Distribution and disease epidemiology, the study of determinants of injury, and other health outcomes in human populations (Rockett 1994). Clinical medicine, which at one time focused on improving the health of a person contrary to, epidemiologic analysis as a whole goal is to improve population health. Of course, if the population is improving the health of individuals, but fully described risk or protective factors as well as demographic data and links between health outcomes can be quantified. In addition, the role of public health programs and policies toward the population shift focus attention (Rockett 1994). Typically, two descriptive epidemiology ...