Summary NR 503 Study Guide for Final Exam

1. Objectives Iof Iepidemiology a. Understand Ithe Iaetiology Ior Icause Iof Ia Idisease I(risk Ifactors) b. Find Iout Ithe Iextent Ithat Ia Idisease Ior Ihealth Iproblem Iaffects Ia Icommunity Ior I population c. Determine Ithe Inatural Ihistory Ior Iprognosis d. Evaluate Iexisting Iand Inewly Ideveloped Ipreventative Itherapeutic Imeasures Iand I modes Iof Ihealthcare Idelivery 2. Define, Icompare, Icalculate, Iand Iinterpret IMeasures Iof IMorbidity a. Incidence Irate: Imeasurement Iof Ithe Inumber Iof Inew Iindividuals Iwho Icontract Ia I disease Iduring Ia Iparticular Iperiod Iof Itime i. Calculation: INumber Iof Inew Icases Iof Idisease Ior Iinjury Iduring Ispecified I period IDIVIDED IBY ISize Iof Ipopulation Iat Istart Iof Iperiod b. Attack Irate: ISame Ias Irisk, Iproportion Iof Iindividuals Iin Ia Ipopulation I(initially Ifree I of Idisease) Iwho Idevelop Ithe Idisease Iwithin Ia Ispecified Itime Iinterval. i. Calculation: ITotal Inumber Iof Inew Icases IDIVIDED IBY IThe Itotal Ipopulation c. Prevalence: Imeasurement Iof Iall Iindividuals Iaffected Iby Ithe Idisease Iat Ia Iparticular I time i. Calculation: INumber Iof Inew Icases Iof Idisease Ior Iinjury Iduring Ispecified I period IDIVIDED IBY ITime Ieach Iperson Iwas Iobserved, Itotaled Ifor Iall Ipersons d. These Irates Iare Iused Ito Imeasure Idisease Ioccurrence Iand Imake Icomparisons Ibetween Ipopulation Igroups. IThey Iare Icommonly Iused Imeasures Ithat Ihelp Iour I understanding Iof Ithe Idistribution Iof Idisease Iin Ia Igiven Ipopulation. 3. Understand Iwhy Iincidence Idata Iare Iimportant Ifor Imeasuring Irisk. a. Incidence Iis Iimportant Ifor Imeasuring Irisk Ibecause Iit Itells Iyou Ithe Irate Iat Iwhich I new Ipeople Iare Icontracting Ithe Idisease