All clinical trials

The goal of this study is to determine the association between genotypes and diet. The weight and weight loss data are already available from the previously completed study called: A to Z Study - Benefits and Risks of Alternative Weight Loss Strategies - A Clinical Trial, which was performed from 2003-2005 at Stanford University. In the present study, Interleukin Genetics will obtain DNA samples from the previously enrolled study subjects to investigate genetic influence of the response to macronutrient compositions of low caloric diets to weight loss.

The objectives of the study were: To study risk factors for colonization and infection with antibiotic resistant bacteria among patients with severe IAI before and after antibiotic treatment and surgical intervention. To study species changes in the rectal flora among patients with severe IAI before and after antibiotic treatment and surgical intervention. To review guidelines for antibiotic use in participating units. To evaluate surgical antibiotic prophylaxis and treatment in relation to risk for colonization and infection with antibiotic resistant bacteria among patients with severe IAI To use the results from the study in the process of a more appropriate use of antibiotics in participating units and care of patients with severe IAI. To study the dynamics of extended-spectrum beta-lactamase producing and wild-type Enterobacteriaceae in patients with suspected severe intra abdominal infections before, during and after antibiotic treatment.

The goal of this research study is to learn if certain factors may affect cancer rates among African Americans. These factors include behavioral, social, and environmental factors including diet and physical activity, cigarette smoking, cancer screening, health care, neighborhood environment, and mental health.

Use 24hr Holter ECG, ultrasound and cardiac fibrosis markers in the chronic kidney disease patients

The proposed study is designed to evaluate the clinical contents of the e-SSRS-IVR with respect to 1.the intent of the instrument (assess face and content validity), 2. system validation with respect to programming integrity, 3. implementation feasibility in clinical ill and healthy patient populations, and 4. criterion/predictive validity to discriminate patient population with known clinical status differences.

Main intention of this study is to find out whether there is a difference between the attitudes towards opioid- substitution of opioid dependent patients under substitution with methadone, buprenorphine or without substitution and their therapists

Heat Intolerance (HI) is a life threatening deficiency that can lead to heat exhaustion, heat stroke (and possibly death) in a large number of military and civilian occupational groups. We have demonstrated malfunction of transcriptional pathways in the heat stressed HI phenotype and an altered gene expression profile compared to Heat Tolerant (HT) individuals. Such differences are evident even under normothermic basal/comfort conditions. Heat and exercise challenges during the heat tolerance test (HTT) further emphasize the differences between the groups, particularly during recovery at comfort temperatures. Our results indicate that it may be possible to identify markers of heat intolerance. To achieve this goal, we plan to design a cellular (lymphocyte) HTT experimental model and detect gene expression profiles using customized DNA microarrays and bioinformatic tools (the genes selected will be based on our previous DNA microarray studies). Lymphocyte samples collected from HT and HI individuals under resting/comfort conditions will be examined. Treatments and analyses are designed to reveal HI-associated gene-expression profiles (constitutive or inducible), and thereby find lymphocyte markers to identify individuals predisposed to heat injury. The identification of such subjects could prevent unnecessary loss of life. Notably, the rapidly changing climate in our era increases the number of occupation/age groups in which manifestations of HI will appear.

The purpose of this study is to implement and access a newly developed bladder filling protocol for patients receiving radiotherapy for rectal cancer using imaging on the treatment unit.

Trial of new work in progress (WIP) sequences in MRI.

This is a multi-center cross-sectional study in which the Real-time Tissue Elastography® measurements will be collected prospectively from patients with chronic hepatitis B or C virus presenting for liver biopsy.