Clinical trials
Observational Study clinical trials
Below are recruiting observational study clinical trials, each written for real people, not researchers. We’re tracking 846 recruiting studies, each written for real people, not researchers, below.
Recruiting studies
- NCT06309836Recruiting
Study of advanced basal cell carcinoma in patients
This study looks at how people with advanced basal cell carcinoma (a type of skin cancer that is hard to treat or has spread) are cared for and what happens over time. It does not test any new treatments, but helps doctors learn more about the disease.
Roma, ITAAges 18 years+ - NCT06315556Recruiting
Study of Eylea for preterm babies with retinopathy of prematurity in the UK
This study collects information on how the medicine Eylea is given to preterm babies with retinopathy of prematurity (an eye problem in premature infants) using a special dosing device. The goal is to see how the treatment works in everyday hospital care.
Multiple LocationsAges Up to 1 year - NCT06334029Recruiting
Observing brain connections in epilepsy
This study is observing how the brain's connections and activity work in people with epilepsy. It uses MRI scans and EEG recordings to learn more about the condition, which may help improve future treatments.
Conegliano, TrevisoAges 6–65 - NCT06339255Recruiting
Observational study on CAR-T therapy for lymphoma
This study observes patients with certain lymphomas who are already eligible for standard CAR-T cell therapy in Italy. It aims to gather real-world information about how these treatments work.
MilanAges 18 years+ - NCT06339749Recruiting
Pregnancy outcomes in normal vs stage 1 high blood pressure
This study follows pregnant women with normal blood pressure or mild high blood pressure (stage 1) to compare pregnancy outcomes. It helps doctors understand how slightly elevated blood pressure may affect pregnancy.
Guangzhou, GuangdongAges 18–45 - NCT06375239Recruiting
Study of tests for tracking vision in retinal disease
This study will check if certain vision tests work well in people with retinal diseases like retinitis pigmentosa or Stargardt. Results will help design future trials.
Irvine, CaliforniaAges 18 years+ - NCT06376448Recruiting
Chronic cough study using a new questionnaire
This study aims to better understand different types of chronic cough by using a new questionnaire. If you have had a cough for at least 8 weeks and do not smoke, you may be able to help.
Cottingham, East YorkshiureAges 18 years+ - NCT06392581Recruiting
Fungal infection risk in Ph-Neg acute lymphoblastic leukemia
This study looks at how often patients with a type of leukemia called Philadelphia-negative acute lymphoblastic leukemia (ALL) get serious fungal infections. It will help doctors understand who is at higher risk and how to better protect patients during treatment.
BresciaAges 18 years+ - NCT06397755Recruiting
Study of patients with prostate biopsy or prostate removal surgery
This study looks at patients who have had a prostate biopsy or surgery to remove the prostate (radical prostatectomy). It aims to learn more about these procedures and how patients are doing.
MilanAges 18 years+ - NCT06402695Recruiting
Observational study on digestive and lung NETs
This study follows people with a type of tumor called a neuroendocrine tumor (NET) that started in the digestive system or lungs, to learn more about how the disease progresses and how it responds to treatment.
RomeAges 18 years+ - NCT06417502Recruiting
China pediatric rheumatic disease registry study
This study collects information from children with rheumatic and immune system diseases in China to better understand these conditions. By participating, you help researchers learn more about how to diagnose and treat these diseases.
Beijing, Beijing MunicipalityAges Up to 18 years - NCT06422871Recruiting
Observing HeRO Graft and Super HeRO in dialysis patients
This study is tracking how well the HeRO Graft and Super HeRO work for people on dialysis. If you already have one of these devices, joining helps doctors see how it performs over time.
Washington D.C., District of ColumbiaAges 18 years+ - NCT06429280Recruiting
Lazy Eye Treatment Registry for Luminopia Users
This registry collects information from people with lazy eye who have used Luminopia treatment for at least 12 weeks. It helps researchers learn more about how the treatment works in real life.
San Ramon, CaliforniaAges Any age - NCT06435000Recruiting
A study tracking Stargardt disease progression
This study follows people with Stargardt disease (a genetic eye condition that causes vision loss) over time. It aims to learn more about how the disease progresses and does not test any treatment.
San Diego, CaliforniaAges 12–65 - NCT06449742Recruiting
AI to find spine fractures on CT scans
This study is testing whether an artificial intelligence program can find broken bones in the spine (vertebral fractures) by looking at CT scans of the chest or abdomen. The goal is to see if AI can help doctors spot these fractures more easily, which could lead to earlier treatment.
Milan, ItalyAges 50 years+ - NCT06450327Recruiting
Resistant Hypertension: A Complex Condition Study
This study looks at why some people with hard-to-control high blood pressure (resistant hypertension) may also have other health problems. It aims to better understand the condition and how to help patients like you.
Votuporanga, São PauloAges 18–85 - NCT06506084Recruiting
Study of ropeginterferon alfa-2b for polycythemia vera
This study looks at how well a drug called ropeginterferon alfa-2b works for people with polycythemia vera. It aims to understand the drug's effects and safety when used as a first or later treatment option.
Bergamo, LombardyAges 18–100 - NCT06398626Recruiting
Observational study of etrasimod for ulcerative colitis
This study watches how well etrasimod works for adults with moderate to severe ulcerative colitis (UC). You must already be prescribed etrasimod by your doctor, and the study collects information through a web-based tool.
Mesa, ArizonaAges 18–64 - NCT07041606Recruiting
A study on advanced endometrial cancer in Russia
This study looks at genetic profiles and first treatments for advanced or aggressive endometrial cancer in women in Russia. It aims to understand how genetic information might guide better treatment choices.
ArkhangelskAges 18 years+ - NCT06492538Recruiting
Eye changes after glaucoma angle surgery
This study looks at how your eye's drainage angle changes after glaucoma surgery. It helps doctors understand what happens to the front part of your eye after procedures like laser or surgery to open the drainage area.
Guangzhou, GuangdongAges 30–85 - NCT06513273Recruiting
New treatments for AML in the real world
This study looks at how well new AML medicines work in everyday medical practice, outside of clinical trials. If you are starting a newer AML drug like gilteritinib, an IDH inhibitor, oral azacytidine, or others, you may be able to join.
San Giovanni RotondoAges 18 years+ - NCT06514976Recruiting
Study of Cytoflavin for ischemic stroke without clot treatment
This study is testing a medicine called Cytoflavin for people who have had a recent ischemic stroke but are not receiving clot-busting treatment. It aims to see if Cytoflavin helps improve recovery compared to other treatments or no treatment.
IvanovoAges 18 years+ - NCT06515964Recruiting
Long-term study of early esophageal cancer after endoscopic surgery
This study follows people who had early-stage esophageal cancer removed with a minimally invasive procedure (ESD) to see how they do over time. It aims to understand how often the cancer comes back or spreads, and what factors might affect that.
Shanghai, Shanghai MunicipalityAges 15–85 - NCT06516562Recruiting
Heart failure study in Vietnam: following patients' health over time
This study follows people with heart failure in Vietnam to understand their health and treatment over time. It does not test a new drug—just collects information to improve care.
Ho Chi Minh CityAges 18 years+
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Common questions
- Are there clinical trials for observational study?
- Yes. Clin2 currently lists 846 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.