Clinical trials
Observational Study clinical trials
Below are recruiting observational study clinical trials, each written for real people, not researchers. We’re tracking 843 recruiting studies, each written for real people, not researchers, below.
Recruiting studies
- NCT06758492Recruiting
Video vs direct laryngoscopy for surfactant in newborns
This study compares two ways of placing a thin tube into a newborn's windpipe to give surfactant—a medicine that helps their lungs work better. It will help doctors understand which method is safer and easier for babies needing this treatment.
RijekaAges birth–4 weeks - NCT06758648Recruiting
Eye blood vessels in Fabry disease
This study looks at the tiny blood vessels in the eyes of people with Fabry disease using a special camera. It may help doctors understand how the disease affects the eyes over time.
München, BavariaAges 18 years+ - NCT06758921Recruiting
Testing a catheter for leg artery blockages
This study tests a special catheter to open blocked arteries in the thigh, knee, or lower leg. It may help improve blood flow and reduce symptoms like leg pain or wounds.
GrazAges 18 years+ - NCT06763081Recruiting
SSRI side effects genetics study
This study looks at why some people have behavioral side effects when taking SSRI antidepressants like Prozac or Zoloft. It hopes to find a genetic reason to help doctors choose safer treatments in the future.
Winnipeg, ManitobaAges 6–24 - NCT06774690Recruiting
Arterial treatments for primary liver cancer
This study is watching how treatments that deliver medicine or tiny beads directly into the liver's blood supply work for people with liver cancer. If you have liver cancer and are getting or have gotten one of these treatments, this study wants to learn from your experience.
BolognaAges 18 years+ - NCT06775106Recruiting
Breath test to find lung infections faster
This study tests a new breath analysis method to quickly diagnose respiratory infections in ICU patients on breathing machines. If successful, it could lead to faster treatment for serious lung conditions.
Portland, OregonAges 18–120 - NCT06781437Recruiting
Lymphoma medical record review study
This study looks back at the medical records of people with lymphoma to learn more about the disease. It does not involve any new treatments or tests—just reviewing what happened in the past.
Bologna, BolognaAges 18 years+ - NCT06782217Recruiting
Safety study of bee and wasp venom allergy shots
This study monitors the safety of venom immunotherapy (allergy shots) for people with bee or wasp sting allergies. If you are starting this treatment, researchers will track how well you tolerate it over time.
Ferrol, A CoruñaAges 14 years+ - NCT06782789Recruiting
Study of Tafasitamab and Lenalidomide for aggressive B-cell lymphoma
This study looks back at medical records of people with relapsed or refractory diffuse large B-cell lymphoma who received a combination of two drugs (tafasitamab and lenalidomide) through a special access program. The goal is to learn how well the treatment worked and what side effects occurred.
Bologna, BolognaAges 18 years+ - NCT06784778Recruiting
Testing a blood test to predict immunotherapy response
This study is testing a new blood test called IOpener®-Melanoma to see if it can predict which patients with advanced melanoma will respond well to immunotherapy. The goal is to better match treatments to people who will benefit most.
Tübingen, Baden-WurttembergAges 18 years+ - NCT06791889Recruiting
Tracking bacteria in blood of ICU sepsis patients
This study uses a highly sensitive blood test (DdPCR) to quickly find and monitor harmful bacteria in ICU patients with sepsis, aiming to improve early detection and treatment.
WuhanAges 18 years+ - NCT06793709Recruiting
Study of Tasfygo for bile duct cancer with FGFR2 gene change
This study is watching people with a certain type of bile duct cancer that has a specific gene change (FGFR2 fusion). It looks at what happens when they take the drug Tasfygo after their cancer did not respond to chemotherapy.
TokyoAges Any age - NCT06805019Recruiting
Using CT scans to tell apart uterine sarcoma from fibroids
This study uses AI to look at CT scans from women with uterine sarcomas or fibroids to see if it can tell the difference between the two. The goal is to help doctors make a faster, more accurate diagnosis without needing surgery.
Bologna, BolognaAges 18–80 - NCT06805253Recruiting
Heart recovery after surgery for leaky aortic valve
This trial studies how well the heart's main pumping chamber (left ventricle) recovers after surgery to fix a leaky aortic valve. It is for people who also have a leaky mitral valve and an enlarged left ventricle, and who are having their first planned valve surgery.
MoscowAges 18 years+ - NCT06805721Recruiting
Observational study of endovascular treatment for brain and spine vessel conditions
This study follows patients of any age who are having a minimally invasive procedure (endovascular treatment) for blood vessel problems in the brain or spine. It looks at how patients do before and after the procedure, any complications, and what factors might predict a good outcome.
MilanAges Any age - NCT06807853Recruiting
Tracking movement with a smartwatch for spine arthritis
This study uses a smartwatch to track your movement and give you exercise advice. It aims to help people with axial spondyloarthritis stay active and manage their condition.
Bonn, North Rhine-WestphaliaAges 18 years+ - NCT06813586Recruiting
Study of cerebral palsy cases in Italy
This study observes children with cerebral palsy to better understand how common it is in Italy. It may help improve care and resources for people with CP.
Brindisi, ApuliaAges 4–18 - NCT06822829Recruiting
Study of lymphoma that returned as slow-growing type
This study looks at people whose diffuse large B-cell lymphoma came back as a slower-growing lymphoma. Doctors want to understand how and why this happens, using medical records from diagnosis through follow-up.
Reggio EmiliaAges 18 years+ - NCT06822894Recruiting
3-vessel ultrasound flow study in heart disease patients
This trial uses a special ultrasound to measure blood flow in three main heart arteries. It may help doctors better understand blockages and improve treatment planning.
BeijingAges 18 years+ - NCT06837454Recruiting
Study of eczema patients on systemic therapy
This study follows adults with moderate to severe eczema who are eligible for or already taking systemic (pill or injection) medicines. It does not test any new drug—it simply tracks how eczema is managed in real life, which may help improve future care.
Aix-en-ProvenceAges 18 years+ - NCT06838845Recruiting
A study on upadacitinib for Chinese adults with moderate to severe ulcerative colitis
This study is looking at how well the drug upadacitinib works and how safe it is for Chinese adults with moderate to severe ulcerative colitis. It is not a treatment trial, but will observe patients who are already taking upadacitinib as decided by their doctor.
Guangzhou, GuangdongAges 18 years+ - NCT06850220Recruiting
How sleep apnea affects thinking and empathy in kids
This study looks at how obstructive sleep apnea caused by enlarged tonsils or adenoids might affect a child's thinking skills and ability to understand others. It will help doctors learn if treating the sleep problem could also help with these skills.
Suzhou, JiangsuAges 3–12 - NCT06851702Recruiting
Tracking hormone side effects from immunotherapy in blood cancer
This study looks at people with certain types of blood cancer (lymphoma or leukemia) who are getting immunotherapy drugs called checkpoint inhibitors. Researchers want to learn how these drugs affect the body's hormone system, so doctors can better manage these side effects.
Bologna, BolognaAges 18 years+ - NCT06860438Recruiting
Using a new monitor to guide blood pressure meds in sepsis
This study looks at a special blood flow monitor (perfusion index) to see if it can help doctors decide when to give blood pressure raising medicines in patients with serious infections. It might help doctors better treat sepsis and septic shock.
CairoAges 18 years+
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Common questions
- Are there clinical trials for observational study?
- Yes. Clin2 currently lists 843 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.