{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=observational+study&page=27",
    "query": {
      "intervention": "observational study",
      "page": 27
    },
    "page_size": 10
  },
  "pagination": {
    "page": 27,
    "page_size": 10,
    "total_count": 4385,
    "total_pages": 439,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=observational+study&page=28&page_size=10",
    "previous_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=observational+study&page=26&page_size=10"
  },
  "source": "remote",
  "last_synced_at": "2026-10-20T03:06:55.077Z",
  "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": "NCT00791635",
      "title": "Longitudinal Evaluation of Women Undergoing Pelvic Surgery for the Treatment of Gynecologic Cancer",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Cervical Carcinoma",
        "Endometrial Carcinoma",
        "Malignant Female Reproductive System Neoplasm",
        "Vaginal Carcinoma",
        "Vulvar Carcinoma"
      ],
      "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": "FEMALE",
        "summary": "18 Years and older · Female only"
      },
      "enrollment_count": 79,
      "start_date": "2008-07-11",
      "completion_date": "2027-09-30",
      "has_results": false,
      "last_update_posted_date": "2026-09-14",
      "last_synced_at": "2026-10-20T03:06:55.077Z",
      "location_count": 1,
      "location_summary": "Houston, Texas",
      "locations": [
        {
          "city": "Houston",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00791635"
    },
    {
      "nct_id": "NCT05347108",
      "title": "Real-Time Accurate Pathology Inspection and Decompression Study",
      "overall_status": "WITHDRAWN",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Spine Injuries and Disorders",
        "Pain, Chronic",
        "Pain, Back",
        "Pain, Neck",
        "Radiculopathy"
      ],
      "interventions": [
        {
          "name": "laser-assisted neural decompression (LAND) procedure",
          "type": "PROCEDURE"
        }
      ],
      "intervention_types": [
        "PROCEDURE"
      ],
      "sponsor": "KM Clinical Research Group",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "85 Years",
        "sex": "ALL",
        "summary": "18 Years to 85 Years"
      },
      "enrollment_count": 0,
      "start_date": "2022-05-01",
      "completion_date": "2023-07-31",
      "has_results": false,
      "last_update_posted_date": "2022-04-26",
      "last_synced_at": "2026-10-20T03:06:55.077Z",
      "location_count": 1,
      "location_summary": "Lā‘ie, Hawaii",
      "locations": [
        {
          "city": "Lā‘ie",
          "state": "Hawaii"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05347108"
    },
    {
      "nct_id": "NCT02508948",
      "title": "Endotracheal Intubation Among the Critically Ill: HEMAIR Pilot Study",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Tracheal Intubation"
      ],
      "interventions": [],
      "intervention_types": [],
      "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": 1288,
      "start_date": "2015-08",
      "completion_date": "2019-12",
      "has_results": false,
      "last_update_posted_date": "2020-01-30",
      "last_synced_at": "2026-10-20T03:06:55.077Z",
      "location_count": 16,
      "location_summary": "Scottsdale, Arizona • Los Angeles, California • Modesto, California + 13 more",
      "locations": [
        {
          "city": "Scottsdale",
          "state": "Arizona"
        },
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "Modesto",
          "state": "California"
        },
        {
          "city": "Bridgeport",
          "state": "Connecticut"
        },
        {
          "city": "Jacksonville",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02508948"
    },
    {
      "nct_id": "NCT05179824",
      "title": "Tempus Priority Study: A Pan-tumor Observational Study",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Breast Cancer",
        "Prostate Cancer",
        "Bladder Cancer",
        "Lung Cancer",
        "Brain Cancer",
        "Pancreatic Cancer",
        "Ovarian Cancer",
        "Fallopian Tube Cancer",
        "Peritoneal Cancer",
        "Cancer of Liver",
        "Cancer of Colon",
        "Cancer of Head and Neck",
        "Cancer of Stomach",
        "Cancer of Gastrointestinal Tract",
        "Cancer of Rectum",
        "Cancer of Esophagus",
        "Cancer of Skin",
        "Cancer of Cervix",
        "Cancer of Kidney",
        "Cancer of Larynx",
        "Cancer of Endometrium",
        "Cancer of the Bile Duct",
        "Cancer of Vulva",
        "Cancer of Bone and Connective Tissue",
        "Leukemia",
        "Lymphoma",
        "Spinal Cord Cancer"
      ],
      "interventions": [
        {
          "name": "Observation",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Tempus AI",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": null,
        "sex": "ALL",
        "summary": "Not listed"
      },
      "enrollment_count": 1000,
      "start_date": "2020-10-19",
      "completion_date": "2030-10-19",
      "has_results": false,
      "last_update_posted_date": "2025-05-06",
      "last_synced_at": "2026-10-20T03:06:55.077Z",
      "location_count": 2,
      "location_summary": "Dallas, Texas • Houston, Texas",
      "locations": [
        {
          "city": "Dallas",
          "state": "Texas"
        },
        {
          "city": "Houston",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05179824"
    },
    {
      "nct_id": "NCT02515825",
      "title": "Angiographic Comparison in an Observational Study of CADence (The AMBIENCE Study)",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Coronary Artery Disease"
      ],
      "interventions": [
        {
          "name": "CADence",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "AUM Cardiovascular, Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "41 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "41 Years and older"
