{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Symptom+questionnaires+-+Observational+Study",
    "query": {
      "intervention": "Symptom questionnaires - Observational Study"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 55,
    "total_pages": 6,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Symptom+questionnaires+-+Observational+Study&page=2&page_size=10",
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-09-13T09:17:09.066Z",
  "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": "NCT04544683",
      "title": "Effectiveness of Cervical Transforaminal Epidural Steroid Injection",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Cervical Radiculopathy",
        "Cervical Spondylosis",
        "Disk, Herniated"
      ],
      "interventions": [
        {
          "name": "Cervical Transforaminal Epidural Injection with dexamethasone sodium phosphate",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "University of Utah",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "80 Years",
        "sex": "ALL",
        "summary": "18 Years to 80 Years"
      },
      "enrollment_count": 33,
      "start_date": "2018-10-23",
      "completion_date": "2023-12-07",
      "has_results": true,
      "last_update_posted_date": "2024-04-10",
      "last_synced_at": "2026-09-13T09:17:09.066Z",
      "location_count": 1,
      "location_summary": "Salt Lake City, Utah",
      "locations": [
        {
          "city": "Salt Lake City",
          "state": "Utah"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04544683"
    },
    {
      "nct_id": "NCT01476644",
      "title": "How Has Glaucoma Affected Your Quality of Life?",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Glaucoma",
        "Quality of Life"
      ],
      "interventions": [
        {
          "name": "Clinical evaluation",
          "type": "OTHER"
        },
        {
          "name": "Performance based measures",
          "type": "OTHER"
        },
        {
          "name": "Subjective measures of vision-related quality of life",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Wills Eye",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "80 Years",
        "sex": "ALL",
        "summary": "18 Years to 80 Years"
      },
      "enrollment_count": 161,
      "start_date": "2011-10",
      "completion_date": "2017-06",
      "has_results": true,
      "last_update_posted_date": "2019-11-15",
      "last_synced_at": "2026-09-13T09:17:09.066Z",
      "location_count": 1,
      "location_summary": "Philadelphia, Pennsylvania",
      "locations": [
        {
          "city": "Philadelphia",
          "state": "Pennsylvania"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01476644"
    },
    {
      "nct_id": "NCT04776837",
      "title": "Predicting Disease Progression and/or Recurrence in Cancer",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Patient Reported Outcome Measures",
        "Colorectal Cancer",
        "Pancreatic Cancer",
        "Biliary Tract Cancer",
        "Esophageal Cancer",
        "Metastatic Cancer",
        "Disease Progression",
        "Survival Analysis"
      ],
      "interventions": [
        {
          "name": "Observational Cohort",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "Massachusetts General Hospital",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 159,
      "start_date": "2019-05-15",
      "completion_date": "2022-10-19",
      "has_results": false,
      "last_update_posted_date": "2026-05-15",
      "last_synced_at": "2026-09-13T09:17:09.066Z",
      "location_count": 1,
      "location_summary": "Boston, Massachusetts",
      "locations": [
        {
          "city": "Boston",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04776837"
    },
    {
      "nct_id": "NCT04557748",
      "title": "LURN: Urinary Urgency Phenotyping Protocol",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Lower Urinary Tract Symptoms"
      ],
      "interventions": [
        {
          "name": "Observational",
          "type": "OTHER"
        },
        {
          "name": "Observational Controls",
          "type": "OTHER"
        },
        {
          "name": "Central Sensitization",
          "type": "OTHER"
        },
        {
          "name": "Physical Activity and Sleep Tracker",
          "type": "OTHER"
        },
        {
          "name": "Physical Activity and Sleep Tracker Controls",
          "type": "OTHER"
        },
        {
          "name": "Organ-Based",
          "type": "OTHER"
        },
        {
          "name": "Qualitative Assessment of Patients with Urinary Urgency",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Arbor Research Collaborative for Health",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 1030,
      "start_date": "2021-02-17",
      "completion_date": "2025-08-12",
      "has_results": false,
      "last_update_posted_date": "2026-07-24",
      "last_synced_at": "2026-09-13T09:17:09.066Z",
      "location_count": 6,
      "location_summary": "Chicago, Illinois • Iowa City, Iowa • Ann Arbor, Michigan + 3 more",
      "locations": [
        {
          "city": "Chicago",
          "state": "Illinois"
        },
        {
          "city": "Iowa City",
          "state": "Iowa"
        },
        {
          "city": "Ann Arbor",
          "state": "Michigan"
        },
        {
          "city": "St Louis",
          "state": "Missouri"
        },
        {
          "city": "Durham",
          "state": "North Carolina"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04557748"
    },
    {
      "nct_id": "NCT02598752",
      "title": "Feasibility and Safety of Functional Performance Testing in Patients Undergoing Hematopoietic Cell Transplantation",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Acute Myeloid Leukemia",
        "Myelodysplastic Syndrome",
        "Hematological Malignancy",
        "Leukemia",
        "Lymphoma",
        "Myeloma"
      ],
      "interventions": [
        {
          "name": "Symptom-limited cardiopulmonary exercise test (CPET)",
          "type": "OTHER"
        },
        {
          "name": "Resting assessment of cardiac function by echocardiography",
          "type": "OTHER"
        },
        {
          "name": "Post-exercise assessment of cardiac function by echocardiography",
          "type": "OTHER"
        },
        {
          "name": "Pulmonary function",
          "type": "OTHER"
        },
        {
          "name": "Patient-reported outcomes questionnaire",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "OTHER",
        "BEHAVIORAL"
      ],
