The Doctor of Philosophy (Ph.D.) degree program in epidemiology prepares students to effectively conduct epidemiologic research, apply epidemiologic principles and methods to address public health problems, and teach the discipline to others. The major research focus of our faculty has been the epidemiology of chronic diseases linked to exposures such as tobacco use, air pollution, and diet. Studying the effects of diet on health and disease risk in populations is a particular strength of our program. The curriculum is designed to establish competence in classical and modern epidemiologic methods, to promote successful learning and application of emerging methods, and to prepare the graduate for successful interdisciplinary research collaboration with public health and medical professionals, nutritionists, biostatisticians, bioinformaticians, and biological scientists. 3 to 5 years (12 to 20 quarters)