{ "api_version": "1", "request": { "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Retrospective+study&page=11", "query": { "intervention": "Retrospective study", "page": 11 }, "page_size": 10 }, "pagination": { "page": 11, "page_size": 10, "total_count": 1214, "total_pages": 122, "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Retrospective+study&page=12&page_size=10", "previous_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Retrospective+study&page=10&page_size=10" }, "source": "remote", "last_synced_at": "2026-10-30T03:20:02.452Z", "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": "NCT02319460", "title": "An Observational Cohort Study to Investigate the Risk of Thromboembolic Events in Patients Receiving Kcentra® or Plasma to Reverse Vitamin K Antagonist (VKA) Therapy in the Setting of Acute Major Bleeding", "overall_status": "COMPLETED", "study_type": "OBSERVATIONAL", "phases": [], "conditions": [ "Hemorrhage" ], "interventions": [ { "name": "Kcentra®", "type": "BIOLOGICAL" }, { "name": "Plasma", "type": "BIOLOGICAL" } ], "intervention_types": [ "BIOLOGICAL" ], "sponsor": "CSL Behring", "sponsor_class": "INDUSTRY", "healthy_volunteers": false, "eligibility": { "minimum_age": "18 Years", "maximum_age": null, "sex": "ALL", "summary": "18 Years and older" }, "enrollment_count": 2238, "start_date": "2014-04-24", "completion_date": "2020-06-30", "has_results": false, "last_update_posted_date": "2021-05-26", "last_synced_at": "2026-10-30T03:20:02.452Z", "location_count": 1, "location_summary": "Oakland, California", "locations": [ { "city": "Oakland", "state": "California" } ], "official_url": "https://clinicaltrials.gov/study/NCT02319460" }, { "nct_id": "NCT04556396", "title": "Intraoperative Cone-beam CT for Percutaneous Nephrolithotomy", "overall_status": "COMPLETED", "study_type": "INTERVENTIONAL", "phases": [ "NA" ], "conditions": [ "Nephrolithiasis" ], "interventions": [ { "name": "Cone beam CT", "type": "DIAGNOSTIC_TEST" } ], "intervention_types": [ "DIAGNOSTIC_TEST" ], "sponsor": "Loyola University", "sponsor_class": "OTHER", "healthy_volunteers": false, "eligibility": { "minimum_age": "18 Years", "maximum_age": null, "sex": "ALL", "summary": "18 Years and older" }, "enrollment_count": 234, "start_date": "2020-06-25", "completion_date": "2022-05-01", "has_results": true, "last_update_posted_date": "2024-06-06", "last_synced_at": "2026-10-30T03:20:02.452Z", "location_count": 1, "location_summary": "Maywood, Illinois", "locations": [ { "city": "Maywood", "state": "Illinois" } ], "official_url": "https://clinicaltrials.gov/study/NCT04556396" }, { "nct_id": "NCT07580183", "title": "Spatial Scene Recognition Memory in Epilepsy Surgery", "overall_status": "RECRUITING", "study_type": "INTERVENTIONAL", "phases": [ "NA" ], "conditions": [ "Focal Epilepsy", "Temporal Lobe Epilepsy", "Medically Refractory Epilepsy", "Memory Disorders", "Epilepsy Comorbidities", "Epilepsy Intractable", "Epilepsy Surgery", "Epilepsy, Temporal Lobe", "Memory Deficits", "Memory Disorder, Spatial", "Memory Dysfunction", "Spatial Perception" ], "interventions": [ { "name": "Virtual Tour Recognition Memory Task", "type": "BEHAVIORAL" }, { "name": "Intracranial EEG Recording with Research Electrodes (Aim III only)", "type": "DEVICE" }, { "name": "MRI Neuroimaging and Neuropsychological Assessment (Aim I)", "type": "DIAGNOSTIC_TEST" } ], "intervention_types": [ "BEHAVIORAL", "DEVICE", "DIAGNOSTIC_TEST" ], "sponsor": "University of California, Davis", "sponsor_class": "OTHER", "healthy_volunteers": true, "eligibility": { "minimum_age": "18 Years", "maximum_age": "55 Years", "sex": "ALL", "summary": "18 Years to 55 Years" }, "enrollment_count": 620, "start_date": "2024-07-01", "completion_date": "2030-06-30", "has_results": false, "last_update_posted_date": "2026-05-12", "last_synced_at": "2026-10-30T03:20:02.452Z", "location_count": 2, "location_summary": "Sacramento, California • Atlanta, Georgia", "locations": [ { "city": "Sacramento", "state": "California" }, { "city": "Atlanta", "state": "Georgia" } ], "official_url": "https://clinicaltrials.gov/study/NCT07580183" }, { "nct_id": "NCT04028479", "title": "The Registry of Oncology Outcomes Associated With Testing and Treatment", "overall_status": "COMPLETED", "study_type": "OBSERVATIONAL", "phases": [], "conditions": [ "Adenocarcinoma", "Adenocystic Carcinoma", "Anal Cancer", "Appendix Cancer", "Brain Tumor", "Glioblastoma", "Astrocytoma", "Bile Duct Cancer", "Cholangiocarcinoma", "Bladder Cancer", "Bone Cancer", "Synovial Sarcoma", "Chondrosarcoma", "Liposarcoma", "Sarcoma, Kaposi", "Sarcoma,Soft Tissue", "Sarcoma", "Osteosarcoma", "CNS Cancer", "Brain Stem Neoplasms", "Breast Cancer", "Cervical Cancer", "Colorectal Cancer", "Rectal Cancer", "Colon Cancer", "Esophageal Cancer", "Esophagus Cancer", "Cancer of Colon", "Pancreatic Cancer", "Cancer of Pancreas", "Testis Cancer", "Testicular Cancer", "Ureter Cancer", "Renal Cell Carcinoma", "Kidney Cancer", "Gestational Trophoblastic Tumor", "Head and Neck Neoplasms", "Parotid Tumor", "Larynx Cancer", "Tongue Cancer", "Pharynx Cancer", "Salivary Gland Cancer", "Acute Myeloid Leukemia", "Chronic Myeloid Leukemia", "Acute Lymphoblastic Leukemia", "Multiple Myeloma", "Non Hodgkin Lymphoma", "Carcinoid Tumor", "Lung Cancer", "Neuroendocrine Tumors", "Mesothelioma", "Thyroid Cancer", "Parathyroid Neoplasms", "Adrenal Cancer", "Small Bowel Cancer", "Stomach Cancer", "Liver Cancer", "Hepatic Cancer", "Melanoma", "Skin Cancer", "Unknown Primary Tumors", "Uterine Cancer", "Fallopian Tube Cancer", "Ovarian Cancer", "Prostate Cancer", "Vaginal Cancer", "Penile Cancer", "Vulvar Cancer", "Waldenstrom Macroglobulinemia", "Cancer, Advanced", "Thymus Cancer", "Nasopharyngeal Carcinoma", "Multiple Endocrine Neoplasia", "Pheochromocytoma", "Small Cell Carcinoma", "Pulmonary Carcinoma" ], "interventions": [ { "name": "Biomarker Testing (L)", "type": "DIAGNOSTIC_TEST" }, { "name": "Systemic Treatment (T)", "type": "DRUG" }, { "name": "Patient Reported Outcomes (P)", "type": "OTHER" } ], "intervention_types": [ "DIAGNOSTIC_TEST", "DRUG", "OTHER" ], "sponsor": "Taproot Health", "sponsor_class": "INDUSTRY", "healthy_volunteers": false, "eligibility": { "minimum_age": "18 Years", "maximum_age": null, "sex": "ALL", "summary": "18 Years and older" }, "enrollment_count": 167, "start_date": "2021-05-05", "completion_date": "2024-10-31", "has_results": false, "last_update_posted_date": "2024-12-18", "last_synced_at": "2026-10-30T03:20:02.452Z", "location_count": 2, "location_summary": "Idaho Falls, Idaho • Laredo, Texas", "locations": [ { "city": "Idaho Falls", "state": "Idaho" }, { "city": "Laredo", "state": "Texas" } ], "official_url": "https://clinicaltrials.gov/study/NCT04028479" }, { "nct_id": "NCT06774027", "title": "Prospective