Clinical trials
Questionnaire clinical trials
Below are recruiting questionnaire clinical trials, each written for real people, not researchers. We’re tracking 1,163 recruiting studies, each written for real people, not researchers, below.
Recruiting studies
- NCT06368817RecruitingPhase 2
Lower radiation dose for children with CNS germinoma
This trial will see if giving a lower dose of radiation therapy can still effectively treat children and young adults with a type of brain tumor called germinoma. The goal is to reduce side effects while keeping the cancer under control.
Mobile, AlabamaAges 3–29 - NCT07488364Recruiting
Understanding frailty in Parkinson's disease
This study looks at why some people with Parkinson's disease become physically frail. It aims to find factors that may help predict or prevent frailty.
Istanbul, TurkeyAges 40–85 - NCT07488351Recruiting
Self-kindness and confidence in Parkinson's: symptoms, function, quality of life
This study looks at how self-compassion and self-belief affect symptoms, daily function, and quality of life in people with Parkinson's disease. It aims to help researchers understand how emotional well-being relates to physical health.
Istanbul, TurkeyAges 40–85 - NCT06184750RecruitingPhase 2
Finding the best tamoxifen dose to lower breast cancer risk
This trial tests different doses of tamoxifen to find the best one for lowering breast cancer risk in premenopausal women. It aims to see if a lower dose works as well as the standard dose with fewer side effects.
Tucson, ArizonaAges 18–55 - NCT03052283Recruiting
Abdominal symptom score test for people with cystic fibrosis
This trial helps create and check a patient-friendly questionnaire that measures abdominal (belly) involvement in cystic fibrosis. It may help your care team better track symptoms over time.
Brandenburg an der HavelAges Any age - NCT03067181RecruitingPhase 3
Active surveillance and chemotherapy for germ cell tumors
This study looks at how to manage germ cell tumors in children and young adults using careful monitoring for some patients and chemotherapy for others. It aims to see whether these approaches can control the cancer while avoiding unnecessary treatment when possible.
Birmingham, AlabamaAges Any age - NCT03114462RecruitingPhase 1
Study of focused radiation for laryngeal cancer
This Phase 1 study tests a precise type of radiation treatment for people with certain stages of laryngeal (voice box) squamous cell cancer. The goal is to see how safe the treatment is and how well it may work in shrinking or controlling the cancer while aiming to preserve the larynx.
Houston, TexasAges 18 years+ - NCT03145077Recruiting
MRI test to diagnose jaw bone damage after head and neck radiation
This study uses special MRI scans with contrast to better detect osteoradionecrosis (jaw bone injury) after radiation for head and neck cancer. If you qualify, the scans may help your team diagnose problems earlier and choose the right next treatment.
Houston, TexasAges 18 years+ - NCT03199651Recruiting
Study for people with stage IV lung cancer
This study focuses on improving outcomes for people with stage IV non-small cell lung cancer by gathering health, treatment, and lifestyle information. It may help researchers understand what supports survival and care planning, especially for people who are current smokers or recent quitters.
Columbus, OhioAges 18 years+ - NCT03207854Recruiting
Donate blood and immune samples for cancer, blood, or healthy volunteers study
This study collects blood and immune-related samples from people with cancer, certain immune-related blood conditions, or healthy volunteers. It helps researchers understand immune changes and may support future diagnosis or treatments.
Los Angeles, CaliforniaAges 19 years+ - NCT03323216Recruiting
Testing heart-related blood markers in people with diabetes and heart failure
This study looks for blood markers that may help explain or predict heart problems in people who have type 2 diabetes and heart failure. To join, you may also need to be having a planned heart procedure where doctors can collect study information.
Aachen, North Rhine-WestphaliaAges 18 years+ - NCT03332966Recruiting
Study of teens’ experiences in mental health care
This study looks at how young people experience mental health clinic care and how that relates to health outcomes. You may be invited if you are starting care in an adolescent mental health clinic.
HelsinkiAges 15–18 - NCT03335644Recruiting
Internet-based health study for people 15 and older
This study gathers health information through an online program. It may help researchers understand how diet and lifestyle affect health over time.
