Clinical trials
Observational Study clinical trials
Below are recruiting observational study clinical trials, each written for real people, not researchers. We’re tracking 839 recruiting studies, each written for real people, not researchers, below.
Recruiting studies
- NCT05210543Recruiting
Study people after a severe allergic reaction
This trial follows people who have had anaphylaxis (a severe, life-threatening allergic reaction) within the last year. The goal is to better understand what happens over time so doctors can improve care.
BerlinAges Any age - NCT06948565Recruiting
Cirrhosis patients in the ICU: a 10-year review
This study looks back at medical records of people with cirrhosis who were treated in an intensive care unit (ICU) over the last 10 years. Researchers want to understand what factors affect their recovery and outcomes.
BesançonAges Any age - NCT07215988Recruiting
Studying insurance for skin cancer treatment
This study looks at how insurance covers immunotherapy given before surgery for certain skin cancers. It includes people with Merkel cell, mucosal melanoma, basal cell, or other rare skin cancers who are planning to have surgery.
Columbus, OhioAges 18 years+ - NCT03303833Recruiting
Lynch syndrome study following people over time
This study follows adults with Lynch syndrome (an inherited gene change) using regular questionnaires and tracking health over time. It may help researchers understand how the condition progresses and improve care for people with these gene mutations.
WageningenAges 18–80 - NCT05635747Enrolling by invitation
90-day follow-up study for children using RELiZORB
This study follows children who are already taking RELiZORB to see how it’s going over time and whether it remains safe and tolerable, with effects on nutrient absorption. It doesn’t change treatment—it mainly looks at outcomes during the next 90 days.
Los Angeles, CaliforniaAges 2–18 - NCT07048327Recruiting
Study of uterine disease diagnosis
This study observes patients who need a scope exam or scraping of the uterus to look for conditions like polyps, fibroids, or cancer. It aims to gather information to improve care.
Wuhan, HubeiAges 18–80 - NCT07400809Recruiting
Cervical cancer with limited spread: a study on treatment results
This study looks at women with cervical cancer that has spread to only a few places (oligo-metastatic) or come back in a few places (oligo-recurrent). It hopes to understand how well treating those spots with radiation or other local treatments works, even if you've already had treatment before.
Mumbai, MaharashtraAges Any age - NCT07276087Recruiting
Physical and Mental Health in Takayasu Arteritis and Behçet's Disease
This study compares physical and mental health in people with Takayasu arteritis or Behçet's disease to healthy volunteers. It aims to better understand how these conditions affect day-to-day life and well-being.
Denizli, DenizliAges 18 years+ - NCT07609394Recruiting
Duchenne and Becker Muscular Dystrophy Health Records Study
This study collects electronic health records (medical information already in your doctor's computer system) from people with Duchenne or Becker muscular dystrophy, or female carriers of these conditions. Researchers will use this data to better understand the diseases and improve care over time.
Little Rock, ArkansasAges Any age - NCT06193850Recruiting
Quality of life study for urology outpatients
This study is checking how your daily life is affected by your urology condition. It is an observational study, meaning you will just fill out questionnaires about your quality of life at your regular clinic visits.
Milan, LombardyAges 18 years+ - NCT07124299RecruitingPhase 4
Alpha-blockers before kidney stone surgery: a randomized study
This trial tests whether taking an alpha-blocker medication before a type of kidney stone surgery (flexible ureteroscopy) helps the surgeon insert the ureteral access sheath more easily. Alpha-blockers are drugs that relax certain muscles, possibly making the procedure smoother and safer.
Santo André, São PauloAges 18 years+ - NCT07660640Enrolling by invitation
Long-term follow-up for VOY-101 eye injection study
This study follows up with people who already received the VOY-101 injection for a type of age-related vision loss (non-neovascular age-related macular degeneration) in an earlier study. It checks how they are doing over a longer period of time.
Boston, MassachusettsAges 50 years+ - NCT06805474Recruiting
Study of a vision test for Stargardt and geographic atrophy
This study tests a new way to measure vision, called MLSDT, in people with normal sight or vision loss from Stargardt disease or geographic atrophy (a type of advanced age-related macular degeneration). Results will help doctors better understand how well patients can see.
Dallas, TexasAges 18 years+ - NCT07602595Recruiting
Understanding pain after childhood rheumatic disease or surgery
This study helps researchers learn how young adults (ages 14–26) who had rheumatic disease or orthopedic surgery as children experience pain over time. By understanding your story, the study may help doctors better support others facing similar challenges.
Cincinnati, OhioAges 14–26 - NCT07009847Recruiting
Study of the R21/Matrix-M malaria vaccine
This study looks at how well the R21/Matrix-M malaria vaccine works and how safe it is in children who received it. It compares children who got malaria (or died) to healthy children who also got the vaccine.
Bousse, Burkina FasoAges 5 months+ - NCT06954727Recruiting
Study on first-time right heart catheterization for lung blood pressure
This study is watching people who are having their first right heart catheterization to better understand and manage lung blood pressure problems. It may help doctors improve diagnosis and treatment for people with shortness of breath or suspected pulmonary hypertension.
BeijingAges 14 years+ - NCT06859515Recruiting
Long-term follow-up for wet AMD treatment
This study checks on the long-term safety and effects of a one-time treatment (EXG102-031) for wet age-related macular degeneration. It is only for people who already received that treatment in a previous study.
BeijingAges 50 years+ - NCT06252948Recruiting
Gut bacteria study for POEMS and related plasma cell disorders
This study looks at the gut microbiome (the bacteria living in your digestive system) in people with POEMS syndrome, multiple myeloma, MGUS, amyloidosis, and healthy household members. It may help researchers understand how gut health relates to these conditions.
Rochester, MinnesotaAges 18 years+ - NCT07744425Enrolling by invitation
Surgical imaging device study
This study tests a new camera that helps surgeons see tissues more clearly during surgery. It may help improve surgical precision and safety.
Palo Alto, CaliforniaAges 18–90 - NCT05445544Recruiting
Study of belly and baby microbes to improve preeclampsia screening
This study looks at tiny living organisms in pregnancy (and related body samples) to find better ways to screen for preeclampsia. By learning early warning signs, it may help doctors identify risk sooner during routine prenatal care.
Guangzhou, GuangdongAges 18 years+ - NCT07347574Recruiting
Early Alzheimer's detection study in Hong Kong communities
This study aims to find early signs of Alzheimer's in the community through blood tests and assessments. It's for people who can think clearly and agree to participate without major health issues.
Hong KongAges 60–75 - NCT06527872Recruiting
Study of belimumab for lupus kidney disease in real life
This study looks at how well belimumab (Benlysta) works in real-world settings for adults with lupus nephritis (kidney inflammation caused by lupus). If you started belimumab in the past 6–24 months, the researchers will review your medical records to see how your kidney health has changed.
Baltimore, MarylandAges 18 years+ - NCT06781034Recruiting
MRI appearance of brain bleeds in different small vessel diseases
This study looks at how different types of small blood vessel disease in the brain affect the appearance of a recent brain bleed on MRI. It may help doctors better understand and manage these bleeds.
Nîmes, GardAges 18 years+ - NCT02748226Recruiting
Study of artery procedures for leg artery disease outcomes
This study looks at results of a minimally invasive procedure done inside blood vessels (endovascular therapy) for people with painful or worsening leg artery disease. It uses both past (retrospective) and future (prospective) patient information to better understand outcomes.
SeoulAges 20 years+
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Common questions
- Are there clinical trials for observational study?
- Yes. Clin2 currently lists 839 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.