Registry of ADC as First- and Second-line Treatment for Breast Cancer", "overall_status": "RECRUITING", "study_type": "OBSERVATIONAL", "phases": [], "conditions": [ "HER2-negative Breast Cancer", "HER2 Negative Breast Carcinoma", "Metastatic Breast Cancer", "HR+ HER2 Breast Cancer", "Metastatic Triple Negative Breast Cancers", "Metastatic Triple-Negative Breast Carcinoma" ], "interventions": [ { "name": "Specimen collection", "type": "PROCEDURE" }, { "name": "Non-Investigational Antibody-Drug Conjugates (ADC)", "type": "DRUG" }, { "name": "Medical Record Review", "type": "OTHER" } ], "intervention_types": [ "PROCEDURE", "DRUG", "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": 100, "start_date": "2025-10-08", "completion_date": "2030-12-31", "has_results": false, "last_update_posted_date": "2026-10-16", "last_synced_at": "2026-10-30T03:20:02.452Z", "location_count": 3, "location_summary": "San Francisco, California • The Bronx, New York • Durham, North Carolina", "locations": [ { "city": "San Francisco", "state": "California" }, { "city": "The Bronx", "state": "New York" }, { "city": "Durham", "state": "North Carolina" } ], "official_url": "https://clinicaltrials.gov/study/NCT06774027" }, { "nct_id": "NCT03781596", "title": "EoE RCT Fluticasone and Omeprazole vs Fluticasone Alone", "overall_status": "UNKNOWN", "study_type": "INTERVENTIONAL", "phases": [ "PHASE4" ], "conditions": [ "Eosinophilic Esophagitis" ], "interventions": [ { "name": "Retrospective evaluation of endoscopy prior to study drug", "type": "DIAGNOSTIC_TEST" }, { "name": "Symptom Survey", "type": "OTHER" }, { "name": "Medication Compliance Phone Call", "type": "OTHER" }, { "name": "Endoscopy while on study drug", "type": "DIAGNOSTIC_TEST" }, { "name": "Fluticasone", "type": "DRUG" }, { "name": "Omeprazole", "type": "DRUG" }, { "name": "Placebo oral capsule", "type": "DRUG" } ], "intervention_types": [ "DIAGNOSTIC_TEST", "OTHER", "DRUG" ], "sponsor": "Claire Daniels", "sponsor_class": "FED", "healthy_volunteers": false, "eligibility": { "minimum_age": "6 Years", "maximum_age": "60 Years", "sex": "ALL", "summary": "6 Years to 60 Years" }, "enrollment_count": 100, "start_date": "2018-10-02", "completion_date": "2022-10-02", "has_results": false, "last_update_posted_date": "2018-12-20", "last_synced_at": "2026-10-30T03:20:02.452Z", "location_count": 1, "location_summary": "Bethesda, Maryland", "locations": [ { "city": "Bethesda", "state": "Maryland" } ], "official_url": "https://clinicaltrials.gov/study/NCT03781596" }, { "nct_id": "NCT06651645", "title": "Pre- vs Post-Pandemic Risk-adjusted Survival Rates in the US Hospitals", "overall_status": "ACTIVE_NOT_RECRUITING", "study_type": "OBSERVATIONAL", "phases": [], "conditions": [ "In-hospital Mortality", "Non-COVID Deaths", "Surge" ], "interventions": [ { "name": "COVID-19 Surge", "type": "OTHER" } ], "intervention_types": [ "OTHER" ], "sponsor": "National Institutes of Health Clinical Center (CC)", "sponsor_class": "NIH", "healthy_volunteers": false, "eligibility": { "minimum_age": "18 Years", "maximum_age": null, "sex": "ALL", "summary": "18 Years and older" }, "enrollment_count": 30000000, "start_date": "2024-07-30", "completion_date": "2025-06-30", "has_results": false, "last_update_posted_date": "2025-04-29", "last_synced_at": "2026-10-30T03:20:02.452Z", "location_count": 1, "location_summary": "Bethesda, Maryland", "locations": [ { "city": "Bethesda", "state": "Maryland" } ], "official_url": "https://clinicaltrials.gov/study/NCT06651645" }, { "nct_id": "NCT03289000", "title": "A Retrospective Study to Evaluate the ConforMIS iTotal® Posterior Stabilized (PS) Knee Replacement System", "overall_status": "COMPLETED", "study_type": "OBSERVATIONAL", "phases": [], "conditions": [ "Osteo Arthritis Knee" ], "interventions": [ { "name": "iTotal Posterior Stabilized (PS) Knee Replacement System", "type": "DEVICE" } ], "intervention_types": [ "DEVICE" ], "sponsor": "Restor3D", "sponsor_class": "INDUSTRY", "healthy_volunteers": false, "eligibility": { "minimum_age": "18 Years", "maximum_age": null, "sex": "ALL", "summary": "18 Years and older" }, "enrollment_count": 93, "start_date": "2017-04-24", "completion_date": "2017-12-31", "has_results": false, "last_update_posted_date": "2023-10-25", "last_synced_at": "2026-10-30T03:20:02.452Z", "location_count": 2, "location_summary": "Nashville, Tennessee • Huntington, West Virginia", "locations": [ { "city": "Nashville", "state": "Tennessee" }, { "city": "Huntington", "state": "West Virginia" } ], "official_url": "https://clinicaltrials.gov/study/NCT03289000" }, { "nct_id": "NCT07150221", "title": "MDR Vivacit-E Elevated Study", "overall_status": "ENROLLING_BY_INVITATION", "study_type": "OBSERVATIONAL", "phases": [], "conditions": [ "Osteoarthritis (OA) of the Hip", "Avascular Necrosis of Bone of Hip", "Protrusio Acetabuli", "Traumatic Arthropathy-Hip", "Slipped Capital Femoral Epiphyses", "Fused Hip", "Fracture of Pelvis", "Diastrophic Variant" ], "interventions": [ { "name": "Vivacit-E Elevated Liners", "type": "DEVICE" } ], "intervention_types": [ "DEVICE" ], "sponsor": "Zimmer Biomet", "sponsor_class": "INDUSTRY", "healthy_volunteers": false, "eligibility": { "minimum_age": "18 Years", "maximum_age": null, "sex": "ALL", "summary": "18 Years and older" }, "enrollment_count": 52, "start_date": "2026-01-07", "completion_date": "2027-12", "has_results": false, "last_update_posted_date": "2026-04-01", "last_synced_at": "2026-10-30T03:20:02.452Z", "location_count": 1, "location_summary": "South Bend, Indiana", "locations": [ { "city": "South Bend", "state": "Indiana" } ], "official_url": "https://clinicaltrials.gov/study/NCT07150221" }, { "nct_id": "NCT05902494", "title": "HER2 and LA/mUC: A Multi-country Chart Review Cohort Study", "overall_status": "COMPLETED", "study_type": "OBSERVATIONAL", "phases": [], "conditions": [ "Urothelial Carcinoma" ], "interventions": [], "intervention_types": [], "sponsor": "Seagen, a wholly owned subsidiary of Pfizer", "sponsor_class": "INDUSTRY", "healthy_volunteers": false, "eligibility": { "minimum_age": "18 Years", "maximum_age": null, "sex": "ALL", "summary": "18 Years and older" }, "enrollment_count": 389, "start_date": "2023-06-29", "completion_date": "2025-06-18", "has_results": false, "last_update_posted_date": "2025-07-20", "last_synced_at": "2026-10-30T03:20:02.452Z", "location_count": 11, "location_summary": "Phoenix, Arizona • Orange, California • Palo Alto, California + 8 more", "locations": [ { "city": "Phoenix", "state": "Arizona" }, { "city": "Orange", "state": "California" }, { "city": "Palo Alto", "state": "California" }, { "city": "San Francisco", "state": "California" }, { "city": "Santa Monica", "state": "California" } ], "official_url": "https://clinicaltrials.gov/study/NCT05902494" } ] }