{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Challenge&page=21",
    "query": {
      "intervention": "Challenge",
      "page": 21
    },
    "page_size": 10
  },
  "pagination": {
    "page": 21,
    "page_size": 10,
    "total_count": 1539,
    "total_pages": 154,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Challenge&page=22&page_size=10",
    "previous_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Challenge&page=20&page_size=10"
  },
  "source": "remote",
  "last_synced_at": "2026-10-24T21:37:23.923Z",
  "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": "NCT04587336",
      "title": "Tailored Approaches to Reduce Distress and Improve Self-Management for Veterans With Diabetes",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Diabetes",
        "Diabetes Distress",
        "Self-Management",
        "Veteran"
      ],
      "interventions": [
        {
          "name": "Cognitive Interview",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Baseline Survey",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Qualitative Interviews",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "VA Office of Research and Development",
      "sponsor_class": "FED",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "80 Years",
        "sex": "ALL",
        "summary": "18 Years to 80 Years"
      },
      "enrollment_count": 225,
      "start_date": "2020-08-24",
      "completion_date": "2025-03-31",
      "has_results": true,
      "last_update_posted_date": "2025-05-02",
      "last_synced_at": "2026-10-24T21:37:23.923Z",
      "location_count": 1,
      "location_summary": "Durham, North Carolina",
      "locations": [
        {
          "city": "Durham",
          "state": "North Carolina"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04587336"
    },
    {
      "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": "2026-10-24T21:37:23.923Z",
      "location_count": 1,
      "location_summary": "Nashville, Tennessee",
      "locations": [
        {
          "city": "Nashville",
          "state": "Tennessee"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01563107"
    },
    {
      "nct_id": "NCT01102725",
      "title": "Assessing Infectious Risk and Visceral Closure in Natural Orifice Translumenal Endoscopic Surgery (NOTES)",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Colonic Diseases",
        "Rectal Diseases"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "University Hospitals Cleveland Medical Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 12,
      "start_date": "2010-04",
      "completion_date": "2011-06",
      "has_results": false,
      "last_update_posted_date": "2014-12-16",
      "last_synced_at": "2026-10-24T21:37:23.923Z",
      "location_count": 1,
      "location_summary": "Cleveland, Ohio",
      "locations": [
        {
          "city": "Cleveland",
          "state": "Ohio"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01102725"
    },
    {
      "nct_id": "NCT02639676",
      "title": "Anti-Angiogenic Preeclampsia Milieu Impairs Infant Lung and Vascular Development",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Preeclampsia"
      ],
      "interventions": [
        {
          "name": "Diffusion Lung Capacity (DLCO), Vascular Challenge, Video Imaging, Specimen Collections",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Indiana University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "26 Weeks",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "26 Weeks and older"
      },
      "enrollment_count": 292,
      "start_date": "2016-02-11",
      "completion_date": "2020-11-17",
      "has_results": false,
      "last_update_posted_date": "2022-02-24",
      "last_synced_at": "2026-10-24T21:37:23.923Z",
      "location_count": 1,
      "location_summary": "Indianapolis, Indiana",
      "locations": [
        {
          "city": "Indianapolis",
          "state": "Indiana"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02639676"
    },
    {
      "nct_id": "NCT05529758",
      "title": "Virtual Third-Wave Intervention for Internalized Weight Bias Combined With a Weight Loss Program",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Weight Loss",
        "Weight Prejudice"
      ],
      "interventions": [
        {
          "name": "Internalized Weight Bias Intervention",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "East Carolina University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 28,
      "start_date": "2022-08-15",
      "completion_date": "2023-08-15",
      "has_results": false,
      "last_update_posted_date": "2024-03-05",
      "last_synced_at": "2026-10-24T21:37:23.923Z",
      "location_count": 1,
      "location_summary": "Greenville, North Carolina",
      "locations": [
        {
          "city": "Greenville",
          "state": "North Carolina"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05529758"
    },
    {
      "nct_id": "NCT06915090",
      "title": "FIT-COACH: Fitbit Intervention With Coordinated Health Coaching and PCP Support",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "GLP - 1",
        "Diabetes",
        "Obesity and Obesity-related Medical Conditions",
        "Cardiovascular Diseases"
