2025-02-23",
      "has_results": false,
      "last_update_posted_date": "2024-11-26",
      "last_synced_at": "2026-10-29T15:20:04.536Z",
      "location_count": 1,
      "location_summary": "Erie, Pennsylvania",
      "locations": [
        {
          "city": "Erie",
          "state": "Pennsylvania"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06704282"
    },
    {
      "nct_id": "NCT02168959",
      "title": "Continuous Femoral Nerve Block With a Tibial Plateau Fracture",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "EARLY_PHASE1"
      ],
      "conditions": [
        "Tibial Plateau Fracture"
      ],
      "interventions": [
        {
          "name": "bupivacaine",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "University of Utah",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 5,
      "start_date": "2013-02",
      "completion_date": "2014-12",
      "has_results": false,
      "last_update_posted_date": "2016-03-14",
      "last_synced_at": "2026-10-29T15:20:04.536Z",
      "location_count": 1,
      "location_summary": "Salt Lake City, Utah",
      "locations": [
        {
          "city": "Salt Lake City",
          "state": "Utah"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02168959"
    },
    {
      "nct_id": "NCT02919280",
      "title": "Dallas 2K: A Natural History Study of Depression",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Depression",
        "Depression, Bipolar"
      ],
      "interventions": [
        {
          "name": "Observational Study",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "University of Texas Southwestern Medical Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "10 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "10 Years and older"
      },
      "enrollment_count": 2500,
      "start_date": "2016-06-14",
      "completion_date": "2036-09",
      "has_results": false,
      "last_update_posted_date": "2026-09-15",
      "last_synced_at": "2026-10-29T15:20:04.536Z",
      "location_count": 1,
      "location_summary": "Dallas, Texas",
      "locations": [
        {
          "city": "Dallas",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02919280"
    },
    {
      "nct_id": "NCT03738566",
      "title": "Outcomes of Esophageal Self Dilation for Benign Refractory Esophageal Stricture Management",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Esophageal Dilation",
        "Refractory Benign Esophageal Stricture"
      ],
      "interventions": [
        {
          "name": "Esophageal self-dilation therapy",
          "type": "DEVICE"
        },
        {
          "name": "Endoscopic therapy with esophageal dilation",
          "type": "PROCEDURE"
        }
      ],
      "intervention_types": [
        "DEVICE",
        "PROCEDURE"
      ],
      "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": 26,
      "start_date": "2018-11-21",
      "completion_date": "2022-05-15",
      "has_results": true,
      "last_update_posted_date": "2023-05-24",
      "last_synced_at": "2026-10-29T15:20:04.536Z",
      "location_count": 1,
      "location_summary": "Rochester, Minnesota",
      "locations": [
        {
          "city": "Rochester",
          "state": "Minnesota"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03738566"
    },
    {
      "nct_id": "NCT00923858",
      "title": "The Natural History of Asymptomatic Rotator Cuff Tears",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Rotator Cuff Tear"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "Washington University School of Medicine",
      "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": 495,
      "start_date": "2005-07-01",
      "completion_date": "2022-06",
      "has_results": false,
      "last_update_posted_date": "2022-08-31",
      "last_synced_at": "2026-10-29T15:20:04.536Z",
      "location_count": 1,
      "location_summary": "St Louis, Missouri",
      "locations": [
        {
          "city": "St Louis",
          "state": "Missouri"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00923858"
    },
    {
      "nct_id": "NCT06438315",
      "title": "SuperSaturated Oxygen Comprehensive Observational Registry",
      "overall_status": "RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "STEMI - ST Elevation Myocardial Infarction",
        "AMI"
      ],
      "interventions": [
        {
          "name": "KCCQ",
          "type": "OTHER"
        },
        {
          "name": "Eq5D",
          "type": "OTHER"
        },
        {
          "name": "cMRI (Subset of patients)",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "TherOx",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "80 Years",
        "sex": "ALL",
        "summary": "18 Years to 80 Years"
      },
      "enrollment_count": 1000,
      "start_date": "2024-08-13",
      "completion_date": "2029-03-31",
      "has_results": false,
      "last_update_posted_date": "2026-08-20",
      "last_synced_at": "2026-10-29T15:20:04.536Z",
      "location_count": 25,
      "location_summary": "Fountain Valley, California • La Jolla, California • Laguna Hills, California + 21 more",
      "locations": [
        {
          "city": "Fountain Valley",
          "state": "California"
        },
        {
          "city": "La Jolla",
          "state": "California"
        },
        {
          "city": "Laguna Hills",
          "state": "California"
        },
        {
          "city": "Long Beach",
          "state": "California"
        },
        {
          "city": "Los Angeles",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06438315"
    }
  ]
}