infectious disease epidemiology Flashcards
crude rate?
number of deaths/ population at risk
What happened between 1980 and 2000?
aids
Why can crude rate be misleading?
because different geographic locations have different types of populations (i,e more older people in florida than alaska)
How do you fix the problems involved with crude rate?
age adjusted rate
How is age specific rate different than age adjused rate?
you are only looking at a specific age group such as 0-4 year olds
proportionate mortality?
deaths due to cause x, time t divided by number of all deaths during the same time
What do you need to know to determine if a disease is worrisome?
case fatality rate
Which is more exact, a percentage or a rate?
a rate!
HOw do you find the relative mortality?
take rate exposed divided by rate unexposed
How do you find mortality diffference?
subtract rate exposed by rate unexposed
What is a PUI?
a person who touched something questionable in the last 21 days
What is the definition of legionnaires?
fever, myalgia, cough and pneumonia and has legionella
how do you define an incubation period?
time between exposure and onset of symptoms
attack rate?
of new cases among the pop during the period X 100 divided by population at risk at the beginning of the period
What is the definition of an attack rate
a measure of the probability or risk of becoming a case
What is a secondary attack rate?
cases among contacts of primary cases during the period X 100 divided by total number of contacts
What is the natural history of disease?
the unchecked progression of disease in an individual
What is this:
Permanent reduction to zero of the worldwide incidence of infection caused by a specific agent; intervention measures are no longer no longer needed.
eradication
What is this:
The specific infectious agent no longer exists in nature or the laboratory
extinction
