Prevention Research Center In the Department of Medicine

Postdoctoral Fellows

Postdoctoral Fellow Research Interests  
 
Banda, Jorge A., PhD Dr. Banda's research aims to design, test, and disseminate creative solutions for child physical activity in after-school settings.  His work emphasizes innovative data analysis methods with current generation triaxial accelerometers to rigorously evaluate interventions and to explore relationships between sleep, sedentary behavior, physical activity, and health among youth. Contact Info
 
Hartle, Jennifer C., DrPH, MHS, CIH Dr. Hartle's research investigates environmental exposures and their effects on human health, with a special focus on environmental exposures from the food system. Her research interests are in exposure science, risk assessment, and environmental epidemiology and how they can be used to inform environmental health and food system policy.  Jennifer's doctoral research at Johns Hopkins focused on identifying inequities in dietary environmental exposures. For her dissertation, she examined bisphenol-A (BPA) exposures in the food system to determine vulnerable populations and to develop exposure prevention strategies. Dr. Hartle's current research projects explore environmental endocrine disrupting chemicals and obesity. Contact Info
 
Hauser, Michelle, MD, MPA Dr. Hauser is board certified in internal medicine and completed medical school, internal medicine residency and a master of public administration at Harvard. She is also a certified chef via Le Cordon Bleu. Her research interests blend her training in medicine, public policy, nutrition and culinary arts. They include: community-based participatory research (CBPR) utilizing lifestyle change interventions for those in underserved communities with, or at risk of, diabetes, cardiovascular disease and obesity; weight loss; access to healthy foods and safe places to exercise; teaching nutrition and cooking skills to increase intake of plant-based foods; and increasing access to medical care for the underserved. Contact Info
 
Johnson, Catherine Brown, PhD As a linguist with in-depth public health communication training as well as interdisciplinary industry experience, Cati Brown-Johnson PhD brings a unique perspective to the Stanford Research Prevention Center. Brown-Johnson’s current research agenda is two-fold: evaluation and utilization of social and mobile media within the sphere of public health and tobacco control, and investigation of tobacco-related stigmas (lung cancer stigma, smoking stigma) including pilot trials of technology-based stigma reduction and health care communication interventions. Under those umbrellas, Brown-Johnson is exploring public sentiment towards gun control using a dataset of 80,000 New York Times comments, investigating information contagion for health-related messages shared on Twitter, developing and partially crowdfunding a mobile iPad game to increase positive communication between lung cancer patients and providers, and prototyping a text-based (SMS) intervention for patients aimed at increasing social connection and decrease health-related stigma. Prior to joining SPRC, Brown-Johnson spent two years at UCSF’s Center for Tobacco Control Research and Education as a NIH-funded postdoctoral fellow. After her graduation in 2006 from the University of Georgia, Brown-Johnson worked in search technology and social program evaluation start-ups in San Francisco and the Bay Area. As a linguist and social science researcher, Brown-Johnson is fundamentally curious about the way we use language to create change in our lives and in public health. Contact Info
 
Laddu, Deepika, PhD Dr. Laddu's research interests include physical activity, and nutrition as it relates to body composition and bone health. The focus of her dissertation included examining the longitudinal effects of total body and regional adiposity (i.e., abdominal fat, skeletal muscle fat content) on changes in bone strength and development in young females. The underlining purpose of her study was to examine whether obese children are more at risk or are protected from impaired bone development and bone-related injuries compared to their normal weight peers, and whether this relationship can be explained by their individual soft-tissue composition (e.g., fat mass, skeletal muscle mass). Dr. Laddu is currently working with Dr. Marcia Stefanick to investigate the relationship between aerobic exercise and regional adiposity (i.e., abdominal-viscera, skeletal muscle fat) on cardio-metabolic risk and bone health in post-menopausal women, with and without breast cancer. Subsequent focus will include the use of novel imaging techniques (HRpQCT; DXA) to better capture visceral adiposity and skeletal muscle fat infiltration in aging individuals belonging to the Women's Health Initiative and MrOS trials. Contact Info
 
Offringa, Lisa, PhD Dr. Offringa's postdoctoral research focuses on plant-based foods and remedies to prevent disease.  Whether to treat specific issues, or to improve general health, incorporating wellness-building phytochemicals into the diet is a primary goal of Lisa's work at Stanford.  Her projects include measuring the physiological effects of diet and plant intake in a large clinical weight -loss trial, investigating the health benefits of traditional diets around the globe to impact international nutrition policies and coordinating a study on the effect of diet on the human intestinal microbiota.  As part of her NIH sponsored Institutional Research and Development Award, she is teaching Plant Morphology and Physiological Ecology at San Jose State University this year.  Lisa is also active in public outreach, from instructing middle school students about plant-based medicines to guiding Stanford employees in ways to eat more plant foods.  Dr. Offringa's dissertation research through The New York Botanical Garden investigated medicinal plants from Northern Thailand used by traditional healers to treat memory disorders in the elderly by applying a combination of anthropological, botanical, phytochemical and pharmacological methods.  She was trained as a plant organic chemist and field botanist at San Francisco State University.  At the core of her career as a researcher and educator is the preservation of biocultural diversity by emphasizing the importance of plants used for food and medicine, and raising awareness of the connection between of our food systems, our personal health and the environment Contact Info
 
Sanders-Jackson, Ashley, PhD

In general, Dr. Sanders-Jackson is interested in the way message features affect information processing and sharing (from the Twitter to the corner store) to affect health-related attitudes and behaviors.  She is currently completing research in three areas.  These are the message features that affect processing of health-related information, social media and tobacco interventions and the effect of policies and environmental exposures on norms and behavior in the context of tobacco.  Dr. Sanders-Jackson is also completing the second year of a postdoctoral fellowship grant from the state of California Tobacco Related Disease Research Program in which she is collecting data on the willingness of LGBT young adults to utilize a socially mediated smoking cessation forum. Dr. Sanders-Jackson has published papers in Tobacco Control, American Journal of Public Health, Journal of Computer Mediated Communication and Health Communication, among other journals. She has also presented at numerous academic conferences and meetings.

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Oppezzo, Marily, MS, RD, PhD

As a Registered Dietitian, Masters in Nutritional Science, and PhD in Educational Psychology with a focus on motivation, Dr. Oppezzo's multi-disciplinary background and experience bridges compatible disciplines and perspectives on behavior change. Marily's current project investigates the use of online social support systems to facilitate weight loss. Another line of her work investigates how the physical and structural environment can influence cognition and motivation. Under this umbrella, one research thread explores how physical movement influences cognition, specifically how walking improves creative thinking. The second thread focuses on how personally structuring one's environment can improve motivation towards habit changes.

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White, Justin, S. PhD, MA, MSPH Applies theory from health economics and behavioral economics to understand health-related behavior in low-income settings, with a focus on tobacco use in the developing world; uses experimental and quasi-experimental methods to evaluate the effects of policies and interventions on health outcomes; studies behavioral responses to monetary and social incentives for health products. Contact Info

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