Clinical trials
Observational Study clinical trials
Below are recruiting observational study clinical trials, each written for real people, not researchers. We’re tracking 824 recruiting studies, each written for real people, not researchers, below.
Recruiting studies
- NCT06151028Recruiting
Menopause Symptoms in Women After Ovary Removal for Gynecologic Cancer
This study looks at menopause symptoms in women who have had their ovaries removed as part of gynecologic cancer treatment. It aims to understand how these symptoms affect patients over time.
Hefei, AnhuiAges 18–55 - NCT06308328Recruiting
Mucosal contouring study for oral pain from radiation
This study tests a new way to reduce mouth and throat pain caused by radiation therapy for nasopharyngeal cancer. It may help if you are currently getting radiation or chemoradiation and have mouth sores.
Guangzhou, GuangdongAges 18 years+ - NCT06334029Recruiting
Observing brain connections in epilepsy
This study is observing how the brain's connections and activity work in people with epilepsy. It uses MRI scans and EEG recordings to learn more about the condition, which may help improve future treatments.
Conegliano, TrevisoAges 6–65 - NCT06339255Recruiting
Observational study on CAR-T therapy for lymphoma
This study observes patients with certain lymphomas who are already eligible for standard CAR-T cell therapy in Italy. It aims to gather real-world information about how these treatments work.
MilanAges 18 years+ - NCT06169956Recruiting
Study of nivolumab with chemo before lung cancer surgery
This study looks at how well the immunotherapy drug nivolumab (Opdivo) works when given with standard chemotherapy before surgery for people with a certain type of lung cancer that has not spread. It may help shrink the tumor before surgery.
Kempten (Allgäu), BavariaAges 18 years+ - NCT06389552Recruiting
Long-term study of FOLFIRINOX after pancreatic cancer surgery
This study follows people with pancreatic cancer who are receiving a chemotherapy combination called FOLFIRINOX after surgery. The goal is to see how well the treatment works over time and how it affects long-term survival and cancer recurrence.
SeoulAges 19 years+ - NCT06397755Recruiting
Study of patients with prostate biopsy or prostate removal surgery
This study looks at patients who have had a prostate biopsy or surgery to remove the prostate (radical prostatectomy). It aims to learn more about these procedures and how patients are doing.
MilanAges 18 years+ - NCT06417502Recruiting
China pediatric rheumatic disease registry study
This study collects information from children with rheumatic and immune system diseases in China to better understand these conditions. By participating, you help researchers learn more about how to diagnose and treat these diseases.
Beijing, Beijing MunicipalityAges Up to 18 years - NCT07850882Recruiting
Virus injection plus immunotherapy for advanced colorectal, stomach, or liver cancer
This study tests whether a special virus injected directly into tumors can help your body fight cancer when combined with an immunotherapy drug. It is for people with advanced colorectal, stomach, or liver cancer that has spread and who have tumors that can be reached for injection.
Guangdong, FoshanAges 18–75 - NCT07850869Recruiting
Virus injection plus immunotherapy for advanced breast cancer
This study tests a new approach that combines a modified virus (H101) injected directly into the tumor with immunotherapy drugs that help your immune system fight cancer. It is for people with advanced breast cancer who have already tried standard treatments and could not continue chemotherapy.
Guangdong, FoshanAges 18–75 - NCT07852897Enrolling by invitation
Heel pads to prevent bedsores during surgery
This study looks at whether a special heel pad helps prevent bedsores (pressure ulcers) during and after surgery. You might be able to join if you're having planned surgery and will stay in the hospital for a few days.
DublinAges 18 years+ - NCT06425354Recruiting
Can breathing machine energy predict lung inflammation?
This study looks at a new measure called 'mechanical power' (the energy from the breathing machine) to see if it can predict inflammation in the lungs and blood of patients with low oxygen levels. It may help doctors better understand how the breathing machine affects lung damage.
