{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=questionnaire",
    "query": {
      "intervention": "questionnaire"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 5432,
    "total_pages": 544,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=questionnaire&page=2&page_size=10",
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-09-03T21:35:11.540Z",
  "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": "NCT01914198",
      "title": "Revisiting Parental Survey for Screening for Obstructive Sleep Apnea in Patients Undergoing Polysomnography",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Sleep Apnea"
      ],
      "interventions": [
        {
          "name": "Sleep apnea symptom survey",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Vidya Raman",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "3 Years",
        "maximum_age": "18 Years",
        "sex": "ALL",
        "summary": "3 Years to 18 Years"
      },
      "enrollment_count": 948,
      "start_date": "2013-08",
      "completion_date": "2016-09-13",
      "has_results": false,
      "last_update_posted_date": "2018-01-05",
      "last_synced_at": "2026-09-03T21:35:11.540Z",
      "location_count": 1,
      "location_summary": "Columbus, Ohio",
      "locations": [
        {
          "city": "Columbus",
          "state": "Ohio"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01914198"
    },
    {
      "nct_id": "NCT07588698",
      "title": "Epcoritamab in Combination With R-CHOP for Patients With Aggressive Non-Hodgkin Lymphoma",
      "overall_status": "NOT_YET_RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Non-Hodgkin's B-cell Lymphoma",
        "Lymphoma Non-Hodgkin",
        "Diffuse Large B-Cell Lymphoma (DLBCL)"
      ],
      "interventions": [
        {
          "name": "Rituximab, Cyclophosphamide, Hydroxydaunorubicin, Oncovin, Prednisolone (R-CHOP)",
          "type": "DRUG"
        },
        {
          "name": "Epcoritamab",
          "type": "DRUG"
        },
        {
          "name": "Dexamethasone",
          "type": "DRUG"
        },
        {
          "name": "Positron Emission Tomography (PET)",
          "type": "PROCEDURE"
        },
        {
          "name": "Blood specimen collection",
          "type": "PROCEDURE"
        },
        {
          "name": "Questionnaires",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Computerized tomography (CT)",
          "type": "PROCEDURE"
        }
      ],
      "intervention_types": [
        "DRUG",
        "PROCEDURE",
        "BEHAVIORAL"
      ],
      "sponsor": "Carrie Ho, MD",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 20,
      "start_date": "2026-09-15",
      "completion_date": "2029-08-31",
      "has_results": false,
      "last_update_posted_date": "2026-08-19",
      "last_synced_at": "2026-09-03T21:35:11.540Z",
      "location_count": 2,
      "location_summary": "San Francisco, California",
      "locations": [
        {
          "city": "San Francisco",
          "state": "California"
        },
        {
          "city": "San Francisco",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07588698"
    },
    {
      "nct_id": "NCT03387163",
      "title": "Patient Reported Outcomes inVestigation Following Initiation of Drug Therapy With Entresto (Sacubitril/Valsartan) in Heart Failure",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Heart Failure, Systolic"
      ],
      "interventions": [
        {
          "name": "Sacubitril/Valsartan",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Novartis Pharmaceuticals",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 402,
      "start_date": "2018-02-09",
      "completion_date": "2019-06-21",
      "has_results": false,
      "last_update_posted_date": "2019-12-13",
      "last_synced_at": "2026-09-03T21:35:11.540Z",
      "location_count": 1,
      "location_summary": "New York, New York",
      "locations": [
        {
          "city": "New York",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03387163"
    },
    {
      "nct_id": "NCT03575832",
      "title": "Watchful Living in Improving Quality of Life in Participants With Localized Prostate Cancer on Active Surveillance and Their Partners",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Stage I Prostate Cancer AJCC v8",
        "Stage II Prostate Cancer AJCC v8",
        "Stage IIA Prostate Cancer AJCC v8",
        "Stage IIB Prostate Cancer AJCC v8",
        "Stage IIC Prostate Cancer AJCC v8",
        "Stage III Prostate Cancer AJCC v8",
        "Stage IIIA Prostate Cancer AJCC v8",
        "Stage IIIB Prostate Cancer AJCC v8",
        "Stage IIIC Prostate Cancer AJCC v8"
      ],
      "interventions": [
        {
          "name": "Counseling",
          "type": "OTHER"
        },
        {
          "name": "Informational Intervention",
          "type": "OTHER"
        },
        {
          "name": "Quality-of-Life Assessment",
