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
- NCT04120714Recruiting
tDCS brain stimulation for problematic internet gaming use
This trial tests whether a noninvasive brain stimulation method (tDCS) can help teens or adults reduce problematic internet gaming. It’s designed for people who meet diagnostic criteria for “pathological use of internet gaming.”
DijonAges 12 years+ - NCT04049890Recruiting
Questionnaire study for families managing a child’s chronic illness
This study asks families to fill out and review a questionnaire about how you are coping at home when a child has a long-term (chronic) health condition. It may help create a better tool to understand family adjustment during ongoing hospital treatment.
Florence, FirenzeAges Any age - NCT04343443Recruiting
Test whether a lung ultrasound helps discharge planning after heart failure
This study looks at people hospitalized for worsening heart failure with weaker pumping (reduced ejection fraction). It tests whether a lung ultrasound evaluation near discharge can improve how doctors decide it is safe to send you home.
Vandœuvre-lès-NancyAges 18 years+ - NCT03918421Recruiting
IgM-MAG neuropathy study using immunoglobulin M treatment
This study looks at a treatment made from immune proteins (immunoglobulin M) to treat neuropathy caused by anti-MAG antibodies. It may help improve nerve symptoms in people with this specific type of nerve condition.
BronAges 18 years+ - NCT04166409RecruitingPhase 3
Selumetinib versus chemo for low-grade brain tumor in children
This trial studies whether the targeted drug selumetinib works better than standard chemotherapy (carboplatin and vincristine) for children and young adults with a specific type of low-grade glioma (grade 1 or 2). It may help shrink tumors and slow growth while comparing side effects between the two treatment approaches.
Birmingham, AlabamaAges 2–21 - NCT03396341Recruiting
Surveys after genetic risk results for certain breast cancer genes
This study asks women to complete surveys after learning their genetic risk results for certain breast cancer–related gene changes. It helps researchers understand how people respond and what they think or feel after getting these results.
Boston, MassachusettsAges 25 years+ - NCT02924818Recruiting
Research study for adults with long-term breathing lung diseases
This study enrolls adults with chronic lung conditions like COPD, cystic fibrosis, bronchiectasis, or interstitial lung disease. It’s designed to learn more about these illnesses and to develop better ways to study or improve care.
ReimsAges 18 years+ - 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 - NCT02863172Recruiting
Genetic studies in families with inherited colon cancer
This study looks at genetic reasons some families get colon cancer due to inherited (run-in-the-family) syndromes. It may help doctors better understand risk and tailor care for you or your relatives.
Houston, TexasAges 18 years+ - NCT07666100Recruiting
Study of medication side effects in a periodontology clinic
This study looks at side effects from medications prescribed in a gum disease clinic. It aims to understand what types of side effects patients experience, which can help doctors choose safer medicines.
SivasAges 16 years+ - NCT07150546RecruitingPhase 1
Radiation and Peptide Therapy for Large Gut Neuroendocrine Tumors
This trial combines external radiation with a targeted radioactive drug (PRRT) to treat large, slow-growing neuroendocrine tumors in the gut that have spread and are not removable by surgery. It aims to see if this combination works better than either treatment alone.
Atlanta, GeorgiaAges 18 years+ - NCT03407469Recruiting
Study of taking blood thinners and quality of life in cancer clots
This study looks at how people with cancer-related blood clots in the leg or lungs do with anticoagulant (blood thinner) treatment over at least 3 months. It also tracks quality of life and healthcare use, which may help improve supportive care for patients.
Houston, TexasAges 18 years+ - NCT03659019Recruiting
Database study for implanted phrenic nerve stimulators
This study collects information about people with long-term breathing problems who may receive an implanted device that helps control breathing. It helps doctors better understand who benefits and how these treatments are used in real life.
Paris, Île-de-France RegionAges 5 years+ - NCT00992303Recruiting
Collecting tissue samples during radiation for people with cancer
This study collects tissue samples from people with cancer while they are getting radiation therapy. It also includes healthy participants, to help researchers compare samples and better understand cancer and treatment.
Dallas, TexasAges 18 years+ - NCT01072825Recruiting
Study for adults with gender incongruence not on hormone therapy
This study focuses on adults (18+) who are transgender and have not started hormone treatment yet. It aims to better understand gender incongruence and support care planning.
GhentAges 18 years+ - NCT06362538Recruiting
Heart health prevention program
This trial tests a program to help prevent heart problems in people who have not had a heart attack or stroke. It is for adults aged 30 and older.
Cotignola, RavennaAges 18–30 - NCT07660068Enrolling by invitation
HoLEP and Sexual Recovery
This study looks at how HoLEP surgery affects sexual function, particularly ejaculation. It's for men who are getting HoLEP to relieve bothersome urinary symptoms.
Chicago, IllinoisAges 18–100 - NCT06422052Recruiting
H. pylori infection and its treatment for stomach discomfort
This trial is for adults aged 18 to 80 who have a Helicobacter pylori (H. pylori) infection in their stomach and have never been treated for it. The study will look at how treating the infection affects symptoms like indigestion or stomach pain.
Chongqing, Chongqing MunicipalityAges 18–80 - NCT06369610RecruitingPhase 2
Less hormone therapy with radiation for prostate cancer
This trial tests whether some men with high-risk prostate cancer can safely receive less hormone therapy when combined with radiation. It aims to reduce side effects while still effectively treating the cancer.
Scottsdale, ArizonaAges 18 years+ - NCT06355713Recruiting
Symptom improvement after Essure implant removal
This study looks at women who are having symptoms from their Essure contraceptive implant and want it removed. It will measure how their symptoms improve after removal and may also include a special brain scan (MRI-PET) to check for changes.
AngersAges 35–75 - NCT05643859Recruiting
Fiber supplement study for bowel health and gut bacteria
This study tests whether adding a dietary fiber supplement can change the bacteria in your colon (gut microbiome). You may be asked to take the fiber supplement during evaluation for a non-cancer rectal condition.
Portland, OregonAges 18 years+ - NCT06430957Recruiting
Sleep apnea risk after dental surgery under general anesthesia
This study checks dental patients for the risk of sleep apnea before surgery and looks at whether that risk is linked to problems after general anesthesia. It may help you understand your own risk and improve safety.
KayseriAges 18–80 - NCT06226818Recruiting
Support for women experiencing sexual or domestic violence
This trial compares two types of care—women's centers versus traditional health centers—to see which better supports the mental and physical health of women who have faced sexual or domestic violence. It aims to find the best way to help women heal.
DijonAges 18 years+ - NCT06026423Recruiting
Stitching again vs. letting heal for perineal wound separation
This trial compares two approaches for women whose perineal stitches come apart after a second-degree tear or episiotomy: letting it heal on its own (conservative treatment) versus restitching. It aims to find which option leads to better healing.
HerlevAges 18 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.