Dr. Ren's research area is biostatistics. He is particularly interested in longitudinal data modeling, multilevel modeling, structure Equation modeling, and novel statistical methods application in the health sciences. Dr. Ren has collaborated as principal investigator and co-investigator/biostatistician on a number of research projects with either intramural or extramural funding in the health sciences. Dr. Ren's independent research focus on epidemiology and statistics in aging, gerontology and Alzheimer disease-related dementia (ADRD) using large national databases. Dr. Ren is a member of ADRC statistician methodology working group at the University of Pittsburgh.