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
- NCT07479472Recruiting
A study of digestive tract cancers in young adults
This study observes people aged 18-49 with a new gastrointestinal cancer (colorectal, stomach/esophageal, or pancreatic) to learn how their lifestyle habits and tumor characteristics affect their health. By participating, you help researchers understand why these cancers occur in younger adults.
Bologna, BOAges 18–49 - NCT05759299Recruiting
Airway management study during anesthesia with intubation
This study observes how breathing tube placement (intubation) and other airway care are done during general anesthesia in the operating room and in other anesthesia settings. It may help improve airway management practices in different clinical environments, but you would typically not receive a new treatment as part of an experimental trial.
Dallas, TexasAges 18 years+ - NCT06782789Recruiting
Study of Tafasitamab and Lenalidomide for aggressive B-cell lymphoma
This study looks back at medical records of people with relapsed or refractory diffuse large B-cell lymphoma who received a combination of two drugs (tafasitamab and lenalidomide) through a special access program. The goal is to learn how well the treatment worked and what side effects occurred.
Bologna, BolognaAges 18 years+ - NCT07464444Recruiting
Study testing a device that records heart and lung sounds
This study is testing a new device that records heart and lung sounds to see if it can help doctors better understand heart and lung conditions. You may be eligible if you have a known heart condition or if you are generally healthy, and if you've had or will have an echocardiogram (heart ultrasound) in the last or next year.
Montreal, QuebecAges 18–100 - NCT05835349Recruiting
Study of Venus P-Valve for lung valve problems
This observational study follows people who need a pulmonary valve treatment, to see how the Venus P-Valve works in real-world care. It may help doctors understand which patients benefit and how outcomes change over time.
Pessac, New AquitaineAges 12–70 - NCT06778174Recruiting
Treating progressive familial intrahepatic cholestasis
This study tracks treatments and outcomes for people with a confirmed genetic form of PFIC, a rare liver disease. It helps doctors learn which treatments work best for each type.
GroningenAges Any age - NCT07468097Recruiting
How metabolism affects pain in women with lipedema
This study looks at how metabolic health (like blood sugar and thyroid function) may influence pain and sensitivity in women with lipedema. It aims to better understand these links to improve treatment approaches.
Istanbul, PendikAges 18 years+ - NCT07458516Recruiting
Observing eye disease progression in type 2 diabetes
This study closely follows people with type 2 diabetes who have early signs of diabetic retinopathy (damage to the retina from diabetes) to see how the condition changes over time. It does not test a new treatment but monitors the eye's health closely. It may be a good fit if you have diabetic retinopathy that does not need immediate treatment.
CoimbraAges 35–80 - NCT07460557Recruiting
Link between jaw shape and vision
This study looks at how the shape of your jaw and face might relate to your eyesight. Healthy young adults aged 21 to 25 are needed to see if there is a connection.
ZagrebAges 21–25 - NCT07450664Enrolling by invitation
Observational study of VYKAT XR for Prader-Willi syndrome
This study follows people with Prader-Willi syndrome who are already taking or starting VYKAT XR, including those switching from an earlier version of the drug (DCCR). It aims to understand how the treatment works in everyday life.
Phoenix, ArizonaAges 4 years+ - NCT07437157Recruiting
Hong Kong diabetes fatty liver disease study
This research study looks at people with type 2 diabetes to learn more about fatty liver disease. By joining, you may help doctors better understand how these conditions are linked and improve future care.
Hong Kong, New TerritoriesAges 18 years+ - NCT04886401Recruiting
Study predicting response to pembrolizumab in advanced lung cancer
This study looks back at prior treatment to learn which patients with advanced non-small cell lung cancer (NSCLC) are more likely to respond to pembrolizumab, an immune therapy given up front. The results may help doctors better predict who benefits from this treatment.
BrestAges Any age - NCT06813586Recruiting
Study of cerebral palsy cases in Italy
This study observes children with cerebral palsy to better understand how common it is in Italy. It may help improve care and resources for people with CP.
Brindisi, ApuliaAges 4–18 - NCT07427810Recruiting
Follow-up study on teens with autism
This study is a follow-up for people who took part in an earlier research project. The researchers want to see how psychiatric conditions and daily functioning have changed over time.
Karlstad, Värmland CountyAges 20–35 - NCT07427849Recruiting
Using ultrasound to find endometriosis on pelvic ligaments
This study uses a special ultrasound to look for endometriosis on the uterosacral ligaments, which are small bands in the pelvis. It may help diagnose milder forms of endometriosis more accurately before surgery.
Naples, NapoliAges 18–50 - NCT07425639Recruiting
Switching From Omalizumab to OMLYCLO in Asthma or Hives
This study follows patients with severe asthma or chronic hives who are already on omalizumab (Xolair) and are switching to a very similar, lower-cost biosimilar called OMLYCLO. It aims to see if the switch works well in real-world practice.
MontpellierAges 18 years+ - NCT07416760Recruiting
Gut bacteria study after intestinal surgery
This study looks at how gut bacteria change after surgery to reconnect the intestines (anastomosis). It may help doctors understand complications and improve recovery.
MadridAges 18 years+ - NCT07417813Recruiting
Lemborexant for insomnia in people with mental health conditions
This study tests if lemborexant, a sleep medication, can help people with both a mental health condition and insomnia. You would take the medicine as prescribed and complete questionnaires over 2 months.
Suzhou, JiangsuAges 18 years+ - NCT07422584Recruiting
Cytokine response after hernia repair surgery
This study looks at how the body's immune system (cytokines) responds to a specific type of hernia repair called open retromuscular ventral hernia repair. It may help patients understand inflammation after surgery.
Chicago, IllinoisAges 18 years+ - NCT07424872Recruiting
VERANDA survey for patients and caregivers
This trial is a survey asking patients and caregivers about their needs and experiences. It aims to improve healthcare by learning from people like you.
Berlin, State of BerlinAges 18 years+ - NCT07424976Enrolling by invitation
Early brain injury detection after infant heart surgery
This study looks for early signs of brain injury in infants after heart surgery that uses a heart-lung machine. It aims to improve monitoring and care for babies with congenital heart disease.
LjubljanaAges 1 week–1 year - NCT05818332Recruiting
ClassIntra® tool to improve outcomes during surgery
This trial tests whether using an in-the-operating-room learning/documentation tool (ClassIntra®) can improve care and outcomes for patients during surgery. You may be invited if you’re having certain inpatient operations with anesthesia involvement.
NijmegenAges 18–110 - NCT07415798Recruiting
Study of how Chinese women's facial skin changes with age
This study uses a special camera to look at the deeper layers of facial skin in Chinese women of different ages. It aims to understand normal aging changes in healthy skin, which may help with future skincare research.
Shanghai, Shanghai MunicipalityAges 20–70 - NCT07411313Recruiting
Ultrasound to predict low blood pressure in older adults having spinal anesthesia
This trial uses ultrasound to check your internal jugular vein, which may help predict if your blood pressure will drop during spinal anesthesia. It aims to find better ways to keep you safe during surgery.
Ankara, YENİMAHALLEAges 65 years+
Hear when a new Observational Study trial opens
We’ll email you when one opens — at most once a week, no account needed, unsubscribe anytime.
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.