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
- NCT07694687Recruiting
Studying a tool to spot confusion in intensive care patients
This study tests a new way to check for delirium (sudden confusion) in patients staying in the intensive care unit (ICU). It also looks at how family members can help spot these changes, so the care team can help sooner.
Shanghai, Shanghai MunicipalityAges 18 years+ - NCT07678177Recruiting
Study of tegoprazan for patients with GERD
This study looks at how well and how safely the drug tegoprazan works for people with gastroesophageal reflux disease (GERD). It may help if you have symptoms like heartburn or acid reflux.
SeoulAges 19 years+ - NCT07677033Recruiting
Bone and muscle health study for adults
This study looks at how well your bones and muscles work together. By measuring your bone density and handgrip strength, doctors can better understand your bone health and find ways to keep you strong as you age.
Küçükçekmece, IstanbulAges 18 years+ - NCT07677969Recruiting
Arm loss, balance, pain, and daily life study
This study looks at how the percentage of arm loss affects balance, neck and back pain, daily activities, and reaction time in people with one arm amputated who use a myoelectric or bionic hand. It may help understand how to improve care and rehabilitation.
AnkaraAges 18–65 - NCT07669493Recruiting
Heart safety during chest radiation for cancer patients
This study looks at how chest radiation affects heart function and the immune system, and whether it is safe in people with lung, esophageal, breast, or thymus cancer who have not had chest radiation before.
Shijiazhuang, HebeiAges 18 years+ - NCT03409263Recruiting
Registry for people with TIPS for high portal pressure
This study is a registry, meaning it collects health information to better understand people who have a TIPS procedure for high pressure in the liver’s blood vessels. It may help doctors improve how TIPS is used and monitored over time.
Vienna, State of ViennaAges 18–99 - NCT05416684Recruiting
PEEK vs titanium skull repair after brain surgery
This is an observation study that compares outcomes after two types of skull repair: PEEK and titanium. It may help doctors understand which option works best and how patients recover, without requiring an experimental treatment plan.
Shanghai, Shanghai MunicipalityAges 18–65 - NCT07654855Recruiting
Long-term safety of eplontersen in ATTR patients
This study follows people who already took part in an earlier trial (D8450R00003) to see how safe eplontersen is over the long term. It also includes people who had a liver transplant or severe liver problems.
Los Angeles, CaliforniaAges 18 years+ - NCT07654634Enrolling by invitation
Precision blood thinning therapy study
This trial tests personalized blood thinner treatment for people who need long-term anticoagulation for conditions like atrial fibrillation or blood clots. The goal is to find the safest and most effective dose for each patient.
Changsha, HunanAges 8 years+ - NCT07653659Recruiting
Lowering norepinephrine in shock: effects on blood vessel pressure
This study tests whether reducing the dose of a medicine that raises blood pressure (norepinephrine) affects how blood moves through the body in people with distributive shock. If you are on a steady low dose of norepinephrine and have a special heart monitor (PiCCO catheter), this trial may help doctors understand safer ways to wean the medicine.
Beijing, Beijing MunicipalityAges 18 years+ - NCT07653321Enrolling by invitation
Kidney injury in critically ill patients
This study looks at acute kidney injury in patients who are very sick in the intensive care unit (ICU). It may help doctors better understand and manage kidney problems in these patients.
BeijingAges 18 years+ - NCT07652489Recruiting
Surgery plus radiation for advanced sinus cancer
This study looks at whether surgery followed by radiation helps people with a specific type of sinus cancer called adenoid cystic carcinoma that has grown into nearby tissues. It aims to see how well this treatment works and how safe it is.
Harbin, HeilongjiangAges 18–80 - NCT07644117Recruiting
Personalized Anti-TNF Treatment for Inflammatory Bowel Disease
This trial tests a personalized approach to starting anti-TNF therapy—a common treatment for inflammatory bowel disease (IBD)—in patients who have never taken it before. The goal is to help doctors choose the right anti-TNF medication and dose based on each patient's individual characteristics.
Tel AvivAges 18 years+ - NCT06642532Recruiting
Using ultrasound to check brain blood flow after skull repair
This study uses a special ultrasound test to see how blood flow in the brain changes after you have surgery to replace a piece of your skull with a PEEK implant. It may help doctors understand if the surgery affects blood flow.
Shanghai, Shanghai MunicipalityAges 18 years+ - NCT07642401Enrolling by invitation
Building models to understand esophageal cancer
This research study uses medical records and imaging from patients with various esophageal conditions—from inflammation to cancer—to develop better diagnostic and prediction tools. Researchers want to understand what changes in the esophagus lead to cancer and how to catch it earlier.
Anyang, HenanAges 18–90 - NCT06685380Recruiting
Cognitive Control During Sleep: Self-Awakening Study
This study looks at how our brains control waking up on purpose during sleep. It may help people who can train themselves to wake up at specific times.
Milan, ItalyAges 18–65 - NCT07635641Recruiting
Proton Therapy for Recurring Head and Neck Cancer
This study tracks how well proton therapy (a precise radiation treatment) works when head and neck cancer comes back after previous treatment. Proton therapy uses high-energy particles instead of traditional X-rays, which may reduce side effects.
Rozzano, MilanoAges 18 years+ - NCT07633353Enrolling by invitation
Real-World Outcomes of a New Treatment for Advanced Kidney Cancer
This study looks at how well two newer cancer drugs (enfortumab vedotin and pembrolizumab) work together for advanced upper tract urothelial carcinoma—a rare kidney cancer. Researchers are collecting information from hospitals in France to understand how patients respond and what side effects occur in everyday care.
NîmesAges 18 years+ - NCT06222957Recruiting
How HER2 affects brown fat in breast cancer patients
This study looks at how a protein called HER2 affects brown fat activity in women with breast cancer. Brown fat helps burn calories and may influence treatment outcomes. You will be assigned to one of two groups based on your cancer's HER2 status, and the study will measure how your brown fat responds to cold.
CopenhagenAges 18 years+ - NCT07615400Recruiting
Long-term study of people with fucosidosis
This study follows people with fucosidosis over time to learn more about how the condition progresses. It is an observational study, so participants do not receive any new treatment—just regular health monitoring to help researchers better understand the disease.
Orange, CaliforniaAges Any age - NCT07620353Recruiting
Study of OROSEDAL for sore throat and mouth sores
This study observes how well OROSEDAL, a topical oral medication, works for sore throats and minor mouth ulcers or sores that have lasted less than 15 days. You'll be asked to track your pain relief while using the product your doctor prescribes.
Multiple LocationsAges 8 years+ - NCT05718726Recruiting
Study of infections after spleen removal surgery
This trial looks at what happens after surgery to remove the spleen in people who also have major cancer surgery through the belly. It may help reduce or better manage serious infections after this kind of operation.
Basingstoke, HampshireAges 18–79 - NCT07607769Recruiting
Tremelimumab and Durvalumab for Untreated Advanced Liver Cancer
This Italian study follows patients with advanced liver cancer (hepatocellular carcinoma) who receive a combination immunotherapy treatment called STRIDE for the first time. The trial tracks how well the treatment works, how it affects quality of life, and its safety in people with moderate to severe liver disease.
AnconaAges 18–100 - NCT07599332Recruiting
Study of Baby Weight Checks After Birth
This study watches when and how often newborn babies are weighed in the first days after birth. Researchers want to understand the best timing for these weight checks to help babies stay healthy.
IpswichAges 16 years+
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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.