{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Questionnaire&page=16",
    "query": {
      "intervention": "Questionnaire",
      "page": 16
    },
    "page_size": 10
  },
  "pagination": {
    "page": 16,
    "page_size": 10,
    "total_count": 5464,
    "total_pages": 547,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Questionnaire&page=17&page_size=10",
    "previous_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Questionnaire&page=15&page_size=10"
  },
  "source": "remote",
  "last_synced_at": "2026-10-17T22:48:48.144Z",
  "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": "NCT05453708",
      "title": "Maternal Risk Factors for Autism Spectrum Disorders: A Case-Control Approach",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Autism",
        "Autism Spectrum Disorder",
        "Autistic Disorder",
        "Pregnancy Related",
        "Diet, Healthy",
        "Diet; Deficiency",
        "Folate Deficiency",
        "Folic Acid Deficiency",
        "Folic Acid Overdose"
      ],
      "interventions": [
        {
          "name": "Survey",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Walden University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "FEMALE",
        "summary": "18 Years and older · Female only"
      },
      "enrollment_count": 239,
      "start_date": "2022-06-16",
      "completion_date": "2023-01-22",
      "has_results": false,
      "last_update_posted_date": "2023-03-20",
      "last_synced_at": "2026-10-17T22:48:48.144Z",
      "location_count": 1,
      "location_summary": "Minneapolis, Minnesota",
      "locations": [
        {
          "city": "Minneapolis",
          "state": "Minnesota"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05453708"
    },
    {
      "nct_id": "NCT02491632",
      "title": "Physical Activity and Dexamethasone in Reducing Cancer-Related Fatigue in Patients With Advanced Cancer",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2",
        "PHASE3"
      ],
      "conditions": [
        "Advanced Malignant Neoplasm",
        "Fatigue",
        "Metastatic Malignant Neoplasm",
        "Recurrent Malignant Neoplasm",
        "Refractory Malignant Neoplasm"
      ],
      "interventions": [
        {
          "name": "Dexamethasone",
          "type": "DRUG"
        },
        {
          "name": "Exercise Intervention",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Laboratory Biomarker Analysis",
          "type": "OTHER"
        },
        {
          "name": "Quality-of-Life Assessment",
          "type": "OTHER"
        },
        {
          "name": "Questionnaire Administration",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "DRUG",
        "BEHAVIORAL",
        "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": 90,
      "start_date": "2015-08-13",
      "completion_date": "2026-12-31",
      "has_results": true,
      "last_update_posted_date": "2026-09-22",
      "last_synced_at": "2026-10-17T22:48:48.144Z",
      "location_count": 1,
      "location_summary": "Houston, Texas",
      "locations": [
        {
          "city": "Houston",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02491632"
    },
    {
      "nct_id": "NCT04954885",
      "title": "Evaluating Modifiable Biomarkers for the Prediction of Immunotherapy Response and Toxicity",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Lung Non-Squamous Non-Small Cell Carcinoma",
        "Stage IIIB Lung Cancer AJCC v8",
        "Stage IV Lung Cancer AJCC v8",
        "Stage IVA Lung Cancer AJCC v8",
        "Stage IVB Lung Cancer AJCC v8"
      ],
      "interventions": [
        {
          "name": "Biospecimen Collection",
          "type": "PROCEDURE"
        },
        {
          "name": "Physical Performance Testing",
          "type": "OTHER"
        },
        {
          "name": "Questionnaire Administration",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "PROCEDURE",
        "OTHER"
      ],
      "sponsor": "Ohio State University Comprehensive 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": 2,
      "start_date": "2021-05-18",
      "completion_date": "2022-10-12",
      "has_results": false,
      "last_update_posted_date": "2025-01-27",
      "last_synced_at": "2026-10-17T22:48:48.144Z",
      "location_count": 1,
      "location_summary": "Columbus, Ohio",
      "locations": [
        {
          "city": "Columbus",
          "state": "Ohio"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04954885"
    },
    {
      "nct_id": "NCT04870515",
      "title": "Diet and Physical Activity Intervention for the Prevention of ADT-Induced Metabolic Changes in Patients With Prostate Cancer, TRIPLE-A PILOT Study",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Localized Prostate Carcinoma",
        "Prostate Adenocarcinoma"
      ],
      "interventions": [
        {
          "name": "Best Practice",
          "type": "OTHER"
        },
        {
          "name": "Dietary Intervention",
          "type": "OTHER"
        },
        {
          "name": "Exercise Intervention",
          "type": "OTHER"
        },
        {
          "name": "Quality-of-Life Assessment",
          "type": "OTHER"
        },
        {
          "name": "Questionnaire Administration",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Fred Hutchinson Cancer Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "40 Years",
        "maximum_age": null,
        "sex": "MALE",
        "summary": "40 Years and older · Male only"
      },
      "enrollment_count": 20,
      "start_date": "2021-11-04",
      "completion_date": "2024-12-18",
      "has_results": true,
      "last_update_posted_date": "2026-01-09",
      "last_synced_at": "2026-10-17T22:48:48.144Z",
      "location_count": 1,
      "location_summary": "Seattle, Washington",
      "locations": [
        {
          "city": "Seattle",
          "state": "Washington"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04870515"
    },
    {
      "nct_id": "NCT05509348",
      "title": "SMART Optimization of a Parenting Program for Active-duty Families",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Parenting"
      ],
      "interventions": [
        {
          "name": "Phase 1: ADAPT Workshop",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Phase 1: ADAPT Online",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Phase 2: ADAPT Group",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Phase 2: ADAPT Individual",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "University of Minnesota",
