Clinical trials
Observational Study clinical trials
Below are recruiting observational study clinical trials, each written for real people, not researchers. We’re tracking 840 recruiting studies, each written for real people, not researchers, below.
Recruiting studies
- NCT07169708Recruiting
Study of nivolumab and chemo before surgery for lung cancer
This trial looks at real-world outcomes in Taiwan for people with resectable non-small cell lung cancer (NSCLC) who get nivolumab combined with chemotherapy before surgery. It aims to understand how well this treatment works and how safe it is.
Kaohsiung CityAges 18 years+ - NCT06021483Recruiting
Observing safety and effectiveness of Zepzelca for lung cancer
This study tracks how safe and effective the drug Zepzelca (a chemotherapy) is for people with advanced small cell lung cancer that has not responded to earlier platinum-based chemo. It allows patients to receive the drug as part of their normal care while researchers collect data.
SeoulAges 19 years+ - 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 - NCT07081139Recruiting
Visual screening study for children with special needs
This study uses a video-based eye-tracking system to test how well children with special needs and typical preschoolers can see. It aims to find a friendly way to screen vision without asking children to read letters.
TaipeiAges birth–70 years - NCT07075445Recruiting
Living with long QT syndrome types 2 and 3
This study looks at how long QT syndrome types 2 and 3 affect your daily life and health. It asks you to wear a smartwatch and answer questions to help researchers understand the challenges you face.
Greenville, North CarolinaAges 18 years+ - NCT06425354Recruiting
Can breathing machine energy predict lung inflammation?
This study looks at a new measure called 'mechanical power' (the energy from the breathing machine) to see if it can predict inflammation in the lungs and blood of patients with low oxygen levels. It may help doctors better understand how the breathing machine affects lung damage.
RomaAges 18 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+ - NCT07503665Recruiting
AI-assisted fall prevention study for hospital staff, patients, and families
This study explores how AI-assisted fall prevention tools work in hospitals. Researchers will interview staff, managers, patients, and family members, observe staff work, and review medical records to understand the implementation and impact.
GothenburgAges 18 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 - NCT06624982Recruiting
Bone Changes After Tooth Extraction and Grafting
This study looks at how your jawbone changes after a tooth is pulled and a bone graft is put in. If you need a single tooth removed and have good general health, you may be able to join.
Milwaukee, WisconsinAges 18–75 - 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 - 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 - 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+ - 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+ - NCT07351838Recruiting
Heart MRI for risk screening in early cardiomyopathy
This study uses heart MRI to find people with early signs of heart muscle disease who still have normal-sized heart chambers. It aims to better predict who is at risk so they can get earlier care.
BeijingAges 16 years+ - NCT05357456Recruiting
Study of brain and memory changes in cortisol-producing adrenal conditions
This study tracks thinking and brain changes over time in people with adrenal findings that produce too much cortisol (a stress hormone) on their own. It may help doctors understand how different treatments or watchful waiting affect the brain and cognition.
Nanjing, JiangsuAges 20–65 - 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 - 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+ - NCT06577402Recruiting
Study on energy and protein in severe brain injury patients
This study measures how your body uses energy and protein if you are in the ICU with a severe brain injury while on a breathing machine. It can help doctors better understand your recovery needs.
Nanjing, JiangsuAges 18–85 - NCT06879964Recruiting
Radiation after surgery for high-grade skin cancer
This study looks at whether radiation therapy after surgery helps people with a high-grade type of skin cancer called squamous cell carcinoma. It may help doctors understand who benefits most from this additional treatment.
Pavia, PaviaAges 18 years+ - NCT06636045Enrolling by invitation
Blood flow restriction after ACL surgery with quad graft
This study tests whether using a special blood flow restriction cuff after ACL surgery helps you recover faster and stronger. It is for people having ACL reconstruction using their own quadriceps tendon for the first time.
Kansas City, KansasAges 14–40 - NCT07223372Recruiting
Study on male hormone blocking drugs for prostate cancer in Australia
This study looks at how certain drugs (darolutamide, enzalutamide, apalutamide, or abiraterone) that block male hormones are used to treat men with prostate cancer that has spread. It aims to understand real-world treatment patterns in Australia.
Pymble, New South WalesAges 18 years+ - NCT07200726Recruiting
Brain inflammation and thinking after heart surgery
This study looks at whether brain inflammation during heart surgery may affect memory and thinking. It includes people aged 60 and older who are having planned heart surgery.
Genk, LimburgAges 60 years+ - NCT06849193Recruiting
Predicting treatment outcomes in advanced bile duct cancer
This study looks at how well current chemotherapy and immunotherapy work for advanced bile duct or gallbladder cancers that cannot be removed by surgery. Researchers will collect data from multiple centers to build a model that helps predict how patients may respond to treatment.
Nanjing, JiangsuAges 18 years+
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Common questions
- Are there clinical trials for observational study?
- Yes. Clin2 currently lists 840 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.