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
- NCT06189079Recruiting
Arterial embolization for painful bone metastases
This study tests a procedure called arterial embolization, which blocks blood flow to bone tumors, to see if it can reduce pain or prevent fractures. It is for people with bone cancer that has spread from another cancer (metastases).
Bologna, Emilia-RomagnaAges 18 years+ - NCT06192719Recruiting
Study of gallbladder cancer, dysplasia, and gallstones
This trial is studying people with gallbladder cancer, abnormal cell changes (dysplasia), or gallstones. It aims to learn more about these conditions, possibly before or after treatment, or before gallbladder removal surgery.
SaltaAges 18 years+ - NCT06164561Recruiting
FAPI PET/MRI scan for myelofibrosis
This trial tests whether a special type of PET scan (using a tracer called 18F-FAPI) can see myelofibrosis activity better than standard scans. It may help doctors track the disease more accurately without needing extra biopsies.
Hangzhou, ZhejiangAges 18–80 - NCT06158360Recruiting
Post-surgery symptoms after thyroid cancer surgery
This study looks at how you feel after thyroid surgery for cancer. It tests whether adding Chinese medicine treatments can help with symptoms like pain or fatigue during recovery.
Gyeonggi-doAges 19 years+ - NCT06148935Recruiting
Study of vericiguat in Korean heart failure patients
This study looks at how well Verquvo (vericiguat) works in daily life for Korean adults with chronic heart failure and a weak heart pump. It’s for people whose heart failure has recently gotten worse and who are starting Verquvo for the first time.
Multiple LocationsAges 19 years+ - NCT06119542Recruiting
GlycOrtho: Endothelial damage in major spine surgery
This study looks at how major spine surgery affects the inner lining of blood vessels. It measures a substance called syndecan-1 in the blood to understand this damage.
Bologna, BOAges 12–75 - NCT04885179Recruiting
Study of SPLIS genetics and patient experiences
This observational study and patient registry collects information from people diagnosed with SPLIS due to specific changes in the SGPL1 gene, including children and newborns. It helps researchers understand the condition better and may improve future care and research planning.
San Francisco, CaliforniaAges Any age - NCT06089980Recruiting
Kratom product study for regular users
This study watches how regular kratom users react to their own kratom product. It aims to learn more about kratom's effects in real-world settings.
Baltimore, MarylandAges 21 years+ - NCT06059963Recruiting
Simple blood test for colorectal cancer screening
This study is testing a new blood test (Signal-C) to see if it can help find colorectal cancer early. You may be able to join if you are average risk and getting a routine screening colonoscopy.
Raonoke, VirginiaAges 45–84 - NCT06069973Recruiting
Using AI to spot delayed brain injury after a brain bleed
This study uses artificial intelligence (machine learning) and blood tests to find early signs of delayed brain injury after a brain bleed. It aims to help doctors detect and treat this complication sooner.
GothenburgAges 18–110 - NCT06067529Recruiting
Study on the health effects of early menopause
This study follows women with premature ovarian insufficiency (POI) over time to understand how it affects their health. Researchers will collect samples and track health changes to learn more about the condition and its long-term effects.
Hangzhou, ZhejiangAges 10–65 - NCT03099681Recruiting
Study of epithelioid sarcoma care and follow-up
This is an observational study for people diagnosed with epithelioid sarcoma, focused on how patients are followed over time. It does not appear to test a new treatment, but it can help doctors better understand the disease and follow-up needs.
Meldola, FCAges Any age - NCT05728359Recruiting
Genetic study of outcomes in cardiogenic shock
This study looks at whether a person’s genetic information (genomics) can help predict outcomes in cardiogenic shock. You may be asked to give consent and provide information during a serious heart-related emergency, usually soon after symptoms start.
LondonAges 18–80 - NCT06023030Recruiting
Observing how upadacitinib works for Crohn's disease in Japan
This study is for people with moderate to severe Crohn's disease who are starting a medication called upadacitinib. Researchers will watch how the disease changes over time and check for any side effects. It's an observational study, meaning you'll keep getting your regular treatment.
Anjo-shi, Aichi-kenAges 15 years+ - NCT06017622Recruiting
THC Levels in Young People with Cannabis Overdose in the ER
This study looks at the amount of THC (the active ingredient in cannabis) in the blood of children and teens who come to the emergency room with severe drowsiness or confusion after using cannabis. It will help doctors better understand how cannabis affects young people.
Worcester, MassachusettsAges Any age - NCT05992909Recruiting
Lymphovenous bypass to prevent leg swelling after groin lymph node removal
This study looks at whether a surgical procedure called lymphovenous bypass can help prevent leg swelling (lymphedema) after lymph node removal from the groin or pelvis. Researchers will observe patients who undergo this bypass to see if it reduces swelling compared to traditional recovery.
Houston, TexasAges 18 years+ - NCT05942859Enrolling by invitation
AI study using heart ECGs to spot pulmonary hypertension
This study looks at patterns on a 12-lead ECG (a common heart tracing) to help diagnose pulmonary hypertension, using results from a right heart catheter test. It may help doctors use ECGs better in the future, without changing your current care.
BathAges 18 years+ - NCT04615104Recruiting
Study of pelvic and hip-joint bone fractures
This study is observing people with pelvic ring and acetabular (hip-joint socket) fractures to better understand what happens over time. It may help doctors improve care, even though it does not test a new treatment.
Charlotte, North CarolinaAges 18 years+ - NCT05919511Recruiting
Questionnaire study for people at risk after stem cell transplant
This observational study follows people who had a stem cell transplant a few months ago to better understand risk for chronic graft-versus-host disease. You won’t get a study treatment; instead, you’ll complete questionnaires over time, and the study team looks at your symptoms and experiences.
Birmingham, AlabamaAges 18 years+ - NCT05921240Enrolling by invitation
Study on access to vision care for young people with vision needs
This study looks at what gets in the way of getting vision services for children and teens with special vision needs. It will help identify barriers and solutions by using questionnaires and interviews in Chinese.
TaipeiAges 19–99 - NCT05885698Recruiting
Study of care patterns in newly diagnosed lung cancer
This observational study follows adults with newly diagnosed non-small cell lung cancer to understand what treatments are used and how patients are doing. It may help doctors better understand how care decisions affect outcomes, and it does not require the study to give an experimental treatment.
Daphne, AlabamaAges 18 years+ - NCT05875740Recruiting
Memory T cells and sepsis severity study
This study looks at a type of immune cell called 'memory CD8+ T cells' in patients with sepsis, a life-threatening response to infection. The goal is to see if these cells are linked to how severe the sepsis is and the risk of dying. This may help doctors better predict outcomes for people with sepsis.
Wuhan, HubeiAges 18–60 - NCT05851755Enrolling by invitation
Italian lung cancer study observing care and outcomes
This is an observational study of people with lung cancer. The goal is to better understand care patterns and outcomes; joining would involve giving consent and answering study questions.
L’AquilaAges 18 years+ - NCT05821894Recruiting
Imaging study of plaque in neck arteries before surgery
This study uses pictures (imaging) to learn more about plaque in the neck arteries in people who are being considered for carotid endarterectomy. The results may help doctors better understand artery plaque and improve care.
Malmö, Skåne CountyAges 18 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.