HLTB16H3 Lecture 4: Epidemiology

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Lec 04 epidemiology: epidemiology: study of distribution & determinants of disease frequency in human pops, epidemiology aims to, discover agent, host & environmental factors, determine relative importance of causes of illness, disability & death. Key terms: epidemic/outbreak: disease occurrence among a population that is in. Evaluate effectiveness of health programs & services excess of what is expected in a given time and place. Ex: epidemiology in action: cne foodborne illness outbreak, 2013, incubation period time b/w consumption & body showing symptoms, review epidemiology in review slide. Prevalence: incidence prevalence recovery (or) death/mortality. Comparing population characteristics: rates help us compare health probs among dif pops that include 2+ groups who differ by selected characteristic. Rate formula: to calculate rate need to determine frequency of disease which includes: Rate (%) = # of cases/pop @ risk x100. # of new cases of disease or injury during specific period/summed person- years of observation during time interval.

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