Clinical trials
Questionnaire clinical trials
Below are recruiting questionnaire clinical trials, each written for real people, not researchers. We’re tracking 1,134 recruiting studies, each written for real people, not researchers, below.
Recruiting studies
- NCT06416293Recruiting
Improving breast cancer care with patient input
This trial aims to improve breast cancer care by working together with patients and doctors. It is for people with breast cancer or DCIS (a very early stage), and your input will help shape better care.
Augsburg, BavariaAges 18 years+ - NCT06370520Recruiting
Teen emotions screening after mild brain injury
This study screens teens aged 11 to 17 for emotional and mental health problems after a mild traumatic brain injury (mTBI, also called concussion or minor head injury). The goal is to find out if the hospital screening helps identify teens who may need extra support.
Sacramento, CaliforniaAges 11–17 - NCT06284382Recruiting
Early trauma and brain smell test study
This study looks at how early childhood trauma affects brain chemistry, specifically a chemical called dopamine, during smelling tasks. You will have brain scans and smell tests to see if your brain reacts differently.
BronAges 18–30 - NCT06244641Recruiting
New Model for Relapse in Alcohol Use Disorder
This study is testing a new way to understand and predict relapse in people with alcohol use disorder. If you're currently hospitalized for this condition, researchers want to learn from your experience to improve care.
Brussels, Brussels CapitalAges 18 years+ - NCT06227962Enrolling by invitation
Thinking and quality of life in retinoblastoma survivors
This study looks at how retinoblastoma and its treatment affect thinking skills and quality of life over time. It may help doctors better support survivors and their families.
Amsterdam, North HollandAges 6 months–35 years - NCT06221020Recruiting
Enhanced recovery after pituitary tumor surgery
This study tests a standard care plan to help patients recover faster after surgery to remove a pituitary tumor. It may reduce hospital stay and improve recovery.
Kaohsiung CityAges 20–75 - NCT06083636Recruiting
Better lab tests for people with hypothyroidism on levothyroxine
This study aims to improve lab tests for people with hypothyroidism who take levothyroxine. It compares their test results to healthy volunteers to see if doctors can make more accurate diagnoses.
Amsterdam, North HollandAges 18–100 - NCT06059313Recruiting
Personality study for people with memory or behavior changes
This study looks at how personality may have changed before the onset of different types of memory or behavior disorders (like frontotemporal dementia, Alzheimer's, or bipolar disorder). Researchers will talk with a family member or close friend who knew you well before the illness started.
NantesAges 18 years+ - NCT05945212Recruiting
Vibration therapy to help leg recovery after subacute stroke
This study tests whether a program using local vibrations on the muscles in the front of your ankle can improve leg nerve and movement recovery after stroke. It may help people who have weak ankle lifting during the weeks to months after stroke.
Le Chambon-FeugerollesAges 18–80 - NCT03642795Recruiting
French questionnaire study for people with rheumatoid arthritis
This study checks whether a French questionnaire about rheumatoid arthritis care answers works well. You may help by completing the survey if you have rheumatoid arthritis and meet medication and consent requirements.
BordeauxAges 18 years+ - NCT05651919Recruiting
Blood test study to understand diabetic heart weakness
This study measures immune cells from your blood to find markers (biomarkers) that may explain or predict diabetic cardiomyopathy, a type of heart condition linked to diabetes. You may benefit mainly by being closely monitored and contributing to research that could improve future diagnosis or risk tracking.
BronAges 40–85 - NCT05533645Recruiting
Questionnaire study about salt (sodium) intake
This study asks people to report how much salt they eat so researchers can better understand sodium intake in people with high blood pressure and/or advanced kidney disease. It may help improve how salt-related health risks are assessed, though it mainly involves questionnaires and scheduled participation.
LilleAges 18 years+ - NCT05448326Recruiting
Revisiting test results for children and adults without a diagnosis
This study re-checks earlier genetic testing for people who still do not have a diagnosis for a developmental or physical difference. It may offer new genetic testing (like genome sequencing) using new or stored samples to help find a cause when the first results were unclear or negative.
DijonAges Any age - NCT05293769Recruiting
Food diary questionnaire test for IBS and activity levels
This study checks whether a food questionnaire can reliably estimate what you eat, including certain carbs that can affect digestion (FODMAPs). It also looks at how the results relate to IBS symptoms and your self-reported physical activity.
Jette, Brussels CapitalAges 18–65 - NCT05207098Recruiting
Brain testing and questionnaires during head and neck radiation
This study checks how people’s thinking and brain functioning change while they are getting radiation therapy for head and neck cancer. It uses simple computer tests and questionnaires to better understand who may be at risk for trouble thinking during treatment.
Basking Ridge, New JerseyAges 18–89 - NCT04730622Recruiting
Studying muscle and bone changes after a hip fracture
This study looks at how bone health and muscle strength (“osteosarcopenia” — loss of both bone and muscle) change after a hip fracture in older adults. It may help doctors understand who is at higher risk and how to better support recovery after hip surgery.
BolognaAges 65 years+ - NCT04615988Recruiting
Vitamin D levels and hormone side effects from immune cancer therapy
This study looks at whether your blood vitamin D level is linked to hormone-related side effects caused by immune checkpoint cancer drugs. It may help doctors better predict who is at risk and how to monitor patients during treatment.
New York, New YorkAges 18 years+ - NCT04678167Recruiting
Special “ring” glasses for vestibular neuritis symptoms
This trial tests whether wearing “ring” glasses helps reduce symptoms from vestibular neuritis, a condition that causes spinning vertigo and balance problems. Participants may get the glasses being tested or look-alike placebo glasses (or not wear glasses), so the study can tell if the glasses truly help.
BrestAges 18 years+ - NCT04158180Recruiting
Questionnaire study for diastasis recti in adult women
This trial is testing and verifying a Spanish questionnaire about diastasis recti (a separation in the abdominal muscles). It may help by creating a tool that doctors and researchers can use to better understand symptoms and severity.
Plasencia, CáceresAges 18–65 - NCT03371641Recruiting
Study of alcohol exposure effects in unborn babies
This study looks at unborn babies exposed to alcohol during pregnancy and compares them with babies not exposed. Researchers test a pregnancy blood marker to see whether it may relate to early brain changes in the baby.
RouenAges 18 years+ - NCT03010150Recruiting
Blood tests and swallowing exercise check-ins for head and neck cancer
This study looks at whether giving swallowing exercises and checking in with questionnaires can help people with metastatic (spreading to neck lymph nodes) head and neck cancers do the exercises correctly. It also uses blood tests to better understand adherence and progress over time.
Houston, TexasAges 18 years+ - NCT02604563Recruiting
Aging, blood changes, and health in older adults
This study examines why some older adults develop changes in their blood cells that may affect their health. Researchers will look for links between these blood changes, aging, and common health problems in older people.
St Louis, MissouriAges 50 years+ - NCT07878286Recruiting
How body awareness relates to fibromyalgia symptoms
This study looks at how well women with fibromyalgia notice internal body signals (like heartbeat or breathing) and whether that affects their pain and other symptoms. It may help doctors understand fibromyalgia better and improve future treatments.
IstanbulAges 18–65 - NCT06028022RecruitingPhase 2
Reishi mushroom for fatigue and joint/muscle pain in breast cancer
This trial tests whether a reishi mushroom extract can help reduce fatigue and joint or muscle pain in people with breast cancer who are taking aromatase inhibitors. If you have these symptoms, you may be able to join.
Albert Lea, MinnesotaAges 18 years+
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Common questions
- Are there clinical trials for questionnaire?
- Yes. Clin2 currently lists 1,134 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.