HSCI 130 Lecture 4: Epidemiology
28 Nov 2016
School
Department
Course
Professor
Document Summary
Epidemiology is the study of the distribution and determinants of health related states in specified populations, and the application of this study to control health problems. Person-time = healthy years of population at risk (total population - cases/immune/lost)(time frame) + cases[(time frame 1 x case 1) + ( )] + immune[(time frame 1 x immune 1) + ( )] + lost[(time frame 1 x lost 1) +( )] Prevalence = individuals affected by disease in population at given point in time. Cumulative incidence = new individuals who become afflicted with disease in a given time period (attack rate) Incidence = rate of development of disease in population. Importance of sufficient cause is illustrated by rothman"s pies. Criticism: does not take into account upstream factors that influence particular combinations of "sufficient causes" the cooks of the pies in the baking metaphor.
