Clinical trials
Observational Study clinical trials
Below are recruiting observational study clinical trials, each written for real people, not researchers. We’re tracking 837 recruiting studies, each written for real people, not researchers, below.
Recruiting studies
- NCT05234177Recruiting
Blood test to track colorectal cancer after surgery
This study looks at a blood “DNA” test to see if it can help monitor colorectal cancer after surgery. It may benefit you by improving how doctors track cancer during routine follow-up visits.
Fort Smith, ArkansasAges 18 years+ - NCT06976736Recruiting
Long-term follow-up for TScan TCR-T therapy patients
This study follows participants who previously received a TCR-T cell therapy in a TScan-sponsored trial to monitor long-term effects.
Duarte, CaliforniaAges 18–110 - NCT07246980Recruiting
Allay hydrogel cap safety monitoring study
This study monitors patients who receive the Allay hydrogel cap to check its safety and how well it works. It helps doctors learn more about this treatment.
Orlando, FloridaAges Any age - NCT05119387Recruiting
Genetic study for amyotrophic lateral sclerosis (ALS) in Norway
This study looks at genetic (inherited) factors in people with ALS. Your participation may help researchers better understand why ALS happens and who might be at risk.
BergenAges 16–100 - NCT07356700Recruiting
Why do some people live past 95? A study in Hong Kong
This study looks at older adults who are at least 95 years old and of Han Chinese ethnicity to understand what helps people live a very long life. You'll be asked to provide a blood sample so scientists can study your genes and other health factors.
Hong KongAges 65 years+ - NCT07369193Recruiting
Virtual reality therapy for cerebral palsy motor skills
This study tests whether a special immersive virtual reality therapy can help children with cerebral palsy improve their motor skills. It also looks at how the brain responds during the therapy. The study is a pilot, meaning it's a small first step to see if the treatment is promising.
Calambrone, PisaAges 7–25 - NCT04504955Enrolling by invitation
Atopic dermatitis patient registry for medication safety and results
This study is a real-world registry that collects information from adults with atopic dermatitis (eczema) to track how newly started treatments work and how safe they are over time. It may help researchers and doctors better understand medication effects in everyday care.
Waltham, MassachusettsAges 18 years+ - NCT05708807Recruiting
Follow-up study of recovery after first-time stroke in Gothenburg
This study tracks how people recover after their first-ever stroke (either blocked artery stroke or bleeding in the brain). It may help doctors better understand recovery patterns and what support could work best over time.
GothenburgAges 18 years+ - NCT06827678Recruiting
Study of Alzheimer’s disease using brain scans in China
This study uses brain imaging to understand early changes in Alzheimer's disease. It may help people with or without memory problems learn more about their condition and support future treatments.
ShanghaiAges 45–90 - NCT04377854Recruiting
Checking whether BNP predicts outcomes in advanced heart failure
This study looks at whether a blood test called BNP can help predict what happens over time in people being evaluated for advanced heart failure treatment. It may help doctors better plan care and follow-up for patients long-term.
Copenhagen, DKAges 18 years+ - NCT06297993Recruiting
Global study following adults with PSC
This study follows adults with primary sclerosing cholangitis (PSC) over time to learn more about the condition. It is observational, meaning no new treatments are tested—just regular checkups and data collection to better understand PSC.
Sacramento, CaliforniaAges 18–75 - NCT07301463Recruiting
Study of a new drug for children with achondroplasia
This trial tests a new medicine for children with achondroplasia (a common form of dwarfism). It aims to see if the drug can improve growth. The study is for children aged 2.5 to under 11 years old who have not started puberty and can walk without help.
Beijing, Beijing MunicipalityAges 2.5 years–11 years - NCT02166372Recruiting
Testing weight-loss surgery vs standard care for type 2 diabetes
This study compares people with type 2 diabetes and higher body weight who meet criteria for metabolic (weight-loss) surgery versus people with mild obesity who do not. It aims to see whether surgery improves diabetes-related outcomes more than usual medical care.
Taoyuan CityAges 20–67 - NCT06233539Recruiting
Study on diagnosis and treatment for neck bone dislocation
This trial aims to find the best ways to diagnose and treat a specific type of neck bone problem called atlantoaxial dislocation. It is for people who have this condition and are having surgery.
Beijing, Beijing MunicipalityAges Any age - NCT07575061Recruiting
Long-term study of survival factors in intestinal tuberculosis
This 15-year study follows patients with intestinal tuberculosis (a bacterial infection of the digestive tract) to understand what factors affect how long patients survive and live with this condition. The research may help doctors better predict outcomes and improve care for future patients.
Beijing, Beijing MunicipalityAges 18–100 - NCT05247502Recruiting
Study of kidney outcomes after ICU kidney injury
This study follows adults who stay in the ICU for more than 24 hours to see how an episode of acute kidney failure affects kidney health over the long term. Your participation helps researchers understand which ICU patients may need closer kidney monitoring later.
Clermont-FerrandAges 18 years+ - NCT05423860Recruiting
HALO prostate study for men with early prostate cancer
This trial studies HALO, a new “human analytics” approach, in men with early-stage prostate cancer. It may help doctors better assess or guide care using MRI and biopsy findings, before or around initial treatment.
Indian Wells, CaliforniaAges 45–90 - NCT06650969Recruiting
Early detection of cognitive decline in type 2 diabetes
This study is looking at ways to catch early thinking and memory changes in people with type 2 diabetes. By joining, you may help doctors learn how to spot problems sooner and find better ways to help.
Nanjing, JiangsuAges 45 years+ - NCT05374616Recruiting
Study of TANGO2-related conditions and tissue samples
This study follows people with a TANGO2 gene change and collects medical information and samples over time. It aims to better describe the condition and build a biorepository (a secure collection of samples) to support future research.
Houston, TexasAges birth+ - NCT06389409Recruiting
Quality of life after testicular cancer surgery
This study looks at how testicular cancer and its treatments affect your quality of life and daily function. Researchers want to learn more about the long-term outcomes of surgery so they can better support patients like you.
Milan, LombardyAges 18 years+ - NCT06545994Recruiting
Studying kisspeptin hormone levels in PCOS pregnancy
This study looks at a hormone called kisspeptin in pregnant women with PCOS. It aims to understand how this hormone changes during pregnancy, which may help improve care for women with PCOS.
Shanghai, Shanghai MunicipalityAges 18–40 - NCT06591039Recruiting
Breast cancer patient study in China
This study follows people diagnosed with breast cancer to learn more about the disease and treatment. It may help improve future care.
Shanghai, Shanghai MunicipalityAges Any age - NCT06513780Recruiting
Liver transplant and portal vein blood clot study
This study looks at how blood clots in the portal vein (the main vein to your liver) affect recovery and outcomes after a liver transplant. If you've had a liver transplant, your data may help doctors understand this better.
BeijingAges 18 years+ - NCT06621056Recruiting
Risk factors and outlook for frequent asthma flare-ups
This study looks at people with asthma to understand what raises the risk of having frequent asthma attacks and how these attacks affect long-term health. The goal is to find ways to better predict and help manage these flare-ups.
Beijing, Beijing MunicipalityAges 18–80
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Common questions
- Are there clinical trials for observational study?
- Yes. Clin2 currently lists 837 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.