{ "api_version": "1", "request": { "url": "https://clinicaltrialsfind.com/api/v1/search.json?condition=Observational+Study&page=7", "query": { "condition": "Observational Study", "page": 7 }, "page_size": 10 }, "pagination": { "page": 7, "page_size": 10, "total_count": 2011, "total_pages": 202, "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?condition=Observational+Study&page=8&page_size=10", "previous_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?condition=Observational+Study&page=6&page_size=10" }, "source": "remote", "last_synced_at": "2026-10-30T14:36:19.558Z", "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": "NCT01985997", "title": "Postmarketing Safety Study of Q/LAIV in Subjects 2 Through 49 Years of Age", "overall_status": "COMPLETED", "study_type": "OBSERVATIONAL", "phases": [], "conditions": [ "Observation Safety" ], "interventions": [], "intervention_types": [], "sponsor": "MedImmune LLC", "sponsor_class": "INDUSTRY", "healthy_volunteers": true, "eligibility": { "minimum_age": null, "maximum_age": null, "sex": "ALL", "summary": "Not listed" }, "enrollment_count": 95000, "start_date": "2014-01", "completion_date": "2014-07", "has_results": false, "last_update_posted_date": "2016-09-07", "last_synced_at": "2026-10-30T14:36:19.558Z", "location_count": 1, "location_summary": "Oakland, California", "locations": [ { "city": "Oakland", "state": "California" } ], "official_url": "https://clinicaltrials.gov/study/NCT01985997" }, { "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": "2026-10-30T14:36:19.558Z", "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": "NCT04495010", "title": "Neoadjuvant Nivolumab+Ipilimumab Followed by Adjuvant Nivolumab or Neoadjuvant Nivolumab+Ipilimumab Followed by Adjuvant Observation Compared With Adjuvant Nivolumab in Treatment-Naive High-risk Melanoma Participants", "overall_status": "WITHDRAWN", "study_type": "INTERVENTIONAL", "phases": [ "PHASE2" ], "conditions": [ "Melanoma" ], "interventions": [ { "name": "Nivolumab", "type": "BIOLOGICAL" }, { "name": "Ipilimumab", "type": "BIOLOGICAL" } ], "intervention_types": [ "BIOLOGICAL" ], "sponsor": "Bristol-Myers Squibb", "sponsor_class": "INDUSTRY", "healthy_volunteers": false, "eligibility": { "minimum_age": "12 Years", "maximum_age": null, "sex": "ALL", "summary": "12 Years and older" }, "enrollment_count": 0, "start_date": "2021-03-31", "completion_date": "2027-10-23", "has_results": false, "last_update_posted_date": "2021-03-19", "last_synced_at": "2026-10-30T14:36:19.558Z", "location_count": 23, "location_summary": "Gilbert, Arizona • Tucson, Arizona • San Francisco, California + 17 more", "locations": [ { "city": "Gilbert", "state": "Arizona" }, { "city": "Tucson", "state": "Arizona" }, { "city": "San Francisco", "state": "California" }, { "city": "Aurora", "state": "Colorado" }, { "city": "Tampa", "state": "Florida" } ], "official_url": "https://clinicaltrials.gov/study/NCT04495010" }, { "nct_id": "NCT05869760", "title": "Baylor Infant and Toddler Biomarker of Nutrition Study", "overall_status": "RECRUITING", "study_type": "OBSERVATIONAL", "phases": [], "conditions": [ "Healthy Nutrition", "Healthy Diet" ], "interventions": [ { "name": "Carotenoid Intake", "type": "OTHER" }, { "name": "Serum carotenoid concentrations", "type": "OTHER" } ], "intervention_types": [ "OTHER" ], "sponsor": "Baylor College of Medicine", "sponsor_class": "OTHER", "healthy_volunteers": true, "eligibility": { "minimum_age": "3 Months", "maximum_age": "24 Months", "sex": "ALL", "summary": "3 Months to 24 Months" }, "enrollment_count": 208, "start_date": "2023-06-26", "completion_date": "2028-11-30", "has_results": false, "last_update_posted_date": "2026-03-27", "last_synced_at": "2026-10-30T14:36:19.558Z", "location_count": 1, "location_summary": "Houston, Texas", "locations": [ { "city": "Houston", "state": "Texas" } ], "official_url": "https://clinicaltrials.gov/study/NCT05869760" }, { "nct_id": "NCT03148418", "title": "A Study in Participants Previously Enrolled in a Genentech- and/or F. Hoffmann-La Roche Ltd-Sponsored Atezolizumab Study (IMbrella A)", "overall_status": "ACTIVE_NOT_RECRUITING", "study_type": "INTERVENTIONAL", "phases": [ "PHASE3" ], "conditions": [ "Cancer" ], "interventions": [ { "name": "Atezolizumab", "type": "DRUG" }, { "name": "Bevacizumab", "type": "DRUG" } ], "intervention_types": [ "DRUG" ], "sponsor": "Hoffmann-La Roche", "sponsor_class": "INDUSTRY", "healthy_volunteers": false, "eligibility": { "minimum_age": null, "maximum_age": null, "sex": "ALL", "summary": "Not listed" }, "enrollment_count": 382, "start_date": "2017-09-20", "completion_date": "2026-11-30", "has_results": false, "last_update_posted_date": "2026-10-08", "last_synced_at": "2026-10-30T14:36:19.558Z", "location_count": 44, "location_summary": "Scottsdale, Arizona • Los Angeles, California • San Marcos, California + 36 more", "locations": [ { "city": "Scottsdale", "state": "Arizona" }, { "city": "Los Angeles", "state": "California" }, { "city": "Los Angeles", "state": "California" }, { "city": "San Marcos", "state": "California" }, { "city": "Aurora", "state": "Colorado" } ], "official_url": "https://clinicaltrials.gov/study/NCT03148418" }, { "nct_id": "NCT02188290", "title": "Transplant-Related Mortality in Patients Undergoing a Peripheral Blood Stem Cell Transplantation or an Umbilical Cord Blood Transplantation", "overall_status": "COMPLETED", "study_type": "OBSERVATIONAL", "phases": [], "conditions": [ "Acute Myeloid Leukemia", "Acute Lymphoblastic Leukemia", "Myelodysplastic Syndrome" ], "interventions": [], "intervention_types": [], "sponsor": "Kiadis Pharma", "sponsor_class": "INDUSTRY", "healthy_volunteers": false, "eligibility": { "minimum_age": "18 Years", "maximum_age": "65 Years", "sex": "ALL", "summary": "18 Years to 65 Years" }, "enrollment_count": 178, "start_date": "2014-09", "completion_date": "2015-06", "has_results": false, "last_update_posted_date": "2015-10-06", "last_synced_at": "2026-10-30T14:36:19.558Z", "location_count": 1, "location_summary": "Columbus, Ohio", "locations": [ { "city": "Columbus", "state": "Ohio" } ], "official_url": "https://clinicaltrials.gov/study/NCT02188290" }, { "nct_id": "NCT02478723", "title": "A Study Evaluating the Sonendo GentleWave™ System", "overall_status": "TERMINATED", "study_type": "OBSERVATIONAL", "phases": [], "conditions": [ "Root Canal" ], "interventions": [ { "name": "Sonendo GentleWave™ System", "type": "DEVICE" } ], "intervention_types": [ "DEVICE" ], "sponsor": "Sonendo, Inc.", "sponsor_class": "INDUSTRY", "healthy_volunteers": false, "eligibility": { "minimum_age": "18 Years", "maximum_age": null, "sex": "ALL", "summary": "18 Years and older" }, "enrollment_count": 20, "start_date": "2015-04", "completion_date": "2019-03-27", "has_results": false, "last_update_posted_date": "2019-04-04", "last_synced_at": "2026-10-30T14:36:19.558Z", "location_count": 1, "location_summary": "Laguna Hills, California", "locations": [ { "city": "Laguna Hills", "state": "California" } ], "official_url": "https://clinicaltrials.gov/study/NCT02478723" }, { "nct_id": "NCT02575196", "title": "Non Invasive Neuromonitoring After Cardiac Arrest", "overall_status": "COMPLETED", "study_type": "OBSERVATIONAL", "phases": [], "conditions": [ "Cardiac Arrest" ], "interventions": [ { "name": "Non-invasive cerebral flow monitoring", "type": "DEVICE" } ], "intervention_types": [ "DEVICE" ], "sponsor": "Icahn School of Medicine at Mount Sinai", "sponsor_class": "OTHER", "healthy_volunteers": false, "eligibility": { "minimum_age": "18 Years", "maximum_age": null, "sex": "ALL", "summary": "18 Years and older" }, "enrollment_count": 21, "start_date": "2015-10", "completion_date": "2016-03-21", "has_results": false, "last_update_posted_date": "2017-04-19", "last_synced_at": "2026-10-30T14:36:19.558Z", "location_count": 1, "location_summary": "New York, New York", "locations": [ { "city": "New York", "state": "New York" } ], "official_url": "https://clinicaltrials.gov/study/NCT02575196" }, { "nct_id": "NCT00001198", "title": "Evaluating Genetic Risk Factors for Childhood-Onset Schizophrenia", "overall_status": "TERMINATED", "study_type": "OBSERVATIONAL", "phases": [], "conditions": [ "Psychosis", "Schizophrenia", "Genetic Structure", "Childhood Onset Psychotic Disorders", "Schizoaffective Disorder" ], "interventions": [], "intervention_types": [], "sponsor": "National Institute of Mental Health (NIMH)", "sponsor_class": "NIH", "healthy_volunteers": true, "eligibility": { "minimum_age": "6 Years", "maximum_age": null, "sex": "ALL", "summary": "6 Years and older" }, "enrollment_count": 1556, "start_date": "1984-03-19", "completion_date": "2017-10-10", "has_results": false, "last_update_posted_date": "2017-10-12", "last_synced_at": "2026-10-30T14:36:19.558Z", "location_count": 1, "location_summary": "Bethesda, Maryland", "locations": [ { "city": "Bethesda", "state": "Maryland" } ], "official_url": "https://clinicaltrials.gov/study/NCT00001198" }, { "nct_id": "NCT03838900", "title": "The Loop Observational Study", "overall_status": "COMPLETED", "study_type": "OBSERVATIONAL", "phases": [], "conditions": [ "Diabetes Mellitus, Type 1" ], "interventions": [ { "name": "Loop", "type": "DEVICE" } ], "intervention_types": [ "DEVICE" ], "sponsor": "Jaeb Center for Health Research", "sponsor_class": "OTHER", "healthy_volunteers": false, "eligibility": { "minimum_age": null, "maximum_age": null, "sex": "ALL", "summary": "Not listed" }, "enrollment_count": 1212, "start_date": "2019-01-17", "completion_date": "2020-04-25", "has_results": false, "last_update_posted_date": "2020-08-14", "last_synced_at": "2026-10-30T14:36:19.558Z", "location_count": 1, "location_summary": "Tampa, Florida", "locations": [ { "city": "Tampa", "state": "Florida" } ], "official_url": "https://clinicaltrials.gov/study/NCT03838900" } ] }