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
- NCT05976763RecruitingPhase 3
Testing continuous vs. intermittent zanubrutinib for older adults with mantle cell lymphoma
This trial tests whether taking the targeted drug zanubrutinib continuously is better than taking it on a schedule with breaks for older adults with untreated mantle cell lymphoma. The goal is to find a treatment that works while reducing side effects.
Little Rock, ArkansasAges 60 years+ - NCT07055542Recruiting
New tool to predict thunderstorm asthma risk
This research study aims to create a simple tool to predict who is at risk for thunderstorm asthma. You will be asked to track your allergy symptoms and medications online during the spring, plus do a lung function test and give a blood sample.
Albury, New South WalesAges 18–70 - NCT06944418Recruiting
Eosinophil function in eosinophilic lung disease
This study looks at how a type of white blood cell (eosinophil) works differently in people with eosinophilic lung diseases. It may help doctors understand these conditions better and find new treatments.
Beijing, Beijing MunicipalityAges 18–90 - NCT07024680Recruiting
Sunitinib or sorafenib for papillary kidney cancer
This study looks at how well sunitinib or sorafenib work as a first treatment for a type of kidney cancer called papillary renal cell carcinoma (PRCC) that cannot be removed with surgery or has spread. It aims to understand real-world results in Chinese patients.
Shanghai, Shanghai MunicipalityAges 18 years+ - NCT07386015Recruiting
Study of freezing of gait in Parkinson's disease
This study looks at people with Parkinson's disease or similar conditions who have walking problems like freezing of gait (feet feeling stuck) or balance issues. Researchers want to learn more about what causes these symptoms and how they affect people over time.
Tianjin, Tianjin MunicipalityAges 30–85 - NCT06985524Enrolling by invitation
Chinese medicine formula for stomach fullness and discomfort
This trial tests a traditional Chinese medicine formula (Weipi Formula) for people with a feeling of fullness or discomfort in the upper stomach after eating, known as epigastric stuffiness or functional dyspepsia. It aims to see if the herbal mix can improve symptoms.
Nanchang, JiangxiAges 18–80 - NCT07120464Recruiting
Rabies vaccine study for people with weak immune systems or older age
This study tests how well a rabies vaccine works and how safe it is for people whose immune systems may be weaker, such as those with certain long-term illnesses, organ transplants, or age 60 and older. It compares them to healthy adults ages 18 to 59.
Shenzhen, GuangdongAges Any age - NCT07359651Recruiting
Study on factors linked to death in severe tissue infections
This study looks at what factors are linked to higher risk of death in patients hospitalized with a severe, flesh-eating infection called necrotizing soft tissue infection (NSTI). It aims to help doctors better identify and treat these dangerous infections.
CagliariAges 18 years+ - NCT07726875Enrolling by invitation
Orexin and confusion after surgery in older adults
This study looks at a brain chemical called orexin (which helps control wakefulness) in older adults after surgery. The goal is to see if orexin levels are linked to confusion or agitation that can happen when waking up from anesthesia. If you take part, your blood will be tested before and after surgery.
Shanghai, Shanghai MunicipalityAges 60 years+ - NCT06776848RecruitingPhase 1/Phase 2
Lithium for TBR1-related neurodevelopmental disorder
This trial tests whether taking lithium for 2 years can improve symptoms in people with a TBR1 gene change that causes neurodevelopmental challenges. It aims to see if lithium is safe and helpful for this condition.
DijonAges 6 years+ - NCT04417387Recruiting
Check genetics to improve heart disease risk prediction
This study looks at whether adding genetic information to a standard NHS Health Check can better predict a person’s risk of coronary artery disease (CAD). If you qualify, you may be asked to provide genetic information to help refine future risk estimates.
LeicesterAges 40–74 - NCT02355379RecruitingPhase 3
Chemo after colon cancer surgery for adults 70 and older
This Phase 3 trial studies whether giving chemotherapy after surgery helps people age 70+ with stage III colon cancer. You would be compared to another planned treatment approach, aiming to lower the chance of the cancer coming back.
Fort de France, GuadeloupeAges 75 years+ - NCT07304934Recruiting
New blood test model to check lymph node status in breast cancer
This study uses a blood test and imaging to predict whether breast cancer has spread to underarm lymph nodes, helping guide surgery. It may reduce unnecessary lymph node removal.
Hangzhou, ZhejiangAges 18 years+ - NCT04514445Recruiting
Study of genes in people with bicuspid aortic valve
This study looks for genetic (inherited) differences that may be linked to bicuspid aortic valve (BAV). It includes people with BAV and close family members to help understand why BAV happens and whether genes play a role.
KetteringAges 10–99 - NCT05894083RecruitingPhase 2
PET-Scan Tailored De-escalation for p16+ throat cancer
This trial tests a treatment plan that may lower (de-escalate) therapy intensity for certain p16+ or HPV-positive throat cancers. It uses PET scan results and tumor features to try to keep cancer control while reducing side effects.
Ann Arbor, MichiganAges 18 years+ - NCT07177742Recruiting
Study of protein in blood to predict liver spread of colon cancer
This study looks at whether a substance in your blood (called PRDX1, found in tiny particles called exosomes) can help predict if colon cancer will spread to the liver after surgery. It may help doctors understand who needs more monitoring or treatment.
Shanghai, Shanghai MunicipalityAges 1.6 years–6.7 years - NCT06883487Recruiting
Exploring HER2 testing in high-grade ovarian cancer
This study looks at how to best detect the HER2 protein in high-grade serous ovarian cancer. The goal is to improve treatment choices for people with this type of cancer.
Guangzhou, GuangdongAges 18–75 - NCT07350265Recruiting
Testing a lung surgery technique to reduce air leaks
This study tests a special ventilation method during lung surgery to see if it can predict air leaks after the procedure. If successful, it could help patients recover more smoothly after a lobectomy or segmentectomy.
AntonyAges 18 years+ - NCT02040714Enrolling by invitation
Study of current treatments for Perthes hip disease
This study follows children (and teens) with Legg-Calvé-Perthes disease to learn about how today’s treatments work in real life. It may help doctors choose the best next steps for your child’s hip health.
Birmingham, AlabamaAges 1–18 - NCT06770621Recruiting
Glucagon response study in new type 1 diabetes
This study looks at how the body makes glucagon (a hormone that raises blood sugar) in children and teens with new type 1 diabetes. It aims to understand why some people may have dangerous low blood sugars, so doctors can better prevent them in the future.
Brussels, Woluwe-saint-lambertAges 2–30 - NCT07034157Recruiting
Ultrasound screening and treatment for artery disease
This study tests if using ultrasound to screen for blocked neck and head arteries can improve treatment plans for people getting heart artery stents. It aims to find hidden blockages and tailor therapy to reduce stroke and other risks.
BeijingAges 18 years+ - NCT07373483Recruiting
Children's use of tablets and phones at home
This study watches how 3-5 year old children use tablets and smartphones at home. It aims to understand what devices they use and how parents' own habits or family background might affect screen time.
SheffieldAges 3–5 - NCT06401330RecruitingPhase 3
Wilms tumor treatment study for children and young adults
This study is testing different treatments for children and young adults with a type of kidney cancer called Wilms tumor. The treatment you get depends on certain risk factors, like tumor stage and lab results. The goal is to give the right amount of treatment for each person's situation.
Birmingham, AlabamaAges Up to 30 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.