      "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": 423,
      "start_date": "2017-07-01",
      "completion_date": "2022-09-29",
      "has_results": false,
      "last_update_posted_date": "2022-12-01",
      "last_synced_at": "2026-10-17T22:48:48.144Z",
      "location_count": 4,
      "location_summary": "Fort Campbell North, Kentucky • Fort Bragg, North Carolina • Arlington, Virginia + 1 more",
      "locations": [
        {
          "city": "Fort Campbell North",
          "state": "Kentucky"
        },
        {
          "city": "Fort Bragg",
          "state": "North Carolina"
        },
        {
          "city": "Arlington",
          "state": "Virginia"
        },
        {
          "city": "Fort Belvoir",
          "state": "Virginia"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05509348"
    },
    {
      "nct_id": "NCT00723385",
      "title": "Effects of Vitamin D on Lipids",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Hypercholesterolemia",
        "Vitamin D Deficiency"
      ],
      "interventions": [
        {
          "name": "Vitamin D (1000 or 2000 IU/day)",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Placebo",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT",
        "OTHER"
      ],
      "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": 130,
      "start_date": "2008-07",
      "completion_date": "2012-07",
      "has_results": false,
      "last_update_posted_date": "2015-04-08",
      "last_synced_at": "2026-10-17T22:48:48.144Z",
      "location_count": 1,
      "location_summary": "San Francisco, California",
      "locations": [
        {
          "city": "San Francisco",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00723385"
    },
    {
      "nct_id": "NCT06223438",
      "title": "Detecting an MCI and Amyloid Digital Neuro Signature(DNS) Using Altoida's Multimodal Digital Biomarkers.",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Alzheimer Disease",
        "MCI"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "Altoida",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "50 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "50 Years and older"
      },
      "enrollment_count": 614,
      "start_date": "2024-01-12",
      "completion_date": "2025-01-10",
      "has_results": false,
      "last_update_posted_date": "2025-02-19",
      "last_synced_at": "2026-10-17T22:48:48.144Z",
      "location_count": 1,
      "location_summary": "Orlando, Florida",
      "locations": [
        {
          "city": "Orlando",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06223438"
    },
    {
      "nct_id": "NCT04933435",
      "title": "Interventional Radiology Liver Directed Therapies and Hypofractionated Image-Guided Radiation Therapy in Veteran and Non-Veteran, Non-surgical Hepatocellular Carcinoma Patients",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Liver Cancer"
      ],
      "interventions": [
        {
          "name": "Quality of life questionnaires",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Duke University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 78,
      "start_date": "2020-11-12",
      "completion_date": "2027-02",
      "has_results": false,
      "last_update_posted_date": "2025-11-19",
      "last_synced_at": "2026-10-17T22:48:48.144Z",
      "location_count": 2,
      "location_summary": "Durham, North Carolina",
      "locations": [
        {
          "city": "Durham",
          "state": "North Carolina"
        },
        {
          "city": "Durham",
          "state": "North Carolina"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04933435"
    },
    {
      "nct_id": "NCT05533658",
      "title": "The Effects of VisionPure™ on Indices of Vision Health and Cognitive Function",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Eye Health",
        "Vision",
        "Cognitive Function"
      ],
      "interventions": [
        {
          "name": "VisionPure Dietary Supplement",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Placebo",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "Applied Science & Performance Institute",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "40 Years",
        "sex": "ALL",
        "summary": "18 Years to 40 Years"
      },
      "enrollment_count": 15,
      "start_date": "2022-08-01",
      "completion_date": "2023-02-03",
      "has_results": false,
      "last_update_posted_date": "2023-05-26",
      "last_synced_at": "2026-10-17T22:48:48.144Z",
      "location_count": 3,
      "location_summary": "Lutz, Florida • Tampa, Florida",
      "locations": [
        {
          "city": "Lutz",
          "state": "Florida"
        },
        {
          "city": "Tampa",
          "state": "Florida"
        },
        {
          "city": "Tampa",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05533658"
    },
    {
      "nct_id": "NCT02107105",
      "title": "Evaluation of Quality of Life and Utilities Following Surgical Treatment of Stage I-IV Rectal Cancer",
      "overall_status": "RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Rectal Adenocarcinoma",
        "Stage I Rectal Cancer AJCC v8",
        "Stage II Rectal Cancer AJCC v8",
        "Stage IIA Rectal Cancer AJCC v8",
        "Stage IIB Rectal Cancer AJCC v8",
        "Stage IIC Rectal Cancer AJCC v8",
        "Stage III Rectal Cancer AJCC v8",
        "Stage IIIA Rectal Cancer AJCC v8",
        "Stage IIIB Rectal Cancer AJCC v8",
        "Stage IIIC Rectal Cancer AJCC v8",
        "Stage IV Rectal Cancer AJCC v8",
        "Stage IVA Rectal Cancer AJCC v8",
        "Stage IVB Rectal Cancer AJCC v8",
        "Stage IVC Rectal Cancer AJCC v8"
      ],
      "interventions": [
        {
          "name": "Quality-of-Life Assessment",
          "type": "OTHER"
        },
        {
          "name": "Questionnaire Administration",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "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": 430,
      "start_date": "2014-05-16",
      "completion_date": "2030-05-31",
      "has_results": false,
      "last_update_posted_date": "2026-08-31",
      "last_synced_at": "2026-10-17T22:48:48.144Z",
      "location_count": 1,
      "location_summary": "Houston, Texas",
      "locations": [
        {
          "city": "Houston",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02107105"
    }
  ]
}