Preface
The main goal of public health is to prevent and control disease in human populations. To reach this goal, we attempt to understand the nature of diseases, explore the causes of diseases, take action (public health programs) and evaluate the effectiveness of the actions. Epidemiology plays a crucial role in realizing this goal and deciding which public health programs to develop as well as in evaluating those programs.
In recent decades, it appears that epidemiology has increasingly become a very important approach, not only for public health but also for clinical medicine and other areas of medical research and practice. Advances in computer design and availability and the development of advanced statistical methods and readily accessible powerful software have made it feasible to manage and statistically analyze very large databases. Epidemiological techniques have been applied to many areas of biomedical research and as a result, quite a few branches of epidemiology have emerged. Today, you might find epidemiologists who specialize in chronic disease or infectious disease epidemiology or in genetic epidemiology or in molecular epidemiology or in pharmacoepidemiology or nutritional epidemiology, to name only a few of the specialties.
The aim of this book is to provide an overview of principles of epidemiology for students of clinical medicine. It is also usable for the students of other health professions such as nursing, dentistry, pharmacy, public health service etc. It also can be used as the reference book for other health professionals. For medical students, this book assumes that they have successfully finished a short course of medical statistics.
In this textbook, most of the chapters in Part one are concentrated on the basic principles concepts and methodology of epidemiology (first 10 chapters). The remaining chapters in the second part consist of some applications of epidemiology. These may be selected by instructor for lecture or for used by students as selfª²readings.
It is important to note that this textbook just serves as an introduction of epidemiology. Because of the obvious constraints of any single textbook, it does not comprise an exhaustive answer to many questions in epidemiology. I would appreciate any suggestions on what and how the contents of this book can be improved.
Wang Peishan
Department of Epidemiology and Biostatistics
School of Public Health
Tianjin Medical University
Tianjin, China
psw@tijmu.edu.cn
October 2014