{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Control+group+-+observational&page=15",
    "query": {
      "intervention": "Control group - observational",
      "page": 15
    },
    "page_size": 10
  },
  "pagination": {
    "page": 15,
    "page_size": 10,
    "total_count": 537,
    "total_pages": 54,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Control+group+-+observational&page=16&page_size=10",
    "previous_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Control+group+-+observational&page=14&page_size=10"
  },
  "source": "remote",
  "last_synced_at": "2026-10-30T16:27:43.863Z",
  "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": "NCT03059563",
      "title": "Dopamine D2/D3 Receptor Upregulation by Varenicline in Methamphetamine Users",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Dopamine D2/3 Receptor Availability",
        "Cognitive Function",
        "Methamphetamine Abuse"
      ],
      "interventions": [
        {
          "name": "Varenicline",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "DRUG",
        "OTHER"
      ],
      "sponsor": "University of California, Los Angeles",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "60 Years",
        "sex": "ALL",
        "summary": "18 Years to 60 Years"
      },
      "enrollment_count": 62,
      "start_date": "2018-01-11",
      "completion_date": "2023-09-28",
      "has_results": false,
      "last_update_posted_date": "2024-05-08",
      "last_synced_at": "2026-10-30T16:27:43.863Z",
      "location_count": 1,
      "location_summary": "Los Angeles, California",
      "locations": [
        {
          "city": "Los Angeles",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03059563"
    },
    {
      "nct_id": "NCT04289571",
      "title": "Virtual Reality Mobility Assessment of Functional Vision in Retinal Disease",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Cone-Rod Degeneration",
        "Rod-Cone Degeneration"
      ],
      "interventions": [
        {
          "name": "VR Mobility Tool",
          "type": "DIAGNOSTIC_TEST"
        }
      ],
      "intervention_types": [
        "DIAGNOSTIC_TEST"
      ],
      "sponsor": "National Eye Institute (NEI)",
      "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": 165,
      "start_date": "2023-07-25",
      "completion_date": "2030-12-31",
      "has_results": false,
      "last_update_posted_date": "2026-08-10",
      "last_synced_at": "2026-10-30T16:27:43.863Z",
      "location_count": 1,
      "location_summary": "Bethesda, Maryland",
      "locations": [
        {
          "city": "Bethesda",
          "state": "Maryland"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04289571"
    },
    {
      "nct_id": "NCT03382483",
      "title": "Observational, Non-interventional Use of LIPUS to Mitigate Fracture Non-union in Patients at Risk",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Mitigation of Fracture Non-union in Patients at Risk"
      ],
      "interventions": [
        {
          "name": "Low intensity pulsed ultrasound",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "Bioventus LLC",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "21 Years",
        "maximum_age": "80 Years",
        "sex": "ALL",
        "summary": "21 Years to 80 Years"
      },
      "enrollment_count": 12387,
      "start_date": "2017-10-16",
      "completion_date": "2022-05-01",
      "has_results": false,
      "last_update_posted_date": "2025-10-28",
      "last_synced_at": "2026-10-30T16:27:43.863Z",
      "location_count": 1,
      "location_summary": "Jericho, New York",
      "locations": [
        {
          "city": "Jericho",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03382483"
    },
    {
      "nct_id": "NCT02854657",
      "title": "Teaching Skin Self -Examination to Melanoma Patients and Their Skin Check Partners",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Melanoma"
      ],
      "interventions": [
        {
          "name": "Skin Self- examination structured training",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "Northwestern University",
      "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": 682,
      "start_date": "2016-05",
      "completion_date": "2021-03-09",
      "has_results": false,
      "last_update_posted_date": "2021-03-11",
      "last_synced_at": "2026-10-30T16:27:43.863Z",
      "location_count": 1,
      "location_summary": "Chicago, Illinois",
      "locations": [
        {
          "city": "Chicago",
          "state": "Illinois"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02854657"
    },
    {
      "nct_id": "NCT07544602",
      "title": "Music Therapy for Comatose Brain Injured Patients",
      "overall_status": "ENROLLING_BY_INVITATION",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Traumatic Brain Injury"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "Mercy Health Ohio",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 35,
      "start_date": "2026-05-19",
      "completion_date": "2028-04-07",
      "has_results": false,
      "last_update_posted_date": "2026-10-09",
      "last_synced_at": "2026-10-30T16:27:43.863Z",
      "location_count": 2,
      "location_summary": "Youngstown, Ohio",
      "locations": [
        {
          "city": "Youngstown",
          "state": "Ohio"
        },
        {
          "city": "Youngstown",
          "state": "Ohio"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07544602"
    },
    {
      "nct_id": "NCT03133559",
      "title": "Mapping the Human HIV Chronobiome",
      "overall_status": "SUSPENDED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Hiv",
        "Healthy"
      ],
      "interventions": [
        {
          "name": "Observational",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "University of Pennsylvania",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "25 Years",
        "maximum_age": "50 Years",
        "sex": "ALL",
        "summary": "25 Years to 50 Years"
      },
      "enrollment_count": 80,
