{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Challenge&page=14",
    "query": {
      "intervention": "Challenge",
      "page": 14
    },
    "page_size": 10
  },
  "pagination": {
    "page": 14,
    "page_size": 10,
    "total_count": 1538,
    "total_pages": 154,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Challenge&page=15&page_size=10",
    "previous_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Challenge&page=13&page_size=10"
  },
  "source": "remote",
  "last_synced_at": "2026-10-23T07:40:23.162Z",
  "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": "NCT04630431",
      "title": "Understanding Challenges, Behavioral Patterns, and Preferences Toward Participation in Clinical Trials in Minority Patient Populations: Development of a Personalized Clinical Trial Educational Platform to Increase Participation in Clinical Trials Among Underserved Cancer Patients",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Hematopoietic and Lymphoid Cell Neoplasm",
        "Malignant Solid Neoplasm"
      ],
      "interventions": [
        {
          "name": "Best Practice",
          "type": "OTHER"
        },
        {
          "name": "Educational Intervention",
          "type": "OTHER"
        },
        {
          "name": "Electronic Health Record Review",
          "type": "OTHER"
        },
        {
          "name": "Patient Navigation",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Questionnaire Administration",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER",
        "BEHAVIORAL"
      ],
      "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": 590,
      "start_date": "2019-10-15",
      "completion_date": "2022-04-12",
      "has_results": false,
      "last_update_posted_date": "2026-06-04",
      "last_synced_at": "2026-10-23T07:40:23.162Z",
      "location_count": 3,
      "location_summary": "Scottsdale, Arizona • Jacksonville, Florida • Rochester, Minnesota",
      "locations": [
        {
          "city": "Scottsdale",
          "state": "Arizona"
        },
        {
          "city": "Jacksonville",
          "state": "Florida"
        },
        {
          "city": "Rochester",
          "state": "Minnesota"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04630431"
    },
    {
      "nct_id": "NCT01563107",
      "title": "Dietary Sodium's Effect on Urinary Sodium and Dopamine Excretion in Patients With Postural Tachycardia Syndrome",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Postural Orthostatic Tachycardia Syndrome"
      ],
      "interventions": [
        {
          "name": "Plasma Volume",
          "type": "RADIATION"
        },
        {
          "name": "Exercise Capacity Test - Bicycle",
          "type": "PROCEDURE"
        },
        {
          "name": "Posture Study",
          "type": "PROCEDURE"
        }
      ],
      "intervention_types": [
        "RADIATION",
        "PROCEDURE"
      ],
      "sponsor": "Vanderbilt University Medical Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "50 Years",
        "sex": "FEMALE",
        "summary": "18 Years to 50 Years · Female only"
      },
      "enrollment_count": 38,
      "start_date": "2012-03",
      "completion_date": "2020-12",
      "has_results": true,
      "last_update_posted_date": "2022-01-25",
      "last_synced_at": "2026-10-23T07:40:23.162Z",
      "location_count": 1,
      "location_summary": "Nashville, Tennessee",
      "locations": [
        {
          "city": "Nashville",
          "state": "Tennessee"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01563107"
    },
    {
      "nct_id": "NCT04594837",
      "title": "Ankle Robotics After Stroke",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Foot Drop",
        "Stroke",
        "Hemiparesis"
      ],
      "interventions": [
        {
          "name": "PTR Physical Therapy while wearing Robot group (Phase II)",
          "type": "DEVICE"
        },
        {
          "name": "Physical Therapy Only (Phase II)",
          "type": "OTHER"
        },
        {
          "name": "Cross over group for Physical Therapy n Sub-Acute group. (Phase II)",
          "type": "DEVICE"
        },
        {
          "name": "Chronic Stroke Subjects to receive robotic gait training therapy.",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE",
        "OTHER"
      ],
      "sponsor": "NextStep Robotics Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 140,
      "start_date": "2020-08-20",
      "completion_date": "2025-02-28",
      "has_results": false,
      "last_update_posted_date": "2023-01-26",
      "last_synced_at": "2026-10-23T07:40:23.162Z",
      "location_count": 1,
      "location_summary": "Baltimore, Maryland",
      "locations": [
        {
          "city": "Baltimore",
          "state": "Maryland"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04594837"
    },
    {
      "nct_id": "NCT02213029",
      "title": "A Study to Evaluate Pharmacokinetics, Pharmacodynamics and Tissue Concentrations of Epelsiban",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Embryo Transfer"
      ],
      "interventions": [
        {
          "name": "Epelsiban",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        },
        {
          "name": "Oxytocin",
          "type": "DRUG"
        },
        {
          "name": "Ortho-Cylcen (21)® tablet",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "GlaxoSmithKline",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "35 Years",
        "sex": "FEMALE",
        "summary": "18 Years to 35 Years · Female only"
      },
      "enrollment_count": 33,
      "start_date": "2014-08-28",
      "completion_date": "2016-02-07",
      "has_results": false,
      "last_update_posted_date": "2017-05-08",
      "last_synced_at": "2026-10-23T07:40:23.162Z",
      "location_count": 2,
      "location_summary": "Glendale, California • Baltimore, Maryland",
      "locations": [
        {
          "city": "Glendale",
          "state": "California"
        },
        {
          "city": "Baltimore",
          "state": "Maryland"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02213029"
    },
    {
      "nct_id": "NCT00603772",
      "title": "Clinical Evaluation of the Photoallergy Potential of Atralin Gel",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Healthy"