          "type": "OTHER"
        },
        {
          "name": "Questionnaire Administration",
          "type": "OTHER"
        },
        {
          "name": "Telephone-Based Intervention",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "OTHER",
        "BEHAVIORAL"
      ],
      "sponsor": "M.D. Anderson Cancer Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 64,
      "start_date": "2018-01-25",
      "completion_date": "2028-12-31",
      "has_results": false,
      "last_update_posted_date": "2026-08-11",
      "last_synced_at": "2026-09-03T21:35:11.540Z",
      "location_count": 2,
      "location_summary": "Houston, Texas",
      "locations": [
        {
          "city": "Houston",
          "state": "Texas"
        },
        {
          "city": "Houston",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03575832"
    },
    {
      "nct_id": "NCT06206863",
      "title": "Community-Based Physical Activity Intervention for Underserved Cancer Survivors",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Hematopoietic and Lymphoid System Neoplasm",
        "Malignant Solid Neoplasm"
      ],
      "interventions": [
        {
          "name": "Exercise Intervention",
          "type": "OTHER"
        },
        {
          "name": "Questionnaire Administration",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Roswell Park Cancer Institute",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 200,
      "start_date": "2024-08-20",
      "completion_date": "2027-12-30",
      "has_results": false,
      "last_update_posted_date": "2026-07-29",
      "last_synced_at": "2026-09-03T21:35:11.540Z",
      "location_count": 1,
      "location_summary": "Buffalo, New York",
      "locations": [
        {
          "city": "Buffalo",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06206863"
    },
    {
      "nct_id": "NCT05929898",
      "title": "MRI Neurofeedback and Brain Circuits Related to Motivation in Healthy Participants",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Motivation",
        "Memory",
        "Self-regulation"
      ],
      "interventions": [
        {
          "name": "Ventral tegmental area of dopaminergic midbrain (VTA) fMRI neurofeedback",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "Duke University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "45 Years",
        "sex": "ALL",
        "summary": "18 Years to 45 Years"
      },
      "enrollment_count": 190,
      "start_date": "2023-07-30",
      "completion_date": "2026-09-09",
      "has_results": false,
      "last_update_posted_date": "2026-07-10",
      "last_synced_at": "2026-09-03T21:35:11.540Z",
      "location_count": 1,
      "location_summary": "Durham, North Carolina",
      "locations": [
        {
          "city": "Durham",
          "state": "North Carolina"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05929898"
    },
    {
      "nct_id": "NCT04263233",
      "title": "Evaluation of the Optimal Transition Program",
      "overall_status": "UNKNOWN",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "ESRD",
        "Hemodialysis"
      ],
      "interventions": [
        {
          "name": "Analysis using descriptive statistics of patient clinical outcomes.",
          "type": "OTHER"
        },
        {
          "name": "Surveys with participants using validated survey tools.",
          "type": "OTHER"
        },
        {
          "name": "Evaluation of the program process including time, costs, referral rates, admission to the program and length of stay.",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Satellite Healthcare",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 20,
      "start_date": "2020-01-29",
      "completion_date": "2022-12-31",
      "has_results": false,
      "last_update_posted_date": "2021-09-22",
      "last_synced_at": "2026-09-03T21:35:11.540Z",
      "location_count": 3,
      "location_summary": "Oakland, California • Sacramento, California • Memphis, Tennessee",
      "locations": [
        {
          "city": "Oakland",
          "state": "California"
        },
        {
          "city": "Sacramento",
          "state": "California"
        },
        {
          "city": "Memphis",
          "state": "Tennessee"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04263233"
    },
    {
      "nct_id": "NCT00951249",
      "title": "Feasibility Study of a Multi-Component Intervention for Black Men Who Have Sex With Men",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "HIV Infections"
      ],
      "interventions": [
        {
          "name": "Referral of Partners",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Screening for STIs and counseling",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Peer health care system navigators",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Enhanced counseling",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "HIV Prevention Trials Network",
