Clinical trials
Observational Study clinical trials
Below are recruiting observational study clinical trials, each written for real people, not researchers. We’re tracking 839 recruiting studies, each written for real people, not researchers, below.
Recruiting studies
- NCT06866912Recruiting
Observational study of amyloidosis and TTR gene carriers
This study is observing people with amyloidosis or those who carry a specific gene mutation (transthyretin) to learn more about the condition. It does not test any new treatment, but may help researchers understand how the disease affects people.
BolognaAges 18–99 - NCT06868823Recruiting
Blood thinners during lung transplant bypass
This study compares two different blood thinners (UFH and LMWH) used during heart-lung bypass (ECMO) for double lung transplant patients. The goal is to see which one works better and is safer.
Prague, Czech RepublicAges 18 years+ - NCT06902545Recruiting
Safety study of VYLOY for stomach or GEJ cancer in South Korea
This study monitors the safety of VYLOY (a cancer medicine) given to people in South Korea with stomach or gastroesophageal junction cancer. It helps doctors learn more about real-world side effects and how well patients do on treatment.
Goyang-si, Gyeonggi-doAges Any age - NCT06918262Recruiting
MRD-guided local therapy for oligometastatic breast cancer
This study is looking at a test called MRD (minimal residual disease) to see if it can guide decisions about local treatments (like surgery or radiation) for people with breast cancer that has spread to a few spots. It may help doctors know when to use these treatments and when to wait.
Changchun, JilinAges Any age - NCT06962995Recruiting
Multi-cancer detection test study at Mayo Clinic
This study will collect blood samples from people who have had or are scheduled to have a multi-cancer detection test. Researchers want to learn more about how well these tests work and how the results affect follow-up care.
Scottsdale, ArizonaAges 21 years+ - NCT07133958Recruiting
Testing NAIC for advanced mouth and throat cancer
This study looks at how well NAIC treatment helps shrink advanced mouth or throat cancer. It aims to find patterns in how tumors respond to treatment.
Guangzhou, GuangdongAges 18–80 - NCT07215754Recruiting
Real-world study of anifrolumab for active lupus
This study tracks how well anifrolumab works and how safe it is for people with active lupus. It's a real-world look at the drug's effects, so no additional treatments or tests are required beyond what your doctor already prescribes.
PisaAges 18 years+ - NCT07235592Recruiting
Preserflo MicroShunt study for open-angle glaucoma
This trial is testing a small device called the PRESERFLO MicroShunt to lower eye pressure in people with open-angle glaucoma. It may be an option if your eye pressure stays high even with maximum eye drops.
ViennaAges 18–85 - NCT07237451Recruiting
Heart and kidney study of SGLT2 inhibitors
This study looks at whether a type of diabetes medicine called SGLT2 inhibitors (also known as flozins) can help protect the heart and kidneys in people with both heart failure with preserved pumping function and moderate chronic kidney disease, with or without diabetes.
IașiAges 18 years+ - NCT07242248Recruiting
Real-world study of guselkumab for Crohn's and colitis
This study looks at how well guselkumab works in real life for people with moderate-to-severe Crohn's disease or ulcerative colitis. It tracks patients in the UK who start guselkumab as part of their normal care.
HarrowAges 18 years+ - NCT07243873Recruiting
Improving lung cancer diagnosis with synthetic PET scans
This study uses a computer-generated PET scan from your CT scan to help doctors diagnose and plan treatment for non-small cell lung cancer more precisely. It is observational, meaning no new treatments are given—just extra imaging analysis.
Zunyi, GuizhouAges 18–85 - NCT07253974Recruiting
Atrial Fibrillation Stroke Recovery Study
This study follows people who had a stroke linked to atrial fibrillation (an irregular heartbeat) and are in a rehabilitation program. Researchers want to see how recovery goes and what helps patients improve.
BarcelonaAges 18–99 - NCT07287241Recruiting
Heart health study for people with osteogenesis imperfecta
This study looks at heart structure and function in children and adults with osteogenesis imperfecta (OI), a condition that affects bones. Researchers want to understand how OI may impact the heart.