      },
      "enrollment_count": 101,
      "start_date": "2016-05",
      "completion_date": "2016-06",
      "has_results": true,
      "last_update_posted_date": "2021-04-08",
      "last_synced_at": "2026-10-20T03:06:55.077Z",
      "location_count": 3,
      "location_summary": "Huntsville, Alabama • Baltimore, Maryland • Saint Paul, Minnesota",
      "locations": [
        {
          "city": "Huntsville",
          "state": "Alabama"
        },
        {
          "city": "Baltimore",
          "state": "Maryland"
        },
        {
          "city": "Saint Paul",
          "state": "Minnesota"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02515825"
    },
    {
      "nct_id": "NCT04835597",
      "title": "Precision Performance Status Assessment in Breast Cancer Patients Receiving Neoadjuvant Chemotherapy",
      "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",
        "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",
        "Triple-Negative Breast Carcinoma"
      ],
      "interventions": [
        {
          "name": "Behavioral Assessment",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Electronic Health Record Review",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "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": 27,
      "start_date": "2022-08-15",
      "completion_date": "2024-08-21",
      "has_results": false,
      "last_update_posted_date": "2024-08-26",
      "last_synced_at": "2026-10-20T03:06:55.077Z",
      "location_count": 1,
      "location_summary": "Houston, Texas",
      "locations": [
        {
          "city": "Houston",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04835597"
    },
    {
      "nct_id": "NCT07611448",
      "title": "Blastocyst AI Assisted Morphokinetics in ART",
      "overall_status": "ENROLLING_BY_INVITATION",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Infertility Assisted Reproductive Technology",
        "Infertility (IVF Patients)"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "Viable Biosciences",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "45 Years",
        "sex": "FEMALE",
        "summary": "18 Years to 45 Years · Female only"
      },
      "enrollment_count": 1000,
      "start_date": "2026-03-05",
      "completion_date": "2029-03-30",
      "has_results": false,
      "last_update_posted_date": "2026-05-28",
      "last_synced_at": "2026-10-20T03:06:55.077Z",
      "location_count": 1,
      "location_summary": "Clovis, California",
      "locations": [
        {
          "city": "Clovis",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07611448"
    },
    {
      "nct_id": "NCT03012217",
      "title": "Prospective Clinical Evaluation of the FilmArray Respiratory Panel 2",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Upper Resp Tract Infection"
      ],
      "interventions": [
        {
          "name": "Observational Study",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "BioFire Diagnostics, LLC",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": null,
        "sex": "ALL",
        "summary": "Not listed"
      },
      "enrollment_count": 1612,
      "start_date": "2016-09",
      "completion_date": "2016-12",
      "has_results": false,
      "last_update_posted_date": "2017-01-12",
      "last_synced_at": "2026-10-20T03:06:55.077Z",
      "location_count": 3,
      "location_summary": "Maywood, Illinois • Columbus, Ohio • Salt Lake City, Utah",
      "locations": [
        {
          "city": "Maywood",
          "state": "Illinois"
        },
        {
          "city": "Columbus",
          "state": "Ohio"
        },
        {
          "city": "Salt Lake City",
          "state": "Utah"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03012217"
    },
    {
      "nct_id": "NCT07869498",
      "title": "Ocular Dysbiosis in Eyelid Disease",
      "overall_status": "RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Anterior Blepharitis"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "Brent Kramer",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 60,
      "start_date": "2026-08-07",
      "completion_date": "2027-03",
      "has_results": false,
      "last_update_posted_date": "2026-10-09",
      "last_synced_at": "2026-10-20T03:06:55.077Z",
      "location_count": 5,
      "location_summary": "Jacksonville, Florida • Pittsburg, Kansas • Mint Hill, North Carolina + 2 more",
      "locations": [
        {
          "city": "Jacksonville",
          "state": "Florida"
        },
        {
          "city": "Pittsburg",
          "state": "Kansas"
        },
        {
          "city": "Mint Hill",
          "state": "North Carolina"
        },
        {
          "city": "Shelby",
          "state": "North Carolina"
        },
        {
          "city": "Sioux Falls",
          "state": "South Dakota"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07869498"
    },
    {
      "nct_id": "NCT07262138",
      "title": "Active Surveillance in Older Women With ER+ Breast Cancer",
      "overall_status": "RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Early Stage Estrogen Receptor (ER) Positive Breast Cancer"
      ],
      "interventions": [
        {
          "name": "Active Surveillance",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "University of Pittsburgh",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "70 Years",
        "maximum_age": null,
        "sex": "FEMALE",
        "summary": "70 Years and older · Female only"
      },
      "enrollment_count": 50,
      "start_date": "2025-11-01",
      "completion_date": "2030-12-31",
      "has_results": false,
      "last_update_posted_date": "2026-09-11",
      "last_synced_at": "2026-10-20T03:06:55.077Z",
      "location_count": 1,
      "location_summary": "Pittsburgh, Pennsylvania",
      "locations": [
        {
          "city": "Pittsburgh",
          "state": "Pennsylvania"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07262138"
    }
  ]
}