# Shared Flashcard Set

## Details

EBM Quiz 3: Epidemiology
Epidemiology
12
Anatomy
03/23/2011

Term
 prevalence:
Definition
 number of affected people in population/ total amount of people in population
Term
 Prevalence is useful for assessing __ of disease within a population and is valuable for ___. It is NOT useful for determing what ___the disease.
Definition
 - burden- planning- NOT useful for determining cause
Term
 Incidence:
Definition
 (# of new cases of disease over specified period of time)/(# of persons at risk for disease over that period time )
Term
 With Cohort studies use ____ and ___ ___.
Definition
 incidence and relative riskCOIR
Term
 With case control studies, use ___and __ __.
Definition
 prevalence and odds ratio
Term
 A study in 2002 examined depression among persons with dementia. The study recruited 201 adults with dementia admitted to a long-term care facility. Of the 201, 91 had a prior diagnosis of depression. Over the first year, 7 adults developed depression. What is the incidence?
Definition
 (those who developed depression over first year)/(those at risk for developing depression the first year)7/(91+7)7/1100.064The one year incidence of depression amoung adults with dementia is 6.4%, this can also be expressed as 64 cases per 1000 persons with dementia
Term
 In 1999, a US state reported an estimated 253,040 residents over 20 years of age with diabetes. The US Census Bureau estimated that the 1999 population over 20 in that state was 5,008,863.Determine prevalence or incidence and calculate:
Definition
 - prevalence b/c time not involved253040/5008863= 0.051Prevalence is 5.1% in population or 5.1 cases per 100 or 51 cases per 1000.
Term
 High incidence represents disease with ___ ____, low incidence represents disease with ___ ___. This can be used to determine ___ of developing disease.
Definition
 - high occurence- low occurence- liklihood
Term
 Prevalence is a function of __ and ___ of disease.
Definition
 - incidence and duration
Term
 If no people die or recover, and incidence increases what happens to prevalence?
Definition
 it increases
Term
 If people die and recover at the same rate as people are coming down with illness, what happens to prevalence?
Definition
 stays the same
Term
 3 main types of observational studies:
Definition
 - cross-sectional study- cohort study- case-control study
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