BIO 3124 Lecture Notes - Lecture 17: 18 Months, Susceptible Individual, Cumulative Incidence
Document Summary
Epidemiology - branch of medicine that describes the occurence, distribution. Infectious disease - disease caused by an infectious agent. Contagious diseases - caused by microorganisms that can be transmitted from one infected person to another . In uenza - the u ; direct - cold, cough transmitted through the air ; indirect - cold, cough on coffee table someone touches table gets cough. Transmissible disease - transmission by non-natural means from an infected person. Ci = number of new cases (cases occurred after the beginning of study) / number of individuals in the population (population at risk) Preexisting cases not considered for cumulative incidence but considered for prevalence. Incidence rate - measure of the accumulation of a disease over a period of time. Person-time at risk -amount of time a person at risk , can get sick and you"re going to study the person over a 1 year period it"s 1personyear ; 10 years is 10personyear ;
