115 completed, 59 unknown, 38 recruiting, 15 not yet recruiting. .
Follow Observational Study: new trials by email Literature Review of Observational Study trials Research Report on Observational Study
Tick up to 5 trials to compare them side by side (eligibility, arms, endpoints, adverse events) in a Literature Matrix.
| Trial | Phase | Status | Sponsor | Enrollment | Start | Updated |
|---|---|---|---|---|---|---|
| Metabolites in Blood and Breath in Metabolic Conditions Observational Study - Inborn Errors of Metabolism, Epilepsy (Treatment Refractory) | Not yet recruiting | University Children's Hospital, Zurich | 100 | 2026-10-01 | 2026-08-12 | |
| Prospective Registry of Exposure to Gepotidacin (PREG) None (Observational study) - Sexually Transmitted Diseases | Not yet recruiting | GlaxoSmithKline | 614 | 2026-09-30 | 2026-09-30 | |
| REFOCUS-HTN US-WEST: A Data Infrastructure to Characterize Individuals With Hypertension observational study - Hypertension, Aldosterone Disorder | Recruiting | Kaiser Permanente | 500 | 2026-08-20 | 2026-10-05 | |
| Identification of Lesion Characteristics in Coronary Plaques Using Multimodality Intravascular Imaging and Novel Photon-counting CT in Stable Angina observational study - Coronary Artery Disease (CAD), Stable Angina Pectoris | Recruiting | Queen Mary University of London | 70 | 2026-08-19 | 2026-10-07 | |
| QUARTZ: Comparative Effectiveness of Switching From Albuterol to Albuterol/Budesonide Versus Adding Low-dose ICS or LTRA to Albuterol None (observational study) - Asthma | Recruiting | AstraZeneca | 8000 | 2026-08-03 | 2026-09-18 | |
| Appropriateness of Hemostatic Agent Use in Cardiovascular Surgery (HAEMOVAX) observational study - Hemostasis, Perioperative Bleeding | Recruiting | University of Milan | 15 | 2026-07-01 | 2026-07-13 | |
| Cohort Study of Metabolic Disease and Hypertension Observational Study - Type 2 Diabetes Mellitus (T2DM), Hypertension (HTN) | Not yet recruiting | Coordinación de Investigación en Salud, Mexico | 2500 | 2026-06-01 | 2026-05-11 | |
| Smoking, Pain Threshold, and Hand Strength in Women observational study - Smoking ( Cigarette), Women | Completed | Karabuk University | 132 | 2026-05-25 | 2026-06-12 | |
| CALLY Index, Frailty and SOFA-2 for Mortality Prediction in Geriatric ICU Patients observational study - Critical Illness, Frailty | Completed | Istanbul University - Cerrahpasa | 138 | 2026-04-30 | 2026-07-09 | |
| Sepsis Induced Myocardial Injury in Critically Ill Children observational study - Sepsis Induced Cardiomyopathy, Sepsis Induced Myocardial Dysfunction | Not yet recruiting | Assiut University | 84 | 2026-04-01 | 2026-03-27 | |
| Serum COMP and MMP-3 in Knee Osteoarthritis Observational Study - Knee Osteoarthritis | Not yet recruiting | Kanuni Sultan Suleyman Training and Research Hospital | 60 | 2026-04-01 | 2026-04-14 | |
| Impact of Metabolic Disorders on cACLD Outcomes Observational Study - Compensated Advanced Chronic Liver Disease | Not yet recruiting | The Second Affiliated Hospital of Chongqing Medical University | 4307 | 2026-04-01 | 2026-04-16 | |
| Long-Term Follow Up of VOY-101 Non-nAMD Extension Study observational study, VOY-101 - Age-Related Macular Degeneration (AMD), Non-Neovascular Age-Related Macular Degeneration | Enrolling by invitation | Perceive Biotherapeutics, Inc. | 88 | 2026-03-03 | 2026-06-22 | |
| BREVOC Study: Exhaled VOCs for High-Risk Chest Pain in the ED observational study - Acute Coronary Syndrome, High-Risk Chest Pain | Not yet recruiting | Qilu Hospital of Shandong University | 6000 | 2026-03-01 | 2026-01-30 | |
