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
- NCT07010354Recruiting
BeFlow Stent Study for Iliac Artery Blockages
This study is testing a new stent called BeFlow to see how well it works and how safe it is for people with blocked or narrowed iliac arteries. The stent is placed permanently to keep the artery open.
AalstAges 18 years+ - NCT07007897Enrolling by invitation
Cataract treatment observation study
This study is for people with cataracts who are planning to get treatment. It will observe your eye health and treatment process without giving you any new medicine.
Mesa, ArizonaAges 21 years+ - NCT07009717Recruiting
Big toe strength and chemo nerve damage
This study looks at whether the strength of your big toe is related to nerve damage from chemotherapy. It involves a one-time test of your toe strength and some questionnaires. It may help researchers better understand how chemo affects your nerves.
Gainesville, FloridaAges 18–90 - NCT07004868Recruiting
Inflammation & treatment response in lung cancer immunotherapy
This study looks at how inflammation and body changes (like weight loss) affect how well immunotherapy works in lung cancer. If you are starting immunotherapy at the hospital in Tours, your doctors will collect information from your regular care to learn more about your response.
ToursAges 18 years+ - NCT06996665Recruiting
High-flow nasal cannula based on diaphragm ultrasound
This study uses ultrasound to match high-flow oxygen settings to your diaphragm's movement. It looks at how breathing muscles respond at different flow rates to give you the best support.
Hangzhou, ZhejiangAges 18 years+ - NCT06983847Recruiting
Long-term study of Vitamin-C Injektopas in vitamin C deficiency
This study observes patients with vitamin C deficiency who receive Vitamin-C Injektopas 7.5 g over time to understand how it is used and its effects. It may help if you have low vitamin C levels.
Vienna, Etc., AustriaAges 18–120 - NCT06989385Recruiting
Studying breathing support failure in respiratory failure
This study looks at why some patients with acute respiratory failure do not improve with non-invasive breathing support like high-flow nasal oxygen (HFNO) or non-invasive ventilation (NIV). It aims to find patterns that might predict when these treatments are not enough.
ModenaAges 18 years+ - NCT04862000Recruiting
Study of people with endometriosis or adenomyosis
This is an observational study, meaning researchers watch and describe symptoms and health information over time without testing a new treatment. It may help researchers better understand endometriosis and adenomyosis and how people experience them.
Hong KongAges 18 years+ - NCT06972797Enrolling by invitation
Comparing Computer Methods for Measuring Upper Canine Teeth
This study compares two computer methods for measuring an upper canine tooth that has not come in properly. It uses a 3D scanning tool to see which method gives more accurate results and could help dentists plan better treatments.
Cairo, Cairo GovernorateAges 8–70 - NCT06805253Recruiting
Heart recovery after surgery for leaky aortic valve
This trial studies how well the heart's main pumping chamber (left ventricle) recovers after surgery to fix a leaky aortic valve. It is for people who also have a leaky mitral valve and an enlarged left ventricle, and who are having their first planned valve surgery.
MoscowAges 18 years+ - NCT06961175Recruiting
Platelet function study in heart surgery
This study looks at how well platelets work during heart surgery using a special test called thromboelastography. It may help doctors understand and manage bleeding risks in people having planned heart surgery with a heart-lung machine.
SalamancaAges 18 years+ - NCT06957158Recruiting
How calcium levels affect pain after abdominal surgery
This study looks at whether calcium levels in your blood can affect how much pain you feel after abdominal surgery. It may help doctors manage pain better after surgery in the future.
Chongqing, Chongqing MunicipalityAges 18–70 - NCT06952738Recruiting
Studying bacteria around hip or knee fracture repairs
This trial looks for bacteria around the implant in patients who need surgery for a broken bone near a hip or knee replacement. It aims to learn if these infections affect healing.
Chicago, IllinoisAges 18 years+ - NCT06954636Recruiting
Smell test to predict glioblastoma outcomes (newly diagnosed)
This study looks at whether a simple smell test can help predict how glioblastoma will progress. It is for people who are newly diagnosed and have not started treatment yet.
EssenAges 18 years+ - 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+ - NCT06949254Recruiting
Study of radiation and hormone therapy for high-risk prostate cancer
This study looks at combining stereotactic body radiation therapy (a precise type of radiation) with hormone therapy for men with high-risk prostate cancer that hasn't spread. The goal is to see how well this treatment works with fewer side effects.
Bergamo, BergamoAges 18 years+ - NCT06933277Recruiting
Study of selinexor, bortezomib, and dexamethasone for multiple myeloma
This observational study looks at a three-drug combination (selinexor, bortezomib, and dexamethasone) for people with multiple myeloma that has come back after 1 to 3 prior treatments. It may be an option if you've already tried and not responded to lenalidomide.
FlorenceAges 18 years+ - NCT06935773Enrolling by invitation
Simulation training for ICU and emergency nurses
This trial tests whether high-fidelity simulation training improves skills for nurses in acute care. Nurses with at least 3 months of experience in critical care and ACLS training can join.
Changhua, LukangAges 20–65 - NCT05780099Recruiting
Study of patients treated in internal medicine clinics
This observational study follows people receiving care in Internal Medicine at San Raffaele Hospital to better understand what kinds of conditions they have. It does not test a new treatment, but your information may help improve future care.
MilanAges 18 years+ - NCT06897007Recruiting
Ciprofol dosage in patients with insomnia under anesthesia
This study looks at how the sedative drug ciprofol works differently in people with insomnia compared to those who sleep well. It aims to help doctors give the right dose for your type of surgery.
Beijing, Beijing MunicipalityAges 18–64 - NCT05907681Recruiting
Study outcomes after precise targeted radiation for metastatic breast cancer
This study follows people with breast cancer that has spread to other parts of the body who receive a highly precise form of radiation (like IMRT, SBRT, or proton therapy). It aims to see how well this treatment strategy works and what outcomes patients experience.
SeoulAges 19–100 - NCT06874920Enrolling by invitation
Antibiotic choice based on hospital lab reports in transplant patients with bloodstream infection
This study looks at whether choosing antibiotics based on local hospital lab reports (antibiograms) works well for organ transplant patients who have a single bacteria in their bloodstream. It hopes to find the best way to treat these infections.
MilanAges 18 years+ - NCT06878131Recruiting
Precision-MRD: Targeted therapy study for colorectal cancer with MRD
This study looks at how well targeted therapies work for people with colorectal cancer who have minimal residual disease (MRD, tiny amounts of cancer left after treatment) detected by a blood test. It is for people who have a specific genetic change (biomarker) in their tumor and have not been treated with the targeted therapy for that biomarker before.
Houston, TexasAges 18 years+ - NCT06868355Recruiting
Can a fitness tracker help measure activity in cancer trials?
This study tests whether wearing a fitness tracker (like a step counter) is a practical way to measure how active you are while you are in an early-phase cancer clinical trial. It will help researchers see if this is something they can use in future trials.
MilanAges 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.