Clinical trials
General Population (no Specific Condition or Disease) clinical trials
Below are recruiting general population (no specific condition or disease) clinical trials, each written for real people, not researchers. We’re tracking 10,548 recruiting studies, each written for real people, not researchers, below.
Recruiting studies
- NCT02418442Recruiting
Kid rheumatic disease registry study for follow-up care
This is an observational study that follows children and teens with rheumatic (joint/inflammatory) diseases to better understand how they develop and are cared for over time. You may help by letting the study contact your family in the future and by completing study tasks as needed.
Birmingham, AlabamaAges Up to 21 years - NCT02636517Enrolling by invitationPhase 1
Fecal microbiome transplant for repeat C. difficile infection
This Phase 1 study tests whether transferring healthy gut bacteria (a fecal microbiome transplant) can help children with repeated or moderate-to-severe C. difficile infection. It focuses on changing gut bacteria to reduce ongoing infection and symptoms.
Philadelphia, PennsylvaniaAges 3–21 - NCT02422875Enrolling by invitation
Study of immune markers in autoimmune disease and lupus
This study looks at blood and immune cell markers (autoantibodies and immune cell “signatures”) to better understand autoimmune conditions, including lupus. It may help researchers identify which markers are linked to disease and how immune cells respond after vaccination.
Atlanta, GeorgiaAges 18 years+ - NCT01989013Enrolling by invitation
CranioSacral therapy for people with Parkinson’s disease
This study looks at whether a hands-on therapy called CranioSacral Integrated Therapy can improve symptoms in people with Parkinson’s disease. If you have Parkinson’s, the goal is to see whether this treatment changes how you feel or function.
Ann Arbor, MichiganAges 18 years+ - NCT01351545Recruiting
Cryopreserved cord blood access program for transplant patients
This trial studies an organized way to obtain and distribute unlicensed (not FDA-approved for general use) stored cord blood units that have been frozen and kept. It may help people who need a cord blood transplant but don’t fit the “licensed cord blood only” options.
Birmingham, AlabamaAges Any age - NCT01496625Recruiting
Biobank study for retinal diseases and comparison samples
This study collects and stores blood and eye-related medical information to help researchers better understand retinal diseases, including age-related macular degeneration and diabetic retinopathy. Your samples may also be used to compare people with retinal disease to people without it.
Bethesda, MarylandAges 2–120 - NCT01432847Recruiting
Collecting eye-related samples to study eye diseases
This study collects samples like blood and a small skin biopsy (and sometimes urine, hair, or saliva) to better understand causes of eye diseases. The goal is to study eye conditions and may help researchers build better tests or treatments.
Bethesda, MarylandAges 1 day–120 years - NCT01399385Recruiting
New heart imaging to detect heart disease
This study tests new imaging techniques, like MRI and CT scans, to better see heart and blood vessel problems. It may help doctors find heart disease earlier and guide treatment.
Bethesda, MarylandAges 18–100 - NCT01805869Recruiting
Teeth removal study using leftover tissue for research
This study looks at people who need wisdom tooth (third molar) removal and collects the leftover tissue after extraction. The goal is to use these samples to help dental research, while making sure the procedure can be done safely.
Bethesda, MarylandAges 16–50 - NCT01568697Recruiting
Studying gum disease in people with immune and genetic differences
This study looks at how mouth bacteria and the immune system may work together to cause gum disease (periodontitis), especially in people with certain genetic immune problems. It may help researchers understand what drives severe gum disease and how to better monitor or treat it in the future.
Bethesda, MarylandAges 7–100 - NCT01682668Recruiting
Deep brain stimulation study for Parkinson movement problems
This study looks at how deep brain stimulation (an implanted brain device) affects Parkinson’s symptoms, especially movement problems like freezing, slowness, or involuntary movements. It may help people whose symptoms are not fully controlled by standard Parkinson medicines.
