Lien Quach, MD, PhD, was a postdoctoral research fellow at the CASI. ​Her research interests focus on the social determinants of health, specifically how social (dis)connection patterns relate to mental health, physical function, and quality of life in older adults. Her work seeks to understand the unique roles social isolation, network characteristics, and social support play in health outcomes in older adults, including people living with HIV/AIDS both in the United States and globally. She also has expertise in designing and analyzing surveys using survival analyses, generalized estimating equations, moderation, mediation analyses, network analysis, and measurement modeling.