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
- NCT05625750Recruiting
Study of people diagnosed with fatty liver from not-too-much alcohol
This is an observational study for people diagnosed with nonalcoholic fatty liver disease (fatty buildup in the liver not mainly caused by heavy drinking). It may help researchers better understand this condition, especially how it shows up on tests and how people report relevant health information.
Changsha, HunanAges 18–75 - NCT05629104Recruiting
Predicting long-term outcomes after aortic valve procedure
This study follows people who have aortic valve treatment to better predict how they will do in the long term. It may help doctors understand what outcomes to expect after the procedure and improve future care.
UppsalaAges 18 years+ - NCT05696002Recruiting
Track outcomes after advanced pelvic cancer surgery
This study follows people who have advanced pelvic cancer surgery that removes more than one pelvic organ. It’s an observational study, meaning it mainly collects data to help improve how future surgeries and care are planned.
GlasgowAges Any age - NCT05752656Recruiting
Tracking outcomes after deep brain stimulation for Parkinson’s
This study follows people with Parkinson’s disease to see how their thinking, behavior, and movement change over time after deep brain stimulation. It may help doctors better understand what to expect from this treatment.
RomeAges 18 years+ - NCT05855889Recruiting
Study of care for babies with congenital CMV infection
This is an observational study that looks at how babies with congenital CMV infection are diagnosed and managed in real life. It may help doctors understand which care approaches are used and how they relate to outcomes over time.
LondonAges Up to 10 years - NCT05679284Recruiting
Study for retained needle fragments in people who inject drugs
This observational study looks at whether small pieces of drug-injection needles remain in injection sites. You may help by answering a questionnaire and getting X-ray images, which could improve how care and safety are handled for people who inject drugs.
TampereAges 18 years+ - NCT05926284Recruiting
Study of precision testing to guide treatment in advanced cancer
This study looks at how “precision medicine” testing on your tumor (or planning to do it) can help guide possible targeted treatments for advanced cancer. It is observational, meaning researchers mainly watch and record what happens as testing results become available.
BerlinAges 18 years+ - NCT05958901Recruiting
Study of pulmonary hypertension in everyday clinical care
This observational study is looking at people diagnosed with pulmonary hypertension to better understand how it behaves over time. You may help researchers by allowing repeated check-ins for years and sharing symptom and test information.
Guangzhou, GuangdongAges 20–70 - NCT05968417Recruiting
Study of new lab tests using blood or bone marrow samples for myeloma
This trial studies myeloma (and closely related blood disorders) by using extra blood or bone marrow samples for lab research. It aims to help discover new ways to understand or treat myeloma.
SuttonAges 18 years+ - NCT05984576Recruiting
Chemo and radiation for recurrent rectal cancer after prior pelvic radiation
This study looks at combining total neoadjuvant therapy (chemotherapy and radiation) for rectal cancer that has come back in the pelvis after earlier radiation. It aims to see if this treatment approach can help control the disease and improve outcomes in patients with limited spread that can potentially be removed or treated.
RomeAges 18 years+ - NCT05918510Recruiting
Blood and tumor study for virus markers in throat cancer
This study looks at virus-related markers and tiny gene regulators (microRNAs) in tumor tissue from people with certain throat cancers caused by human papilloma virus (HPV). It’s observational, meaning it does not change your treatment, but results may help doctors better understand these cancers and how they behave.
RomeAges 18 years+ - NCT06088927Recruiting
Long-term results of conduction system pacing
This study looks at how well a special type of pacemaker (conduction system pacing) works over time. If you've already had this procedure, joining could help doctors learn how to improve future care for people like you.
CaenAges 18 years+ - NCT06103916Recruiting
Testing the ADNEX model for ovarian tumors
This trial is testing how well a special ultrasound model (ADNEX) can predict whether an ovarian tumor is benign or cancerous. It helps doctors make better decisions, and it’s for people with complex ovarian tumors who speak Dutch.
Veldhoven, North BrabantAges 18 years+ - NCT06104007Recruiting
Genoss balloon for narrowed heart stents
This study follows patients who have already received a special drug-coated balloon (Genoss® DCB) to treat a re-narrowed heart stent. It aims to see how safe and effective the balloon is in the long term.
SeoulAges 19 years+ - NCT06093022Recruiting
Treatment options for breast cancer that has spread to the liver
This study looks at how breast cancer that has spread to the liver responds to different treatments, including surgery and medicines. The goal is to learn which approach works best for patients with this condition.
Rome, LazioAges 18 years+ - NCT02270476Recruiting
Study of how cystic fibrosis lung disease changes over time
This observational study follows children newly diagnosed with cystic fibrosis to understand how their lung disease develops. It may help doctors better predict disease course and choose the right timing for care.
Heidelberg, Baden-WurttembergAges Any age - NCT06143449Recruiting
Taiwan Diabetes Registry
This registry study collects health information from people with diabetes to help researchers better understand and improve diabetes care in Taiwan. It involves no new treatments or procedures.
TaipeiAges Any age - NCT06167629Recruiting
PSMA PET scan study for prostate cancer
This study uses a special type of PET scan called PSMA PET to better understand and track prostate cancer. The scan helps doctors see where the cancer is in the body and if treatment is working.
MilanAges 18 years+ - NCT07864025Recruiting
Better imaging for heart artery blockages in stable angina
This study uses advanced imaging techniques to look at the build-up inside heart arteries in people with stable angina. It aims to help doctors understand and treat these blockages more accurately.
LondonAges 18–79 - NCT05285735Recruiting
Safety study for IV artesunate during pregnancy
This study follows people who were pregnant while receiving IV artesunate to better understand the treatment’s safety for both the mother and the baby. It does not test a new treatment—it collects safety information from real-world care.
Piscataway, New JerseyAges 15–100 - NCT06236789Recruiting
Ifosfamide for men with advanced prostate cancer
This trial is studying whether the chemotherapy drug ifosfamide (given with mesna to protect the bladder) can help men whose prostate cancer has spread and is no longer controlled by hormone therapy. It is for men who have already tried the chemotherapy docetaxel.
SeoulAges 19 years+ - NCT04739319Recruiting
Study of age-related macular degeneration changes
This study looks closely at how age-related macular degeneration (AMD) develops and changes over time by taking detailed eye measurements. It may help researchers better understand disease progression, especially for people who already have AMD.
East Melbourne, VictoriaAges 18 years+ - NCT06291649Recruiting
Studying accidental poisoning in children
This study watches and learns from kids who accidentally get poisoned. It helps doctors better understand how to treat these emergencies and prevent them.
Bagno a Ripoli, FirenzeAges 1 month–16 years - NCT06292897Recruiting
Obesity and prostate cancer tissue study
This study looks at how obesity might affect prostate cancer growth. It uses tissue samples to understand the role of certain metabolites in the tumor, which could lead to better treatments.
MilanAges 18 years+
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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.