HSS 4303 Study Guide - Midterm Guide: Total Variation, Attributable Risk, Relative Risk Reduction

• School: University of Ottawa
• Department: Health Sciences
• Course: HSS 4303
• Professor: Raywat Deonandan

Document Summary

Incidence: risk= new cases/ persons at risk (1 person in group of 6 gets flu; r=1/6. Cumulative incidence (incidence proportion): ff entire population to see how many new cases occur: calc=new cases/ persons at risk. Case fatality rate (cfr)- only relevant if get disease . #deaths/#diagnosed. Cause-specific mortality rate- #deaths from specific cause / # at risk. Years of potential life lost (ypll)- expected lifespan observed lifespan * ypll for a pop. for a dis. Point prevalence measures prevalence at a certain point. (cid:862)snap shot(cid:863); period prevalence measures prevalence during a certain period in time. Prevalence per 1,000= no. of cases of the disease / number of people in the population who do not have the disease a+b =total no. of ppl in pop. Nb: prevalence = incidence x duration of disease *when rates are stable *when in-migration = out-migration. Unit = x 1000: early mortality rate= tot.