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Lecture 4- Frequency and association measures

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Frequency measures

what are they?
what kind of frequency measures are epidemiologists interested in?

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Terms in this set (19)

Frequency measures

what are they?
what kind of frequency measures are epidemiologists interested in?

frequency of an outcome as a function of determinants

interested in:
1. changes in frequency of outcome within a population
2. differences in frequencies of outcome btwn populations

Prevalence vs incidence

Prevalence: # of total (existing AND new) persons with an outcome in a given population at a certain time
reflects both incidence and duration of the disease
can be point prevalence or period prevalence

Incidence: # of new persons/cases developed within a given population in a given period of time

In 2019 among a total of 750,000 men 65+, 350,000 use an antidiabetic drug.
What is the prevalence of the use of an antidiabetic drug in
persons over 65 years of age in 2019?

350,000/750,000= 46.7%

or 467/1000 men 65+

Prevalence doesn't vary a lot over time if the __________ is not changing.

Most notable variations in prevalence rates for chronic diseases are the result of _______ __________.

incidence

external intervention (i.e. guideline changes)

For acute diseases, prevalence rate is usually higher/lower/equal to incidence rate?