Fundamental Epidemiological Concepts (Person, Place, Time (WHERE is it…
Fundamental Epidemiological Concepts
The fundamental starting point of detecting disease occurrence is the identification of a case or cases of the disease.
does not intervene or manipulate the exposure of interest
in the study.
We are simply ‘observing’ what has occurred/is occurring
manipulates the exposure(s
what happens to those who had the exposure and those who didn’t!
Person, Place, Time
is it occurring?
is getting the disease?
point in time?
the disease occurrence changed with time?
: A group of people who shares some common attributes
: The degree to which the frequency of the outcome in persons with a specific exposure is higher or lower than the frequency of the outcome among those without the exposure
: What is the probability of the disease occurring?
The population must be defined
Who is at risk of getting the disease?
Exposure & Outcome
: The risk factor(s)
Natural History of Disease
the progression of a disease process in an individual over time, in the absence of treatment
Measures of PPT
: It’s used to described the component of a population that is diseases
: Includes the frequency (count) of disease over a specific period of time
: This compares the count on the top to the count on the bottom of a fraction
: The total number of cases of a disease