Clinical trials
Observational Study clinical trials
Below are recruiting observational study clinical trials, each written for real people, not researchers. We’re tracking 824 recruiting studies, each written for real people, not researchers, below.
Recruiting studies
- NCT06378632Recruiting
Heart failure monitoring app study
This study tests a smartphone app that listens to your voice to detect early signs of heart failure worsening. It aims to help you avoid hospital stays by catching problems sooner.
Fairhope, AlabamaAges 22 years+ - 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 - 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 - 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+ - 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+ - 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 - NCT05903261Recruiting
Study of targeted radiation for rare cancers with limited spread
This observational study follows people with rare solid tumors and a limited number of metastases treated with a focused radiation technique (SBRT). Doctors want to see outcomes after using a strong, curative-intent radiation dose to all active spots.
Rozzano, MilanAges 18 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 - NCT06979024Enrolling by invitation
Observational study of myotonic dystrophy type 1
This study follows people with myotonic dystrophy type 1 over time to learn more about the condition. It is for people of any age who have genetic confirmation of DM1, whether or not they have symptoms.
Fuzhou, FujianAges 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+ - 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 - NCT06839547Recruiting
Testing a new drug with radiation for advanced breast cancer brain tumors
This study looks at how well a new anti-tumor drug works when given along with radiation therapy for people whose advanced breast cancer has spread to the brain. It may help the radiation work better and control the cancer longer.
BeijingAges 18 years+ - NCT05486650Recruiting
Study of focused radiation after PD-1 treatment helped non-lung cancer
This observational study looks at how stereotactic (high-precision) radiation works for advanced non-small cell lung cancer that is stable after PD-1 antibody treatment (sometimes with chemotherapy). It may help doctors better understand which patients benefit from this next treatment step and what side effects to expect.
Chongqing, Chongqing MunicipalityAges 18–75 - NCT06729502Recruiting
Frailty Scale for Older Adults in the ICU
This study uses a simple picture-based scale to measure frailty in older adults (60+) who were admitted to the intensive care unit. It aims to better understand how frailty affects recovery in this setting.
Petah TikvaAges 60 years+ - NCT06776861Recruiting
Radiation plus immunotherapy for advanced breast cancer
This study looks at combining radiation therapy with immunotherapy for advanced breast cancer that has spread or cannot be surgically removed. The goal is to see if adding radiation after treatment helps improve outcomes.
Beijing, Beijing MunicipalityAges 18 years+ - NCT04424992Recruiting
Observing hospitalized adults with COVID-19 lung infection
This study follows adults who are hospitalized with COVID-19 in the lungs. The goal is to better understand how COVID-19 behaves in the hospital over time.
MonzaAges 18 years+ - NCT06541652Recruiting
Study of rare liver cancers in France
This study looks at people with rare types of liver cancer to learn more about the disease. If you have one of these rare liver cancers, your information could help doctors understand these cancers better.
AmiensAges 18 years+ - NCT05942807Recruiting
Study of biliary tract cancer and care experiences
This is an observational study for adults with biliary tract cancer that looks at existing clinical information. It may help doctors understand the disease better and improve future care, without using a new treatment in a required way.
Roma, RomeAges 18 years+ - NCT06202027Recruiting
CRYSVITA safety and effectiveness in Korean patients
This study looks at the safety and effectiveness of CRYSVITA (burosumab) in real-world use among patients in South Korea. If you are already prescribed CRYSVITA for X-linked hypophosphatemia, your doctor may ask you to join this survey to help track how well it works and any side effects.
Wŏnju, Gangwon-doAges 1 day+ - NCT06564974Recruiting
Long-term safety study of Agamree for Duchenne muscular dystrophy
This study watches boys with Duchenne muscular dystrophy who are already taking Agamree (vamorolone) to see how safe it is over a long period. It helps doctors understand the medicine's effects over time.
Phoenix, ArizonaAges 2 years+ - NCT06459986Recruiting
How long does spinal anesthesia last? A study in orthopedic surgery
This study tracks how long spinal anesthesia lasts during planned orthopedic surgeries. By collecting real-world data, doctors hope to improve timing and care for patients having this type of anesthesia.
HillerødAges 18–100
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Common questions
- Are there clinical trials for observational study?
- Yes. Clin2 currently lists 824 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.