This course develops the methodologic concepts and principles of epidemiology introduced in the MPH Quantitative Core course. The material covered is intended to extend the student's understanding of the elements of study design, data analysis, and inference in epidemiologic research, including issues related to bias, confounding, and stratified analysis. The course consists of lectures and workshop sessions. The workshop sessions are designed to reinforce the concepts/topics covered in the lectures. This course is not appropriate for students who have completed EP813.