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
- NCT05089149Recruiting
Check how lung ultrasound helps manage heart failure congestion
This study looks at people with long-term worsening heart failure who are coming to the hospital for a planned visit, to see how checking “congestion” (fluid buildup) may guide care. It may help the team understand whether lung ultrasound can better assess who needs treatment changes.
Vandœuvre-lès-NancyAges 18 years+ - NCT05937334Recruiting
Long-term study of asthma in adults in China
This study follows adults with asthma over about 2 years to learn more about asthma and how people do over time. If you qualify, you’ll be asked to join regular visits and follow the study plan.
Beijing, Beijing MunicipalityAges 18 years+ - NCT05950698Recruiting
Study of obesity and bariatric surgery with mental and social factors
This study looks at how personal mental health and life circumstances relate to outcomes after bariatric (weight-loss) surgery. It may help the team understand what supports improve recovery and health after surgery.
Rio de Janeiro, Rio de Janeiro, BrazilAges 18–60 - NCT06011694Recruiting
The Jinling Cohort: a health monitoring study
This study tracks healthy adults in Nanjing over three years to see if routine checkups and blood tests can detect early signs of disease. Participants will give blood samples, fill out health questionnaires, and have yearly physicals.
Nanjing, JiangsuAges 45–75 - NCT05596357Recruiting
Study during hernia surgery to understand patient experience
This trial enrolls adults who are scheduled for planned hernia/abdominal wall surgery to learn more about patients’ experiences and follow-up through questionnaires. If you qualify and agree, your study participation may help improve how care is planned around surgery.
Colombes, Île-de-France RegionAges 18–79 - NCT05539040Recruiting
Testing why certain heart signals trigger atrial fibrillation
This trial studies abnormal electrical signals in the right upper heart chamber and how they relate to atrial fibrillation (AF). It may help improve how doctors target AF treatment during catheter ablation for people who have AF symptoms.
LondonAges 18–85 - NCT06065982Recruiting
Study of a method for placing a dialysis catheter (PREDICT)
This study watches how well a certain method (percutaneous) works for placing a peritoneal dialysis (PD) catheter, which is a soft tube used for a type of kidney dialysis. By tracking patients’ experiences before and after the procedure, the study aims to improve care for people with kidney failure.
BrusselsAges 18 years+ - NCT06032975Recruiting
Fighting fatigue with a patient-reported tool in ovarian cancer
This trial tests whether using a patient-reported outcomes tool can help manage fatigue during treatment for ovarian cancer. It aims to improve how you feel during therapy.
NaplesAges Any age - NCT03299179Recruiting
Female hormones and brain blood flow during MRI
This study checks how female hormones may change blood flow in the brain. You may be asked to undergo an MRI scan while hormone levels are assessed.
GhentAges 18–25 - NCT04792892Recruiting
Study of quality of life after new anal cancer diagnosis
This study looks at how people’s day-to-day functioning and quality of life change after an anal cancer diagnosis. It mainly enrolls adults recently diagnosed to understand outcomes early on.
GothenburgAges 18 years+ - NCT05449756Recruiting
Long-term follow-up for children from the TEMPO study
This study checks on children who already took part in the TEMPO study during their first year of life. It helps researchers understand how things turned out over time and uses your child’s earlier study information.
BeekAges 3–10 - NCT06127719Recruiting
Surgery wait time and knee replacement quality of life
This study looks at how waiting for knee replacement surgery affects your quality of life. It may help doctors understand how to improve care for people waiting for surgery.
Hoorn, North HollandAges 18–100 - NCT07855029Recruiting
Quality of life after hepatitis B treatment outcomes
This study looks at how different outcomes of chronic hepatitis B treatment affect patients' quality of life. It includes people who have been functionally cured, those still on treatment, those who relapsed, and healthy controls to compare.
GuangzhouAges 18–65 - NCT04993469Recruiting
Tracking genital comfort after gender-affirming surgery
This study asks people who are planning genital gender-affirming surgery to report how their genital sensitivity and sexual function feel afterward. It helps doctors understand what changes patients experience and improve follow-up care.
Ghent, East-FlandersAges 18–110 - NCT07854912Recruiting
Is craving a key sign of behavioral addiction?
This study looks at whether craving—a strong urge—should be a main symptom for diagnosing behavioral addictions like gambling, gaming, overeating, excessive screen use, or sex/pornography addiction. If you regularly do one of these behaviors, your experiences could help researchers improve how addictions are diagnosed.
BordeauxAges 18 years+ - NCT07853820Enrolling by invitation
Health literacy survey for nursing assistants
This study is developing a questionnaire to measure the health literacy of nursing assistants (people who provide daily care to patients). It aims to improve training and support for caregivers.
Xi’an, ShanxiAges 18–65 - NCT06223217Recruiting
New quality-of-life survey for leg artery disease patients
This study tests a new questionnaire (modified VascuQol) to measure how leg artery disease affects your daily life. It aims to create a better tool for doctors to track your symptoms and well-being.
Shanghai, Shanghai MunicipalityAges 18–90 - NCT06239909Recruiting
Adjustable sphincter for urine leakage after prostate surgery
This trial is testing an adjustable artificial sphincter called Victo to help men who leak urine after prostate surgery. It may improve bladder control and quality of life.
Ostrava, Moravian-Silesian RegionAges 18 years+ - NCT07854899Recruiting
Study of advanced retinal degeneration natural history
This study follows people with advanced retinal degeneration (RCD) to learn how the disease progresses over time. It does not test a new treatment, but the information may help design future treatments.
GhentAges 18 years+ - NCT04489199Recruiting
Join the Dijon stroke patient registry study
This study follows people who are already in the Dijon Stroke Registry and asks if they agree to participate. If you say yes, your information may be used to better understand stroke outcomes and care.
DijonAges 18 years+ - NCT07856394Recruiting
Adding a special type of radiation to standard palliative radiation
This study tests whether adding a special type of radiation to standard palliative radiation helps reduce symptoms like pain, shortness of breath, or bleeding. It's for people with tumors that can't be removed and are large.
Scottsdale, ArizonaAges 15 years+ - NCT07872670Recruiting
Virtual reality to help recovery after hip or knee replacement
This study uses virtual reality (a computer-generated 3D environment you wear a headset for) alongside your usual care to help with recovery after hip or knee replacement surgery. It may help reduce pain or improve how well you move after surgery.
Inverness, HighlandsAges 18 years+ - NCT05108948Recruiting
Study factors linked to better quality of life after spine surgery
This study looks at what helps adults with spinal deformity have a better quality of life one year after surgery. It may help doctors understand which patients benefit most and how to improve follow-up care.
BrugesAges 18 years+ - NCT05145725Recruiting
Surgery study for teens with scoliosis needing spinal fusion
This trial looks at a specific surgical technique for teens whose scoliosis is severe enough that doctors have recommended surgery. It may help doctors compare approaches and improve outcomes after spinal fusion.
BrugesAges 12–20
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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.