Written for those who are familiar with the basic strategies of analytic epidemiology, this book takes readers through a more rigorous discussion of key epidemiologic concepts and methods such as study design, measures of association, research assessment, and more. This thorough revision features end-of-chapter exercises as well as an entirely new chapter devoted to issues related to the interface between epidemiology, health policy, and public health, such as Rothman's causality model, proximal and distal causes, and Hill's guidelines. Careful attention is also given to sensitivity analysis, meta-analysis, and publication bias.