Bologna, Emilia-RomagnaAges 5–80 - NCT07292857Recruiting
Respiratory infection risk in postmenopausal women on HRT or not
This study looks at how the risk of respiratory infections (like colds or flu) may differ in postmenopausal women who use hormone replacement therapy (HRT) and those who do not. You will wear a smartwatch for six months and track your health through a smartphone app.
BernAges 40–60 - NCT07312227Recruiting
Pregnancy at high altitude study
This study follows pregnant women living at high altitude in Bolivia to understand how pregnancy differs from those at sea level. It may help improve care for mothers and babies in high-altitude regions.
Boston, MassachusettsAges 18–45 - NCT07312708Recruiting
Protein dosing in ICU patients: weight vs. muscle mass
This trial compares two methods for calculating protein doses in critically ill patients: using actual body weight versus fat-free mass. It aims to find which approach is better for recovery in the ICU.
EdeAges 18 years+ - NCT02936791Recruiting
Study of early inherited kidney cysts and healthy volunteers
This observational study follows people early in autosomal dominant polycystic kidney disease (ADPKD) and also some healthy volunteers to learn how the kidneys work over time. It may help researchers understand early changes, which could guide future treatments.
Chicago, IllinoisAges 4–35 - NCT07419997Recruiting
Observational study on clot-busting drugs beyond the usual window
This study looks at patients who received a clot-busting drug (intravenous thrombolysis) for their stroke 4.5 to 24 hours after symptoms started. It aims to see how well this works and what happens to them, using data that has already been collected.
BeijingAges 18 years+ - NCT07432932Recruiting
Personalized treatment before surgery for high-risk sarcoma
This trial tests a precision medicine approach by giving targeted therapy before surgery for high-risk soft tissue sarcoma. The goal is to see if matching treatment to your tumor's type can improve outcomes.
LondonAges 18 years+ - NCT07448740Recruiting
Stepwise milk protein introduction after failed challenge
This study looks at a gradual method of introducing heated milk proteins to children who previously had a reaction to unheated cow's milk. It aims to help build tolerance over time.
BonheidenAges 1–18 - NCT07512518Recruiting
Study of Long-Term Viral Brain Infections
This study follows patients with chronic viral infections affecting the brain and spinal cord. Researchers will collect spinal fluid samples and track your health over one year to better understand these infections and improve care.
Beijing, Beijing MunicipalityAges 14 years+ - NCT07517458Recruiting
Understanding anxiety before cancer surgery in hospitalized patients
This study looks at how anxious cancer patients feel before surgery and tests a new way to measure that anxiety. It's observational—meaning researchers watch and listen rather than give treatments—to help doctors better support patients emotionally before procedures.
Aviano, PordenoneAges 18 years+ - NCT07563205Recruiting
Study of Chemotherapy and Amivantamab for Advanced Lung Cancer
This study follows patients with advanced lung cancer (a type called non-small cell lung cancer) who are receiving a combination of chemotherapy and a drug called amivantamab. Researchers want to understand how well this treatment works and track your health outcomes over time.
Aix-en-ProvenceAges 18 years+ - NCT07615712Recruiting
Tracking psoriasis treatment response with a new medication
This study follows people starting a new advanced psoriasis treatment to see how well it works over 16 weeks. You'll have three office visits with your dermatologist, and researchers will track your skin improvement to help understand which treatments work best for different patients.
Waltham, MassachusettsAges 18 years+
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Common questions
- Are there clinical trials for observational study?
- Yes. Clin2 currently lists 839 recruiting observational study studies from the U.S. registry, each rewritten for real people, not researchers, so you can see what it’s testing and who it’s for.
- How do I know if I qualify for a observational study trial?
- Each study lists its eligibility criteria — rules about age, diagnosis, and prior treatments. On every Clin2 trial page we explain these in words written for real people and offer a short, optional pre-screen for a fit read. The study team makes the final decision.
- Does it cost anything to join a observational study trial?
- Using Clin2 is always free. Many trials cover the cost of the study treatment and related visits; some reimburse travel. The study team explains exactly what’s covered before you decide.
Related conditions
Clin2 helps you find and understand clinical trials and does not provide medical advice. Study data comes from ClinicalTrials.gov. Talk with your doctor about whether a specific trial is right for you.