      "start_date": "2017-04-19",
      "completion_date": "2029-08",
      "has_results": false,
      "last_update_posted_date": "2026-02-24",
      "last_synced_at": "2026-10-30T16:27:43.863Z",
      "location_count": 1,
      "location_summary": "Philadelphia, Pennsylvania",
      "locations": [
        {
          "city": "Philadelphia",
          "state": "Pennsylvania"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03133559"
    },
    {
      "nct_id": "NCT04697446",
      "title": "External Control, Observational, Retrospective Study Comparing Pralsetinib to Best Available Therapy in Patients With RET-Fusion Positive NSCLC",
      "overall_status": "UNKNOWN",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "RET-fusion Non Small Cell Lung Cancer",
        "Lung Neoplasm",
        "Carcinoma, Non-Small-Cell Lung",
        "Respiratory Tract Neoplasms",
        "Thoracic Neoplasms",
        "Neoplasms by Site",
        "Neoplasms",
        "Lung Diseases",
        "Respiratory Tract Diseases",
        "Carcinoma, Bronchogenic",
        "Bronchial Diseases",
        "Head and Neck Neoplasms",
        "Carcinoma",
        "Neoplasms by Histologic Type",
        "Neoplasms, Germ Cell and Embryonal",
        "Neoplasms, Nerve Tissue",
        "Metastatic Non Small Cell Lung Cancer"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "Blueprint Medicines Corporation",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 279,
      "start_date": "2020-12-01",
      "completion_date": "2021-10-31",
      "has_results": false,
      "last_update_posted_date": "2021-08-10",
      "last_synced_at": "2026-10-30T16:27:43.863Z",
      "location_count": 1,
      "location_summary": "New York, New York",
      "locations": [
        {
          "city": "New York",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04697446"
    },
    {
      "nct_id": "NCT03008382",
      "title": "Interstitial Cystitis: Examination of the Central Autonomic Network",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Interstitial Cystitis/Painful Bladder Syndrome",
        "Myofascial Pelvic Pain"
      ],
      "interventions": [
        {
          "name": "Metoprolol Tartrate Oral Tablet",
          "type": "DRUG"
        },
        {
          "name": "Placebo Oral Tablet",
          "type": "DRUG"
        },
        {
          "name": "No intervention- observational sub-study",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "DRUG",
        "OTHER"
      ],
      "sponsor": "Virginia Commonwealth University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "80 Years",
        "sex": "FEMALE",
        "summary": "18 Years to 80 Years · Female only"
      },
      "enrollment_count": 72,
      "start_date": "2017-03-01",
      "completion_date": "2022-03-16",
      "has_results": true,
      "last_update_posted_date": "2025-02-17",
      "last_synced_at": "2026-10-30T16:27:43.863Z",
      "location_count": 2,
      "location_summary": "Evanston, Illinois • Richmond, Virginia",
      "locations": [
        {
          "city": "Evanston",
          "state": "Illinois"
        },
        {
          "city": "Richmond",
          "state": "Virginia"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03008382"
    },
    {
      "nct_id": "NCT07225920",
      "title": "Understanding Needs of Older Patients Prior to Starting Cancer Treatment",
      "overall_status": "ENROLLING_BY_INVITATION",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Hematopoietic and Lymphatic System Neoplasm",
        "Malignant Solid Neoplasm"
      ],
      "interventions": [
        {
          "name": "Survey Administration",
          "type": "OTHER"
        },
        {
          "name": "Interview",
          "type": "OTHER"
        },
        {
          "name": "Educational Intervention",
          "type": "OTHER"
        },
        {
          "name": "Assessment",
          "type": "OTHER"
        },
        {
          "name": "Internet-Based Intervention",
          "type": "OTHER"
        },
        {
          "name": "Electronic Health Record Review",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Wake Forest University Health Sciences",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 216,
      "start_date": "2026-01-14",
      "completion_date": "2027-12-31",
      "has_results": false,
      "last_update_posted_date": "2026-10-07",
      "last_synced_at": "2026-10-30T16:27:43.863Z",
      "location_count": 39,
      "location_summary": "Tuscaloosa, Alabama • Fort Smith, Arkansas • Jonesboro, Arkansas + 30 more",
      "locations": [
        {
          "city": "Tuscaloosa",
          "state": "Alabama"
        },
        {
          "city": "Fort Smith",
          "state": "Arkansas"
        },
        {
          "city": "Jonesboro",
          "state": "Arkansas"
        },
        {
          "city": "Newark",
          "state": "Delaware"
        },
        {
          "city": "Newark",
          "state": "Delaware"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07225920"
    },
    {
      "nct_id": "NCT05260996",
      "title": "Big Decisions - an Evaluation of a Comprehensive Sexual Health Curriculum Pilot in Ecuador During 2019",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Adolescent Sexual Behavior"
      ],
      "interventions": [
        {
          "name": "Pilot Group",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "The University of Texas Health Science Center, Houston",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "12 Years",
        "maximum_age": "17 Years",
        "sex": "ALL",
        "summary": "12 Years to 17 Years"
      },
      "enrollment_count": 66,
      "start_date": "2019-02-09",
      "completion_date": "2019-04-02",
      "has_results": false,
      "last_update_posted_date": "2022-03-02",
      "last_synced_at": "2026-10-30T16:27:43.863Z",
      "location_count": 1,
      "location_summary": "Houston, Texas",
      "locations": [
        {
          "city": "Houston",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05260996"
    }
  ]
}