227 Studies Now Enrolling
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Displaying 201 - 213 of 213
Condition: Healthy Volunteers
Investigator: Paula Castano, MD, MPH
Status: Closed
Do You Have a Mirena IUD? You may qualify for a study on the extended use of the Mirena IUD! You may qualify if you are 18 to 33 years old and had your Mirena placed in 2013. Compensation available for time and effort. Find out if you qualify!
Condition: Healthy Volunteers
Investigator: Richard Sloan, PhD
Status: Closed
The purpose of this study is to examine the effect of dietary flavanols on brain activity and memory. Flavanols represent a specific group of plant derived nutrients that are found in cocoa beans, grapes, tea, berries and various other fruits and vegetables. The specific flavanols investigated in this study come from cocoa. Participants will be asked to…
Condition: Gastrointestinal and Digestive Diseases / Barrett's Esophagus
Investigator: Julian Abrams, MD
Status: Closed
The purpose of the study is to compare two types of endoscopic treatments in patients with Barretts esophagus (BE) with abnormal cells (dysplasia); radiofrequency ablation (RFA) and hybrid argon plasma coagulation (H-APC). H-APC is a newer technique in the treatment of BE and has not been adequately studied and is not approved by the FDA for routine use.…
Condition: Healthy Volunteers
Investigator: Jonathan Posner, MD
Status: Closed
Children with Attention-Deficit/Hyperactivity Disorder (ADHD) are typically treated with two types of medications: stimulants and non-stimulants. These medications work in different ways to treat ADHD symptoms, but we do not fully understand the brain mechanisms underlying the medications' effects. This study will use MRI scanning to look at changes in…
Condition: Healthy Volunteers
Investigator: Marie-Pierre St-Onge, PhD
Status: Closed
The overall goal of this project is to determine whether short sleep duration is a risk factor for cardiovascular disease in women. We are currently looking for healthy, non-smoking women to participate in a sleep study. You must be willing to come to Columbia University Medical Center once a week for two 6-week periods and regularly sleep at least 7-9…
Condition: Healthy Volunteers
Investigator: Moise Desvarieux, MD, PhD
Status: Closed
We are looking for people ages 65 and older to help us evaluate if an investigational drug improves muscle function, which can reduce risk of falls and fractures. To be considered for the study, you: 1. Must complete a pre-screening phone interview to assess your eligibility 2. If you are eligible, you will be invited to attend an in-person appointment at…
Condition: Gastrointestinal and Digestive Diseases
Investigator: Simon Lichtiger, MD
Status: Closed
The purpose of this clinical research study is to test the effects of an investigational (being tested) study medication, GED-0301, in order to find out if GED-0301 can or cannot improve the symptoms of Crohns disease. The study will test 2 doses of GED-0301 compared to placebo. The placebo is a dummy pill that contains no study medication (or GED-0301),…
Condition: Healthy Volunteers
Investigator: Magdalena Sobieszczyk, MD
Status: Closed
We are working on a new HIV vaccine study that builds on past success and other ongoing studies. This new study is called HVTN 120 and is testing a vaccine for HIV prevention. The Thai Trial has been the only study where the vaccines were partially protective in preventing HIV. We learned a lot from that study, and are now improving on next generation of…
Condition: Healthy Volunteers
Investigator: Karen Marder, MD, MPH
Status: Closed
This study is recruiting people who have a family history of a neurodegenerative diseases, such as Alzheimer's disease or other form of dementia including frontotemporal dementia and prion disease, who are interested in doing predictive genetic testing. Participants will complete questionnaires prior to testing and then 1 month and 6 months after…
Condition: Healthy Volunteers / Exercise
Investigator: Richard Sloan, PhD
Status: Closed
This study focuses on the effects of aerobic conditioning on cardiovascular function and inflammatory response. Eligible participants will complete an exercise stress test, laboratory visit, and cognitive testing session at three specific time points over the course of the study. Once the initial set of appointments is complete, participants are randomly…
Condition: Healthy Volunteers
Investigator: Jeffrey Miller, MD
Status: Closed
The purpose of this study is to use Positron Emission Tomography (PET) to identify changes in brain chemistry that may cause an episode of depression. This study will be carried out in approximately 30 subjects. PET is a technique that provides "pictures" of chemical connections in the brain by injecting and monitoring a radioactive substance. In…
Condition: Healthy Volunteers
Investigator: Richard Sloan, PhD
Status: Closed
The purpose of this research study is to determine whether ambulatory monitoring of blood pressure measured by a finger touch blood pressure monitor is a viable approach to measuring blood pressure in the field. A secondary aim is to determine whether the finger touch blood pressure monitor is influenced by individual differences in current stress levels…
Condition: Healthy Volunteers
Investigator: Daphna Shohamy, PhD
Status: Closed
The Learning Lab at Columbia University is conducting computer based behavioral studies to address fundamental questions regarding the nature of learning, memory, and decision making. Specifically, we will use behavioral methods to investigate the extent to which learning, memory and decision making may be modulated by factors such as novelty, trial-by-…