      ],
      "interventions": [
        {
          "name": "Health Coach/Fitbit",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "University of Massachusetts, Worcester",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "100 Years",
        "sex": "ALL",
        "summary": "18 Years to 100 Years"
      },
      "enrollment_count": 15,
      "start_date": "2025-03-18",
      "completion_date": "2025-09-30",
      "has_results": false,
      "last_update_posted_date": "2025-12-18",
      "last_synced_at": "2026-10-24T21:37:23.923Z",
      "location_count": 1,
      "location_summary": "Worcester, Massachusetts",
      "locations": [
        {
          "city": "Worcester",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06915090"
    },
    {
      "nct_id": "NCT01060748",
      "title": "Safety and Efficacy Study of a Vaccine Against Enterotoxigenic Escherichia Coli (ETEC) to Prevent Moderate to Severe Diarrhea",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Diarrhea"
      ],
      "interventions": [
        {
          "name": "ACE527",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Placebo",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "TD Vaccines A/S",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "50 Years",
        "sex": "ALL",
        "summary": "18 Years to 50 Years"
      },
      "enrollment_count": 70,
      "start_date": "2010-03",
      "completion_date": "2010-10",
      "has_results": false,
      "last_update_posted_date": "2011-03-07",
      "last_synced_at": "2026-10-24T21:37:23.923Z",
      "location_count": 1,
      "location_summary": "Baltimore, Maryland",
      "locations": [
        {
          "city": "Baltimore",
          "state": "Maryland"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01060748"
    },
    {
      "nct_id": "NCT05190926",
      "title": "Smart Technology for Anorexia Nervosa Recovery",
      "overall_status": "UNKNOWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Anorexia Nervosa"
      ],
      "interventions": [
        {
          "name": "Smart-Treatment for Anorexia Nervosa Recovery (STAR)",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Present-focused Anorexia Nervosa Coping Treatment (PACT)",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "University of Kansas",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "13 Years",
        "maximum_age": "21 Years",
        "sex": "ALL",
        "summary": "13 Years to 21 Years"
      },
      "enrollment_count": 90,
      "start_date": "2023-05-08",
      "completion_date": "2024-06-30",
      "has_results": false,
      "last_update_posted_date": "2023-07-11",
      "last_synced_at": "2026-10-24T21:37:23.923Z",
      "location_count": 1,
      "location_summary": "Lawrence, Kansas",
      "locations": [
        {
          "city": "Lawrence",
          "state": "Kansas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05190926"
    },
    {
      "nct_id": "NCT02106078",
      "title": "Internet-Based Interventions for Bipolar Disorder",
      "overall_status": "UNKNOWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Bipolar Disorder"
      ],
      "interventions": [
        {
          "name": "Moderated Discussion Board",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Psychoeducation",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Interactive Psychosocial Tools",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "VA Palo Alto Health Care System",
      "sponsor_class": "FED",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "21 Years",
        "maximum_age": "65 Years",
        "sex": "ALL",
        "summary": "21 Years to 65 Years"
      },
      "enrollment_count": 300,
      "start_date": "2014-01",
      "completion_date": "2016-06",
      "has_results": false,
      "last_update_posted_date": "2015-09-10",
      "last_synced_at": "2026-10-24T21:37:23.923Z",
      "location_count": 1,
      "location_summary": "Palo Alto, California",
      "locations": [
        {
          "city": "Palo Alto",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02106078"
    },
    {
      "nct_id": "NCT06886776",
      "title": "Implementing A Secure Firearm Storage Program in Illinois Health Centers in Partnership With AllianceChicago and the Illinois Primary Health Care Association (COMMUNITY ASPIRE)",
      "overall_status": "ENROLLING_BY_INVITATION",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Suicide"
      ],
      "interventions": [
        {
          "name": "Implementation package (training and facilitation)",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "Northwestern University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": null,
        "sex": "ALL",
        "summary": "Not listed"
      },
      "enrollment_count": 1086,
      "start_date": "2026-07-14",
      "completion_date": "2029-01-13",
      "has_results": false,
      "last_update_posted_date": "2026-07-20",
      "last_synced_at": "2026-10-24T21:37:23.923Z",
      "location_count": 1,
      "location_summary": "Chicago, Illinois",
      "locations": [
        {
          "city": "Chicago",
          "state": "Illinois"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06886776"
    }
  ]
}