Clinical trials
Observational Study clinical trials
Below are recruiting observational study clinical trials, each written for real people, not researchers. We’re tracking 841 recruiting studies, each written for real people, not researchers, below.
Recruiting studies
- NCT06548269Recruiting
Assessing stroke recovery in patients with atrial fibrillation
This study watches how people recover from a recent stroke caused by a heart rhythm problem called atrial fibrillation (or AFib). It aims to find better ways to predict recovery and guide future care.
Jinan, ShandongAges 18 years+ - NCT06562140Recruiting
Study of health in colorectal and anal cancer patients
This study looks at the overall health and well-being of people with colorectal or anal cancer. It may help doctors better understand how to support patients like you.
Pécs, BaranyaAges 18–80 - NCT06570980Recruiting
Comparing two diabetes drugs taken with metformin
This study looks at two common diabetes pills (sulfonylureas and DPP4 inhibitors) when used together with metformin. It aims to find out which combination is more cost-effective for treating type 2 diabetes.
DhakaAges 18 years+ - NCT06575439Recruiting
Study of lung cancer in people who have never smoked
This study looks at why some people who have never smoked develop lung cancer. Researchers will follow participants to learn about predictors and outcomes, with the goal of improving care for non-smokers with lung cancer.
LondonAges 18 years+ - NCT06590142Recruiting
Studying bowel tissue for future Hirschsprung's treatments
This trial collects leftover intestine tissue from children having bowel surgery to help develop future treatments using a child's own cells. It aims to find better ways to repair the bowel without needing donor tissue.
Liverpool, MerseysideAges birth–15 years - NCT07109375Recruiting
Long-term study of pegunigalsidase alfa for Fabry disease
This study observes how well the medication pegunigalsidase alfa works over a long period in people with Fabry disease. It helps doctors learn more about managing the condition in everyday life.
ArezzoAges 18 years+ - NCT06621459Recruiting
Study of abemaciclib safety for breast cancer patients
This study looks at real-world safety and side effect management of abemaciclib combined with hormone therapy for patients with RH+, HER2- breast cancer. It aims to understand how well patients tolerate treatment outside of clinical trials.
BrestAges Any age - NCT06631261Recruiting
Stepper test for lung and heart health in bronchiectasis
This study compares how the heart and lungs respond to a 6-minute stepper exercise in people with bronchiectasis versus healthy adults. It aims to better understand the physical impact of bronchiectasis on daily activities.
AnkaraAges 18 years+ - NCT06637657Recruiting
Optimizing long-term heart disease prevention
This trial tests different ways to manage and reduce the risk of future heart problems in people who have already had a heart attack or a procedure to open blocked heart arteries. The goal is to find the best long-term treatment plan to keep you healthy.
AmsterdamAges 18 years+ - NCT06641726Recruiting
Global database linking genetics and health records for mental illness
This trial is building a research database that combines genetic information and long-term health data to improve personalized treatment for serious mental illness. You may be eligible if you have been diagnosed or treated for depression, bipolar disorder, schizophrenia, or dementia.
Oxford, OxfordAges 18–110 - NCT06662747Recruiting
Vaginal microbiome study for African women
This study is looking at the bacteria living in the vagina to understand what makes a healthy microbiome in African women. You will provide self-collected swabs and attend visits to help researchers learn more about vaginal health.
Kisumu, Kisumu CountyAges 18–40 - NCT06663358Recruiting
Safety and effectiveness of Elfabrio in Fabry disease patients
This study is for people with Fabry disease who are taking or planning to take the medication Elfabrio (pegunigalsidase alfa). It will look at how safe and effective the treatment is in real-world use.
Birmingham, AlabamaAges 18 years+ - NCT06676137Recruiting
Coronary microvascular disease study in China
This study looks at chest pain caused by tiny blood vessels in the heart that don't show up on standard angiograms. It aims to understand this condition better to help find better care.
ZhengzhouAges 18–85 - NCT06695897Recruiting
Long-term real-world study of Dupilumab for eosinophilic esophagitis
This study looks at how well Dupilumab works over time in people aged 12 and older with eosinophilic esophagitis (EoE) whose symptoms are not well controlled by standard treatments. It aims to understand the medicine's effects in everyday medical practice.
Dachau, BavariaAges 12 years+ - NCT07330505Recruiting
Checking blood pressure monitor setup in the ICU
This study looks at how doctors set up the blood pressure monitors in the ICU. It checks if the position of the monitor affects the readings, and it may help improve care for patients on breathing machines and blood pressure support.
GothenburgAges 18 years+ - NCT06718010Recruiting
Blood markers and breast cancer treatment results
This study looks at how age-related changes in your blood might affect how well your breast cancer treatment works. It includes people with hormone receptor-positive, HER2-negative breast cancer that has not spread to distant organs.
Shanghai, Shanghai MunicipalityAges 18 years+ - NCT06720532Recruiting
Kidney function in men with prostate cancer getting a new targeted radiation therapy
This study looks at how a targeted radiation therapy called 177Lu-PSMA affects kidney function in men with a type of advanced prostate cancer. It aims to understand risk factors to help guide safe treatment.
MunichAges 18 years+ - NCT06720870Recruiting
Siltuximab for Castleman's disease: a real-world study
This trial is looking back at the medical records of people with a rare condition called Castleman's disease to see how well the drug Siltuximab worked for them in everyday hospital care, not in a research setting. The goal is to learn more about how safe and effective the drug can be for patients in real life.
Bologna, BolognaAges 18 years+ - NCT06721624Recruiting
Natural approaches for IBS: a research study
This study observes how naturopathic treatments help people with Irritable Bowel Syndrome (IBS) or IBS-like symptoms. It aims to understand what works in real-world care.
Portland, OregonAges 18 years+ - NCT06724159Recruiting
Study of funded drugs for genitourinary cancers
This study looks at how well newer funded cancer drugs work for people with cancers of the urinary or reproductive systems, such as bladder, prostate, or kidney cancer. Researchers want to learn about real-world outcomes based on routine care in hospitals across Spain.
Albacete, AlbaceteAges 18 years+ - NCT06734156Recruiting
Gut microbiome study in colorectal cancer patients
This study looks at how bacteria and other microbes in your gut are linked to colorectal cancer risk and outcomes. By collecting stool samples from people newly diagnosed with colorectal cancer, researchers hope to find patterns that could improve understanding and future treatments.
Lisbon, Lisbon DistrictAges 40–74 - NCT06741293Recruiting
Improving colorectal cancer early screening with stool tests
This study looks for markers in stool (poop) to detect colorectal cancer early. If you are between 40 and 74, live in the Lisbon area, and don't have certain digestive or cancer conditions, you may help improve screening by providing a stool sample.
Lisbon, Lisbon DistrictAges 40–74 - NCT06751082Recruiting
Sotatercept for pulmonary hypertension study
This study looks at how well the drug Sotatercept works for people with pulmonary hypertension (high blood pressure in the lungs) in a real-world clinic setting. If you are already taking Sotatercept, you may be able to join.
Rochester, MinnesotaAges 18 years+ - 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
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Common questions
- Are there clinical trials for observational study?
- Yes. Clin2 currently lists 841 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.