HSS 4303 Lecture Notes - Lecture 14: Attributable Risk, Cumulative Incidence, Relative Risk
8 Nov 2018
School
Department
Course
Professor
Document Summary
Cohort ascertaining exposure, can be pro or retro; case-control ascertaining the outcome, mostly retrospective. Strength of association measured by relative risk (rr), odds ratio (or) and attributable risk (ar) Relative risk: incidence among exposed / incidence among the unexposed. Calculate cumulative incidence rate among exposed ie = a/(a+b) Calculate cumulative incidence rate among the unexposed io = c/(c+d) Ppl who are exposed are x times the risk of developing the disease compared to those who are unexposed. It is the incidence in the total population. ; percentage of cases that would be prevented if none were exposed: reduction in risk that would occur if everyone stopped being exposed, combined par guides policymakers; outcome can be caused by a number of exposures. Par can be computed for each exposure, individual pars can be combined into an estimate for the whole outcome; is one factor more responsible.
