POPM 4040 Lecture 2: POPM 4040 Lecture : Basic epi
22 Dec 2018
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Epidemiology: the systematic study and characterization of the frequency, distribution and determinants of health and disease in populations. Attack rate: proportion of exposed population who develop clinical signs of disease. In a commune of 2,622 haitians 64% (1,678) were exposed to vibrio cholerae. Of the people who were exposed, 466 developed diarrhea and 157 of those people required hospitalization for rehydration. Attack rate = cases / exposed = 466 / 1678 = 28% Attack rate: the frequency of disease in a foodborne disease outbreak for those exposed to a potential cause". Where cause = the most likely food with the pathogen (# of people who became ill) (# of people who were exposed) Exposed are those who who ate the food 4260 students ate hamburgers (exposed) of these, 480 students became ill with diarrhea. Attack rate = 480/4260 = 11% note: disease = clinical symptoms of disease. Measurement of disease frequency: count: last weekend, 100 uofg students had diarrhea 2.