RomaAges 18 years+ - NCT07841288Recruiting
Klebsiella pneumoniae infections in the respiratory ICU
This study looks at how common Klebsiella pneumoniae bacteria are in patients in the respiratory ICU. If you have this infection, the study may help doctors understand how many people get it and how it affects them.
SohagAges 18 years+ - NCT07833696Recruiting
Study of severe hives that don't respond to omalizumab
This study looks at people with severe hives (chronic urticaria) that have not improved with the usual dose of the medicine omalizumab. It aims to better understand these cases and how they are managed, which may help improve future care.
Besançon, Franche-comtéAges 18–80 - NCT07832929Recruiting
Alcohol injection for cervical disc herniation pain
This study tests a procedure where a special alcohol gel is injected into a damaged disc in the neck to relieve pain. It is for people with neck pain caused by a disc problem that has not improved with other treatments.
Vimercate, Monza E BrianzaAges 18–75 - NCT07811544Enrolling by invitation
Immune system study for sepsis-related kidney injury after surgery
This study looks at how the immune system responds in patients who develop sepsis after surgery and how it relates to kidney injury. It aims to help improve care for conditions like this.
Beijing, Beijing MunicipalityAges 18 years+ - NCT07813000Recruiting
Patient and doctor views on cell therapies for advanced cancer
This study is a survey to learn about what patients and doctors think about newer cell-based cancer treatments (like CAR-T or TIL therapy). You will answer questions about your experiences and preferences, which will help guide future research.
Hangzhou, ZhejiangAges 18 years+ - NCT05744466Recruiting
Compare two psoriasis medicines using real-world patient data
This study looks at how well two common plaque psoriasis medicines—deucravacitinib and apremilast—work in everyday care. It may help researchers understand which option performs better in real patients outside of a traditional drug trial.
Waltham, MassachusettsAges 18 years+ - NCT07795736Recruiting
Understanding growth hormone problems after brain injury
This study looks at how a traumatic brain injury might affect your body's growth hormone, which is important for energy, strength, and overall health. If you've had a brain injury and still have symptoms a year later, you may be able to help researchers learn more and possibly find better treatments.
Calgary, AlbertaAges 18–70 - NCT07799974Recruiting
Tracking fatigue and activity in lung cancer
This study follows patients with advanced lung cancer to see how fatigue and physical activity change during treatment. It aims to help improve support for symptoms like tiredness.
Ghent, Oost-VlaanderenAges 18 years+ - NCT07786818Recruiting
Colorectal cancer screening marker study
This study looks for markers in stool and saliva that might indicate the presence of precancerous growths in the colon. If you are scheduled for a colonoscopy, you may be able to participate by providing samples beforehand.
Bothell, WashingtonAges 18 years+ - NCT07787117Recruiting
Comparing asthma treatments: switching to a combination inhaler vs adding a daily controller
This study compares two ways to treat asthma: switching from a rescue inhaler (albuterol) to a combination inhaler (albuterol plus budesonide), versus adding a daily controller medication (either a low-dose inhaled steroid or a leukotriene modifier) while continuing albuterol. It aims to see which approach works better for people with asthma who currently use only a rescue inhaler.
Wilmington, DelawareAges 18–99 - NCT06219759Recruiting
Nerve Reconnection and Signals in ALS
This study looks at how nerves reconnect and send signals to muscles in people with ALS. It may help doctors understand the disease better and find new ways to treat it.
Aarhus, Central JutlandAges 18 years+ - NCT07777484RecruitingPhase 1
Study of TRB-001 vaccine for Parkinson's disease after prior immunotherapy
This study tests an experimental vaccine called TRB-001 in people with Parkinson's disease who have already received a previous immunotherapy targeting alpha-synuclein. The goal is to see if the vaccine is safe and how it affects the immune system and the disease.
ViennaAges 18 years+
Hear when a new Observational Study trial opens
We’ll email you when one opens — at most once a week, no account needed, unsubscribe anytime.
Common questions
- Are there clinical trials for observational study?
- Yes. Clin2 currently lists 824 recruiting observational study 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 observational study 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 observational study 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.