      "sponsor": "Memorial Sloan Kettering Cancer Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "21 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "21 Years and older"
      },
      "enrollment_count": 11,
      "start_date": "2015-11",
      "completion_date": "2020-04-10",
      "has_results": false,
      "last_update_posted_date": "2020-04-16",
      "last_synced_at": "2026-09-13T09:17:09.066Z",
      "location_count": 1,
      "location_summary": "New York, New York",
      "locations": [
        {
          "city": "New York",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02598752"
    },
    {
      "nct_id": "NCT00259909",
      "title": "Observational Study Of An Electronic Questionnaire In Patients With Chronic Obstructive Pulmonary Disease (COPD)",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Pulmonary Disease, Chronic Obstructive",
        "Infections, Bacterial"
      ],
      "interventions": [
        {
          "name": "GSK questionnaire",
          "type": "OTHER"
        },
        {
          "name": "St. George's Respiratory Questionnaire",
          "type": "OTHER"
        },
        {
          "name": "Acute Short Form 12 version 2",
          "type": "OTHER"
        },
        {
          "name": "Global Efficacy questionnaire",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "GlaxoSmithKline",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "40 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "40 Years and older"
      },
      "enrollment_count": 259,
      "start_date": "2005-11-02",
      "completion_date": "2006-11-07",
      "has_results": false,
      "last_update_posted_date": "2017-10-12",
      "last_synced_at": "2026-09-13T09:17:09.066Z",
      "location_count": 79,
      "location_summary": "Birmingham, Alabama • Hueytown, Alabama • Jasper, Alabama + 69 more",
      "locations": [
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Hueytown",
          "state": "Alabama"
        },
        {
          "city": "Jasper",
          "state": "Alabama"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00259909"
    },
    {
      "nct_id": "NCT05537259",
      "title": "BUMPP: A Study to Better Understand Mood During the Perinatal Period",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Pregnancy",
        "Postpartum",
        "Mental Health Issue"
      ],
      "interventions": [
        {
          "name": "Observation Group",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "University of Minnesota",
      "sponsor_class": "OTHER",
      "healthy_volunteers": null,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "FEMALE",
        "summary": "18 Years and older · Female only"
      },
      "enrollment_count": 168,
      "start_date": "2022-06-27",
      "completion_date": "2024-02-20",
      "has_results": false,
      "last_update_posted_date": "2025-01-13",
      "last_synced_at": "2026-09-13T09:17:09.066Z",
      "location_count": 1,
      "location_summary": "Minneapolis, Minnesota",
      "locations": [
        {
          "city": "Minneapolis",
          "state": "Minnesota"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05537259"
    },
    {
      "nct_id": "NCT04088773",
      "title": "Biomarkers of Intestinal Fibrosis in Small Bowel Crohn's Disease",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Crohn Disease"
      ],
      "interventions": [
        {
          "name": "blood biomarkers",
          "type": "DIAGNOSTIC_TEST"
        },
        {
          "name": "stool biomarkers",
          "type": "DIAGNOSTIC_TEST"
        },
        {
          "name": "MRI imaging",
          "type": "DIAGNOSTIC_TEST"
        }
      ],
      "intervention_types": [
        "DIAGNOSTIC_TEST"
      ],
      "sponsor": "Children's Hospital Medical Center, Cincinnati",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "8 Years",
        "maximum_age": "70 Years",
        "sex": "ALL",
        "summary": "8 Years to 70 Years"
      },
      "enrollment_count": 232,
      "start_date": "2019-11-01",
      "completion_date": "2026-06",
      "has_results": false,
      "last_update_posted_date": "2025-06-13",
      "last_synced_at": "2026-09-13T09:17:09.066Z",
      "location_count": 4,
      "location_summary": "Atlanta, Georgia • Ann Arbor, Michigan • Rochester, Minnesota + 1 more",
      "locations": [
        {
          "city": "Atlanta",
          "state": "Georgia"
        },
        {
          "city": "Ann Arbor",
          "state": "Michigan"
        },
        {
          "city": "Rochester",
          "state": "Minnesota"
        },
        {
          "city": "Cincinnati",
          "state": "Ohio"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04088773"
    },
    {
      "nct_id": "NCT04378101",
      "title": "Eating Disorders Genetics Initiative",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Anorexia Nervosa",
        "Bulimia Nervosa",
        "Binge-Eating Disorder"
      ],
      "interventions": [
        {
          "name": "Eating disorder diagnosis group",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "University of North Carolina, Chapel Hill",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "15 Years",
        "maximum_age": "99 Years",
        "sex": "ALL",
        "summary": "15 Years to 99 Years"
      },
      "enrollment_count": 17991,
      "start_date": "2020-06-12",
      "completion_date": "2023-05-31",
      "has_results": false,
      "last_update_posted_date": "2023-06-06",
      "last_synced_at": "2026-09-13T09:17:09.066Z",
      "location_count": 1,
      "location_summary": "Chapel Hill, North Carolina",
      "locations": [
        {
          "city": "Chapel Hill",
          "state": "North Carolina"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04378101"
    },
    {
      "nct_id": "NCT00576992",
      "title": "Demographics and Findings of Upper Endoscopy Patients",
      "overall_status": "TERMINATED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Barrett Esophagus",
        "Gastroesophageal Reflux"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "Midwest Biomedical Research",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 1177,
      "start_date": "2003-01",
      "completion_date": "2017-05",
      "has_results": false,
      "last_update_posted_date": "2017-05-30",
      "last_synced_at": "2026-09-13T09:17:09.066Z",
      "location_count": 1,
      "location_summary": "Kansas City, Missouri",
      "locations": [
        {
          "city": "Kansas City",
          "state": "Missouri"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00576992"
    }
  ]
}