| Intestinal Colonization With Carbapenem Resistant Enterobacteriaceae Among ICU Patients at Assiut University Hospital Observational study - Rate of Carbapenemase Intestinal Carrier Inside ICU | Not yet recruiting | Israa Ahmed abdelhalim | 120 | 2026-02-01 | 2025-12-01 | |
| Correlation Between the Degree of Middle Ear Pressure and the Eustachian Tube Dimensions : Radiological Study Observational study - the Degree of Middle Ear Pressure and the Eustachian Tube Dimensions | Not yet recruiting | Assiut University | 50 | 2026-02-01 | 2026-01-15 | |
| Integrated Clinical-molecular Risk Stratification to Early Recurrence in Colorectal Liver Metastases gene sequencing, observational study - Colorectal Liver Metastases | Not yet recruiting | Fudan University | 200 | 2026-01-31 | 2026-02-05 | |
| Wound Healing Following Extraction and Ridge Preservation in Smokers and Non-smokers observational study - Smoking, Cigarette, Alveolar Bone Grafting | Not yet recruiting | Marquette University | 12 | 2026-01-25 | 2026-01-28 | |
| Preoperative Neutrophil-to-Lymphocyte Ratio and Early Postoperative Pain After Septorhinoplasty Observational Study - Neutrophil-to-Lymphocyte Ratio, Septorhinoplasty | Not yet recruiting | Istinye University | 110 | 2026-01-01 | 2026-01-20 | |
| Treatment and Outcomes of DLBCL After Progression on Polatuzumab Vedotin-based Combination Therapy observational study - Diffuse Large B Cell Lymphoma (DLBCL) | Not yet recruiting | Peking Union Medical College Hospital | 200 | 2025-12-30 | 2025-12-30 |
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Arthritis, Rheumatoid (10) · Obesity (10) · Stroke (8) · COVID-19 (7) · Heart Failure (6) · Pancreatic Neoplasms (5) · Stomach Neoplasms (5) · Asthma (4) · Breast Neoplasms (4) · Cardiovascular Diseases (4) · Depression (4) · Hypertension (4) · Parkinson Disease (4) · Sepsis (4) · Acute Kidney Injury (3)
AstraZeneca (13) · Latin American Cooperative Oncology Group (5) · BioFire Diagnostics, LLC (4) · Assistance Publique - Hôpitaux de Paris (3) · Federal University of Minas Gerais (3) · Fudan University (3) · GlaxoSmithKline (3) · National Taiwan University Hospital (3) · Peking Union Medical College Hospital (3) · Sanjay Gandhi Postgraduate Institute of Medical Sciences (3) · University of Texas Southwestern Medical Center (3) · Assiut University (2) · Central Institute of Mental Health, Mannheim (2) · China National Center for Cardiovascular Diseases (2) · Duke University (2)
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Harlan M Krumholz, MD, SM (2) · Jing Li, MD, PhD (2) · Madhukar H Trivedi, MD (2) · Maria C Tartaglia, M.D. (2) · Qiaofei Liu (2) · Rubina M Mandlik, PhD (2) · Vrisiis Kofina, DDS, MS (2) · Adam Boxer, MD, PhD (1) · Adam L Boxer, MD, PhD (1) · Agnes van der Heide, PhD (1)
PMID 10329105, PMID 11535886, PMID 11680441, PMID 11996444, PMID 13105270, PMID 13126521, PMID 15293766, PMID 16096555, PMID 16390886, PMID 16994214, PMID 16994980, PMID 17074942, PMID 17184516, PMID 17629661, PMID 18178467, PMID 20472572, PMID 20860678, PMID 21689676, PMID 21764766, PMID 21789167, PMID 21929768, PMID 22136841, PMID 22155686, PMID 23419824, PMID 23561326, PMID 25728334, PMID 25918669, PMID 26339020, PMID 26694050, PMID 26811272, PMID 27064414, PMID 27125753, PMID 27294995, PMID 27644734, PMID 27914247, PMID 28122524, PMID 28233803, PMID 28276060, PMID 28522655, PMID 28733343, PMID 29168209, PMID 29218814, PMID 29224945, PMID 29426806, PMID 29748344, PMID 30132843, PMID 30616617, PMID 30782925, PMID 30868112, PMID 31074004
2016 (1), K23GM115690 (1), R01AG031278 (1), R01AG038791 (1), R01HD071779 (1), R01HL143788 (1)