Bobigny, Seine Saint DenisAges 15 years+ - NCT03398161RecruitingPhase 2
Very low-dose skin radiation for mycosis fungoides spots
This trial tests whether ultra low-dose radiation can control specific skin lesions from mycosis fungoides (a type of lymphoma that affects the skin). It may help shrink or control targeted spots while using a lower radiation amount.
Houston, TexasAges 18 years+ - NCT03408353Recruiting
MERIT study uses mammogram and blood tests to assess breast cancer risk
This study looks for signs in blood samples and imaging that may help estimate breast cancer risk earlier. You would do a mammogram and give blood at the start and then again at yearly follow-up visits.
Houston, TexasAges 25–80 - NCT03418038RecruitingPhase 2
Vitamin C with chemotherapy for certain relapsed blood cancers
This Phase 2 trial tests whether intravenous vitamin C (ascorbic acid) added to chemotherapy can improve outcomes for people with certain relapsed or treatment-resistant lymphomas or chronic myelomonocytic leukemia (CMML). It may help by boosting chemotherapy’s effectiveness and/or changing how the cancer responds.
Mankato, MinnesotaAges 18 years+ - NCT03465774Recruiting
Doxycycline added to a chest drain for cancer fluid buildup
This trial studies whether adding an antibiotic called doxycycline to an indwelling chest drain improves symptoms and fluid control in people with cancer-related fluid around the lungs. It’s mainly for patients who are getting this drain placed and can complete brief symptom check-in questions.
Houston, TexasAges 18 years+ - NCT03478553Recruiting
Study of genes in people with pulmonary fibrosis
This study looks at genetic (inherited) factors related to pulmonary fibrosis, especially idiopathic pulmonary fibrosis (IPF). It may help researchers understand why some families are more affected and could guide future testing or treatments.
Aurora, ColoradoAges 18 years+ - NCT03592563Recruiting
Brain health follow-up study for adults
This study follows adults over time to better understand brain health and brain-related conditions. You may join if you already have certain neurological or psychiatric diagnoses, are at higher risk, or simply want to help research on maintaining brain health.
Hong KongAges 18 years+ - NCT03594630RecruitingEarly Phase 1
Watchful waiting then chemotherapy before surgery for rectal cancer
This trial studies whether a period of active surveillance (watching closely) and chemotherapy before surgery can improve outcomes for people with stage II–III rectal cancer. You would also receive standard chemo-radiation if you qualify, then proceed to surgery.
Houston, TexasAges 18 years+ - NCT03667417Recruiting
Study of people with BRCA1/BRCA2 cancer gene changes
This study follows people who carry a harmful BRCA1 or BRCA2 gene mutation, whether or not they currently have breast or ovarian cancer. The goal is to better understand cancer risk over time and how being a carrier may affect screening and care.
MarseilleAges 18 years+ - NCT03696134Recruiting
Study of musculoskeletal health, frailty, pain, and disability
This study looks at musculoskeletal health and wellbeing in adults, especially people who are frail or at risk of developing frailty-related problems like pain or limited ability to move. It may help researchers understand what puts people at risk and what could improve comfort and function.
NottinghamAges 18 years+ - NCT03750227RecruitingPhase 3
Radiation before or after brain tumor surgery
This study compares giving focused, high-precision radiation before or after surgery for brain metastases. It aims to see which timing works best to control tumors and improve outcomes.
Scottsdale, ArizonaAges 18 years+ - NCT03750513RecruitingPhase 1
Tested improved radiation targeting for children with ependymoma
This early-phase study tests a more precisely targeted type of radiation for children with ependymoma, aiming to treat the brain tumor more accurately. It may help reduce how much healthy tissue gets radiation, and researchers are checking safety and best dosing.
Boston, MassachusettsAges Up to 22 years
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Common questions
- Are there clinical trials for questionnaire?
- Yes. Clin2 currently lists 1,163 recruiting questionnaire 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 questionnaire 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 questionnaire 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.