      ],
      "interventions": [
        {
          "name": "Atralin (tretinoin) gel, 0.05%",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Coria Laboratories, Ltd.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 40,
      "start_date": "2008-01",
      "completion_date": "2008-03",
      "has_results": false,
      "last_update_posted_date": "2008-05-06",
      "last_synced_at": "2026-10-23T07:40:23.162Z",
      "location_count": 1,
      "location_summary": "Winston-Salem, North Carolina",
      "locations": [
        {
          "city": "Winston-Salem",
          "state": "North Carolina"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00603772"
    },
    {
      "nct_id": "NCT03377049",
      "title": "Acetazolamide Challenge With Perfusion in the Prediction of Cerebral Vasospasm",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Subarachnoid Hemorrhage, Aneurysmal",
        "Vasospasm, Cerebral"
      ],
      "interventions": [
        {
          "name": "Acetazolamide",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "University of Wisconsin, Madison",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 11,
      "start_date": "2019-07-28",
      "completion_date": "2022-07-15",
      "has_results": true,
      "last_update_posted_date": "2023-07-27",
      "last_synced_at": "2026-10-23T07:40:23.162Z",
      "location_count": 1,
      "location_summary": "Madison, Wisconsin",
      "locations": [
        {
          "city": "Madison",
          "state": "Wisconsin"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03377049"
    },
    {
      "nct_id": "NCT04619017",
      "title": "Airway Immune Response to Allergens (Use Lay Language Here)",
      "overall_status": "UNKNOWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Allergic Asthma",
        "Allergy to Cats",
        "Allergy to Dust Mites",
        "Allergic Rhinitis",
        "Allergic Conjunctivitis"
      ],
      "interventions": [
        {
          "name": "Segmental allergen challenge",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "JOSALYN CHO",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "50 Years",
        "sex": "ALL",
        "summary": "18 Years to 50 Years"
      },
      "enrollment_count": 12,
      "start_date": "2021-10-28",
      "completion_date": "2024-03-01",
      "has_results": false,
      "last_update_posted_date": "2023-08-31",
      "last_synced_at": "2026-10-23T07:40:23.162Z",
      "location_count": 2,
      "location_summary": "Iowa City, Iowa • Boston, Massachusetts",
      "locations": [
        {
          "city": "Iowa City",
          "state": "Iowa"
        },
        {
          "city": "Boston",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04619017"
    },
    {
      "nct_id": "NCT04209985",
      "title": "Reaching for Equity in Sleep Apnea Treatment (REST) Study",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Sleep Apnea"
      ],
      "interventions": [
        {
          "name": "Health coaching",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "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": 27,
      "start_date": "2020-11-18",
      "completion_date": "2024-12-19",
      "has_results": false,
      "last_update_posted_date": "2026-04-28",
      "last_synced_at": "2026-10-23T07:40:23.162Z",
      "location_count": 1,
      "location_summary": "San Francisco, California",
      "locations": [
        {
          "city": "San Francisco",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04209985"
    },
    {
      "nct_id": "NCT07699692",
      "title": "A Sensory-Profile Framework for Differentiated Swim Instruction in Autistic Children",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "ASD"
      ],
      "interventions": [
        {
          "name": "sensory-based instruction",
          "type": "BEHAVIORAL"
        },
        {
          "name": "standard instruction",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "Genesis Indep Research",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "3 Months",
        "maximum_age": "16 Months",
        "sex": "ALL",
        "summary": "3 Months to 16 Months"
      },
      "enrollment_count": 95,
      "start_date": "2025-10-15",
      "completion_date": "2026-05-25",
      "has_results": false,
      "last_update_posted_date": "2026-07-13",
      "last_synced_at": "2026-10-23T07:40:23.162Z",
      "location_count": 1,
      "location_summary": "Louisville, Kentucky",
      "locations": [
        {
          "city": "Louisville",
          "state": "Kentucky"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07699692"
    },
    {
      "nct_id": "NCT04773184",
      "title": "Improving Diagnostic Standards in Dysphagia",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Dysphagia"
      ],
      "interventions": [
        {
          "name": "Fiberoptic Endoscopic Evaluation of Swallowing",
          "type": "PROCEDURE"
        },
        {
          "name": "Videofluoroscopic Swallowing Study",
          "type": "PROCEDURE"
        },
        {
          "name": "Voluntary Peak Cough Flow Testing",
          "type": "PROCEDURE"
        },
        {
          "name": "Iowa Oral Performance Instrument",
          "type": "PROCEDURE"
        },
        {
          "name": "Capsaicin Challenge",
          "type": "PROCEDURE"
        },
        {
          "name": "Pulmonary Function Testing",
          "type": "PROCEDURE"
        },
        {
          "name": "Voicing Tasks",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "PROCEDURE",
        "OTHER"
      ],
      "sponsor": "University of Florida",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "90 Years",
        "sex": "ALL",
        "summary": "18 Years to 90 Years"
      },
      "enrollment_count": 46,
      "start_date": "2021-04-27",
      "completion_date": "2023-09-23",
      "has_results": false,
      "last_update_posted_date": "2024-01-17",
      "last_synced_at": "2026-10-23T07:40:23.162Z",
      "location_count": 1,
      "location_summary": "Gainesville, Florida",
      "locations": [
        {
          "city": "Gainesville",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04773184"
    }
  ]
}