Observational Clinical Trials

11 recruitingLast updated: June 18, 2026

There are 11 actively recruiting observational clinical trials across 5 countries. Studies span Not Applicable, Phase 4. Top locations include Beijing, Beijing Municipality, China, Berlin, State of Berlin, Germany, Bremen, Germany. Updated daily from ClinicalTrials.gov.


Observational Trials at a Glance

11 actively recruiting trials for observational are listed on ClinicalTrialsFinder across 6 cities in 5 countries. The largest study group is Not Applicable with 1 trial, with the heaviest enrollment activity in Beijing, Berlin, and Bremen. Lead sponsors running observational studies include Changchun GeneScience Pharmaceutical Co., Ltd., Jacobs University Bremen gGmbH, and Berlin Institute of Health @ Charité.

Browse observational trials by phase

Treatments under study

About Observational Clinical Trials

Looking for clinical trials for Observational? There are currently 1 studies actively recruiting participants. Clinical trials offer access to new treatments before they are widely available, and every approved therapy in use today was first tested through a clinical trial.

Below you can browse trials, sign up for alerts when new Observational trials open, and view eligibility criteria for each study. Each listing includes the study phase, locations, and enrollment details.

Frequently Asked Questions

Common questions about Observational clinical trials

A clinical trial is a carefully designed research study that tests new medical treatments, drugs, devices, or approaches in human volunteers. Every approved medication and treatment available today was proven safe and effective through clinical trials.

All clinical trials are reviewed and approved by Institutional Review Boards (IRBs) — independent committees that evaluate patient safety. Trials follow strict protocols, and your health is monitored closely throughout. You can withdraw at any time.

Not necessarily. Many trials compare the new treatment against the current standard of care, meaning all participants receive active treatment. When placebos are used, they are typically combined with standard treatment, not given alone. The trial description will always specify the design.

Under the Affordable Care Act, most private insurers are required to cover routine patient care costs during a clinical trial. The sponsor typically covers the investigational treatment itself. Medicare also covers routine costs for qualifying trials.

Yes. Participation is completely voluntary. You can withdraw at any time, for any reason, without it affecting your access to standard medical care.

Each trial has specific eligibility criteria — including age, diagnosis, disease stage, prior treatments, and general health. Browse the trials listed above and check their eligibility sections. You can also contact the trial site directly to discuss your situation.

Showing 111 of 11 trials

Recruiting

Phenotypic Age Acceleration (PhenoAgeAccel) for Joint Prediction of Disease Risk, Mortality Risk, Life Expectancy, and Disease-Free Healthspan in Major Chronic Diseases

Phenotypic Age AccelerationBiological Aging MarkerMortality Risk Prediction+5 more
Second Affiliated Hospital of Nanchang University2,000,000 enrolled1 locationNCT07595094
Recruiting

Health Surveillance at Constructor University Bremen (CUB) and Among HAW-Hamburg Employees

AnxietyPsychological StressHealth Behavior+12 more
Jacobs University Bremen gGmbH363 enrolled2 locationsNCT06899308
Recruiting

Validation of RCC Predicting Model With Emulated-target Trial

Prognostic Cancer ModelRenal Cell Carcinoma (RCC)Prognosis+4 more
Peking University Third Hospital4,700 enrolled1 locationNCT07117227
Recruiting

Project VERANDA: Requirement Analysis Survey

Observational Study
Berlin Institute of Health @ Charité100 enrolled1 locationNCT07424872
Recruiting

Iruplinalkib in ALK-Positive Advanced Lung Adenocarcinoma After Lorlatinib

Non-small Cell Lung CancerReal World StudyObservational Study+3 more
Peking University Shenzhen Hospital20 enrolled1 locationNCT07374614
Recruiting
Phase 4

A Prospective Real-World Observational Study of Nanocrystalline Megestrol Acetate in Patients With Cancer Cachexia

Clinical Characteristics and Treatment Outcomes of Malignant Tumor CachexiaMulticenter Observational Study
Changchun GeneScience Pharmaceutical Co., Ltd.495 enrolled1 locationNCT07243379
Recruiting
Not Applicable

Assessing the Feasibility and Acceptability of Watching Queen of Katwe as a Role Model Intervention Among Adolescents in High Schools in Kenya

Observational Study
Shamiri Institute250 enrolled2 locationsNCT07072741
Recruiting

The Natural History of Sialidosis Type I

Observational Study
National Taiwan University Hospital30 enrolled1 locationNCT06316752
Recruiting

Fertility: Infection and Inflammation

Observational Study of IVF Patients
Medical University of Graz800 enrolled1 locationNCT06826820
Recruiting

Clinical Study on the Effect of CPAP on AF Recurrence After Catheter Ablation in Patients with AF and OSA

Atrial FibrillationObstructive Sleep ApneaRecurrence+2 more
Second Affiliated Hospital of Soochow University224 enrolled1 locationNCT06542263
Recruiting

Prospective Observational Trial to Evaluate Quality of Life After Stereotactic Ablative Radiation Therapy in Patients With Hepatocellular Carcinoma

Quality of LifeHepatocellular CancerStereotactic Body Radiation Therapy+1 more
Ludwig-Maximilians - University of Munich100 enrolled1 locationNCT03253536