Paris, PARISAges 18–70 - NCT01633489Recruiting
LAL deficiency patient registry
This study keeps a protected record of people with Lysosomal Acid Lipase (LAL) deficiency to learn more about the condition over time. It may help researchers better understand how patients are doing and support future studies.
Phoenix, ArizonaAges Any age - NCT01665326Recruiting
Pompe disease screening and follow-up study
This study follows people with Pompe disease over time and checks their “CRIM status,” which is a lab result about a key protein. It may help researchers better understand the disease and how it progresses for different patient groups.
Durham, North CarolinaAges Any age - NCT01341327Recruiting
Study of treatment choices for left main artery narrowing
This observational study looks at people with a significantly narrowed “left main” heart artery and records treatment decisions and follow-up outcomes. It may help doctors better understand which care approaches work best for this condition in real-world practice.
ShanghaiAges 18 years+ - NCT01311323Recruiting
Testing heart procedures to fully open blocked coronary arteries
This trial compares different ways to treat serious heart artery blockages in people with a recent heart attack or unstable chest pain. It aims to see which revascularization approach works best when doctors think the heart arteries can be fully treated.
Chrzanów, MalopolskaAges 18 years+ - NCT01904851Recruiting
Registry for leg artery procedures and their outcomes
This study collects information about people who had a procedure to improve blood flow in certain leg arteries. It helps researchers understand which treatments work best and what outcomes to expect.
Little Rock, ArkansasAges Any age - NCT01460264Enrolling by invitation
A heart-and-lung health study following adults over time
This study follows adults with heart-and-lung health information over time to understand how these conditions change. It may help researchers find patterns that could guide better care in the future.
LundAges 45–75 - NCT02000895Recruiting
Studying birth factors in preterm and term mother-infant pairs
This study looks at how biological factors at birth differ between preterm and term babies, and how they relate to the mother and baby together. It may help doctors better understand early-life influences for newborn care.
Miami, FloridaAges Up to 10 years - NCT02040714Enrolling by invitation
Study of current treatments for Perthes hip disease
This study follows children (and teens) with Legg-Calvé-Perthes disease to learn about how today’s treatments work in real life. It may help doctors choose the best next steps for your child’s hip health.
Birmingham, AlabamaAges 1–18 - NCT01799915Recruiting
Study of causes and progression of synuclein-related nerve conditions
This study follows people over time to better understand “synucleinopathies,” which are conditions that affect the nervous system as it develops and progresses. You may be asked to return for visits and report symptoms, especially those that happen when you stand up.
Boston, MassachusettsAges 18 years+ - NCT01803906Enrolling by invitation
Tissue sample study for suspected mitochondrial disorders
This study collects tissue samples to help researchers learn more about mitochondrial disorders—conditions related to how the body makes energy. It may help by improving genetic understanding for families who suspect an inherited cause.
New York, New YorkAges Any age - NCT02038127Recruiting
Heart procedure outcomes tracking registry
This study collects information from people having a heart procedure called percutaneous coronary intervention, or PCI, to learn more about their outcomes and improve future care.
Chuncheon, Gangwon-doAges Any age - NCT01915511Recruiting
Long-term registry for new or worsening lung scarring
This study collects health information over time from people with newly diagnosed idiopathic pulmonary fibrosis (IPF) or other lung scarring diseases that are getting worse. It’s meant to better understand disease patterns and outcomes, which may help doctors plan future care.
Birmingham, AlabamaAges 21 years+ - NCT01694940Recruiting
Mitochondrial disease registry and sample collection study
This trial builds a large database and collection of lab results, and possibly tissue samples, from people with suspected or diagnosed mitochondrial conditions. It helps researchers learn more about these disorders and mitochondrial DNA changes, which may improve future diagnosis and treatments.
San Diego, CaliforniaAges Any age
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Common questions
- Are there clinical trials for general population (no specific condition or disease)?
- Yes. Clin2 currently lists 10,548 recruiting general population (no specific condition or disease) 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 general population (no specific condition or disease) 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 general population (no specific condition or disease) 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.