      "sponsor_class": "NETWORK",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "MALE",
        "summary": "18 Years and older · Male only"
      },
      "enrollment_count": 1553,
      "start_date": "2009-07",
      "completion_date": "2011-12",
      "has_results": false,
      "last_update_posted_date": "2022-08-26",
      "last_synced_at": "2026-09-03T21:35:11.540Z",
      "location_count": 8,
      "location_summary": "Los Angeles, California • San Francisco, California • Washington D.C., District of Columbia + 4 more",
      "locations": [
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "San Francisco",
          "state": "California"
        },
        {
          "city": "Washington D.C.",
          "state": "District of Columbia"
        },
        {
          "city": "Atlanta",
          "state": "Georgia"
        },
        {
          "city": "Decatur",
          "state": "Georgia"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00951249"
    },
    {
      "nct_id": "NCT04876378",
      "title": "Impact of Breast Cancer Treatment on Joint Health, Cartilage Composition, and Bone Structure in the Knee and Hand",
      "overall_status": "TERMINATED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Anatomic Stage I Breast Cancer AJCC v8",
        "Anatomic Stage IA Breast Cancer AJCC v8",
        "Anatomic Stage IB Breast Cancer AJCC v8",
        "Anatomic Stage II Breast Cancer AJCC v8",
        "Anatomic Stage IIA Breast Cancer AJCC v8",
        "Anatomic Stage IIB Breast Cancer AJCC v8",
        "Anatomic Stage III Breast Cancer AJCC v8",
        "Anatomic Stage IIIA Breast Cancer AJCC v8",
        "Anatomic Stage IIIB Breast Cancer AJCC v8",
        "Anatomic Stage IIIC Breast Cancer AJCC v8",
        "Hormone Receptor Positive Breast Adenocarcinoma",
        "Prognostic Stage I Breast Cancer AJCC v8",
        "Prognostic Stage IA Breast Cancer AJCC v8",
        "Prognostic Stage IB Breast Cancer AJCC v8",
        "Prognostic Stage II Breast Cancer AJCC v8",
        "Prognostic Stage IIA Breast Cancer AJCC v8",
        "Prognostic Stage IIB Breast Cancer AJCC v8",
        "Prognostic Stage III Breast Cancer AJCC v8",
        "Prognostic Stage IIIA Breast Cancer AJCC v8",
        "Prognostic Stage IIIB Breast Cancer AJCC v8",
        "Prognostic Stage IIIC Breast Cancer AJCC v8"
      ],
      "interventions": [
        {
          "name": "Magnetic Resonance Imaging",
          "type": "PROCEDURE"
        },
        {
          "name": "Questionnaire Administration",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "PROCEDURE",
        "OTHER"
      ],
      "sponsor": "University of California, San Francisco",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": "70 Years",
        "sex": "ALL",
        "summary": "Up to 70 Years"
      },
      "enrollment_count": 8,
      "start_date": "2020-05-18",
      "completion_date": "2022-05-24",
      "has_results": false,
      "last_update_posted_date": "2022-09-09",
      "last_synced_at": "2026-09-03T21:35:11.540Z",
      "location_count": 1,
      "location_summary": "San Francisco, California",
      "locations": [
        {
          "city": "San Francisco",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04876378"
    },
    {
      "nct_id": "NCT06503978",
      "title": "Microbiota Transplant Therapy for Children With Both Autism Spectrum Disorder and Gastrointestinal Disorders",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Autism Spectrum Disorder",
        "Gastro-Intestinal Disorder",
        "Constipation",
        "Diarrhea"
      ],
      "interventions": [
        {
          "name": "MTP-101P",
          "type": "COMBINATION_PRODUCT"
        },
        {
          "name": "Vancomycin",
          "type": "COMBINATION_PRODUCT"
        },
        {
          "name": "Miralax",
          "type": "COMBINATION_PRODUCT"
        },
        {
          "name": "Antacid",
          "type": "COMBINATION_PRODUCT"
        },
        {
          "name": "Placebo MTP-101P",
          "type": "COMBINATION_PRODUCT"
        },
        {
          "name": "Placebo Vancomycin",
          "type": "COMBINATION_PRODUCT"
        }
      ],
      "intervention_types": [
        "COMBINATION_PRODUCT"
      ],
      "sponsor": "Gut-Brain-Axis Therapeutics Inc.",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "4 Years",
        "maximum_age": "18 Years",
        "sex": "ALL",
        "summary": "4 Years to 18 Years"
      },
      "enrollment_count": 60,
      "start_date": "2024-08-20",
      "completion_date": "2026-08-17",
      "has_results": false,
      "last_update_posted_date": "2024-09-25",
      "last_synced_at": "2026-09-03T21:35:11.540Z",
      "location_count": 1,
      "location_summary": "Tempe, Arizona",
      "locations": [
        {
          "city": "Tempe",
          "state": "Arizona"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06503978"
    }
  ]
}