Clinical trials
Observational Study clinical trials
Below are recruiting observational study clinical trials, each written for real people, not researchers. We’re tracking 841 recruiting studies, each written for real people, not researchers, below.
Recruiting studies
- NCT06252753Recruiting
Observational study of durvalumab for liver and bile duct cancer
This study looks at how well durvalumab (Imfinzi) works for people with liver or bile duct cancer. It follows your treatment as part of regular care to gather more information.
Birmingham, AlabamaAges 18–130 - NCT06316752Recruiting
Natural history study of sialidosis type I
This study follows people with sialidosis type I over time to understand how the condition progresses. Participants will have regular exams, blood draws, brain scans, and eye tests.
Taipei, TaipeiAges 12–80 - NCT07447440Recruiting
Study on natural fats linked to obesity-related diseases
This trial explores how certain natural fats in the body might affect diseases linked to obesity, such as breast cancer. It aims to see if these fats can reduce inflammation and improve health.
Pamplona, NavarreAges Any age - NCT07595094Recruiting
Blood Age Test for Predicting Health and Disease Risk
This study uses a special blood test to calculate your 'biological age' and predict your risk for serious illness, death, and how long you'll live healthy. Researchers want to understand if this test can help doctors catch health problems early.
Nanchang, JiangxiAges 35 years+ - NCT07354971Recruiting
Immuno-fit study for patients on immunotherapy
This study looks at how well patients with solid tumors who are receiving immunotherapy (checkpoint inhibitors) can exercise. It aims to see if exercise testing can help track your health during treatment.
Southampton, HampshireAges 18 years+ - NCT07094776Enrolling by invitation
MG53 protein levels in women with PCOS
This study measures a protein called MG53 in the blood of women with and without PCOS to see if it could be a marker for the condition. If you have PCOS and are not taking certain medications, you may be able to join and help researchers better understand the disease.
Gaziosmanpaşa, IstanbulAges 18–45 - NCT06845631Recruiting
Study of Freedom PNS for chronic pain
This study looks at how well the Freedom PNS system works for people who already have it implanted. It helps doctors learn more about treating chronic pain with this device.
Cleveland, OhioAges 18 years+ - NCT07552285Recruiting
New MRI imaging for better prostate cancer detection
This study tests whether new MRI imaging methods can better identify and grade prostate cancer in men with elevated PSA levels. You would get an MRI scan to help doctors see if cancer is present and how aggressive it might be.
Suzhou, JiangsuAges 20–90 - NCT06896370Recruiting
Gastric cancer study for people with high-risk H. pylori
This study follows people who carry a high-risk type of Helicobacter pylori (a stomach bacteria) to see if they develop gastric cancer. It aims to understand who is most at risk and how to monitor them over time.
TonglingAges 40 years+ - NCT06521047Recruiting
Long-term follow-up for EXCELLENT trial participants
This study looks at the long-term health of people who took part in the EXCELLENT trial. If you finished that trial within the last 10 years, you may be able to join this study to help researchers understand how participants are doing over time.
Mulhouse, FranceAges 18 years+ - NCT07243379RecruitingPhase 4
Studying nanocrystalline megestrol acetate for weight loss in cancer
This study tests a special form of the drug megestrol acetate (Megace) in cancer patients who have lost weight and appetite (cachexia). It aims to see if this medication can help improve weight gain and quality of life.
Zhengzhou, HenanAges 18–85 - NCT07662018Recruiting
Study of stem cell transplant after chemo for children with germ cell tumors
This study looks at how well a stem cell transplant works after a specific combination of chemotherapy drugs (gemcitabine, docetaxel, melphalan, and carboplatin) in children and young adults up to age 21 whose germ cell tumors have come back or not responded to treatment. It may help doctors understand who benefits most from this approach.
Houston, TexasAges 21 years+ - NCT07213700Recruiting
Long-term study on Alzheimer's disease
This study follows people who are either being evaluated for Alzheimer's disease or have already been diagnosed. Researchers want to track their health over many years to better understand the disease and how treatments affect it.
GrazAges Any age - NCT07117227Recruiting
Study to test a kidney cancer prediction model
This study is checking how well a model can predict the outcomes for people with kidney cancer who have had surgery. It looks at your medical records after surgery to help doctors better understand your recovery and future risks.
Beijing, Beijing MunicipalityAges 18–80 - NCT07374614Recruiting
Study of iruplinalkib after lorlatinib for ALK-positive lung cancer
This trial is for people with advanced lung cancer whose tumors have an ALK gene change and who have already taken a medicine called lorlatinib. It tests a new drug, iruplinalkib, to see how well it works for those who stopped responding to or couldn't tolerate lorlatinib.
Shenzhen, GuangdongAges 18 years+ - NCT06292299Recruiting
Breathing monitor study for children with sleep or breathing issues
This study looks at how well a new breathing monitor works for children with sleep problems, breathing pauses in newborns, or epilepsy. It may help doctors better understand breathing patterns without extra needles or blood tests.
Glasgow, Glasgow CityAges 1 minute–16 years - NCT06522347Recruiting
A lung infection registry study in Austria
This study creates a registry of patients in Austria who have a lung infection caused by tuberculosis or similar bacteria. By joining, you help researchers learn more about these infections and how to better treat them.
ViennaAges 18 years+ - NCT06666816Recruiting
Watching changes in walking for muscle and nerve diseases
This study watches how people with certain muscle or nerve diseases walk over time. It may help doctors understand changes in walking patterns and is open to adults who can walk and have a genetic diagnosis of a neuromuscular condition.
Bosisio Parini, LeccoAges 18–75 - NCT06830473Recruiting
Study on predicting kidney transplant rejection in Scotland
This study looks at whether certain tests can help predict or diagnose kidney transplant rejection. If you have had a kidney transplant and are being followed at a main transplant centre in Scotland, you may be able to take part by giving urine samples during your regular check-ups.
EdinburghAges 18–99 - NCT06445673Enrolling by invitation
Long-term follow-up study for PAH patients from TripleTRE
This study follows up with people who previously took part in another PAH study called TripleTRE. It observes their long-term treatment and health outcomes without giving any new medication. If you were in TripleTRE, you may be able to continue sharing your experiences.
LinzAges 18 years+ - NCT06941025Recruiting
Safety of Elfabrio in pregnant and breastfeeding women with Fabry disease
This study follows women with Fabry disease who took the medicine Elfabrio during pregnancy or breastfeeding to see if it is safe for them and their babies. It helps doctors learn more about how this treatment affects mothers and infants.
Washington D.C., District of ColumbiaAges Any age - NCT07597993Recruiting
Real-world study of Trastuzumab Deruxtecan for advanced breast cancer
This study follows women with advanced breast cancer (metastatic) who have hormone-receptor positive tumors and low HER2 levels, to see how well a new drug called Trastuzumab Deruxtecan works when used in routine clinical care after prior hormone therapy.
MuscatAges 18 years+ - NCT06487286Recruiting
Visfatin/NAMPT levels in breast milk study
This study looks at a substance called visfatin/NAMPT in breast milk to learn more about its role in newborn health. It involves healthy full-term babies and their mothers who are in the hospital and can provide breast milk samples.
Ponderano, BIAges Any age - NCT06522334Recruiting
Lung disease registry study in Austria
This study collects information from people with interstitial lung disease in Austria to learn more about the condition and how it progresses. It does not involve any experimental treatment.
ViennaAges 18 years+
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Common questions
- Are there clinical trials for observational study?
- Yes. Clin2 currently lists 841 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.