03-10-2016, 03:07 PM
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Best ROC interprepation ever!!! - 16md
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03-10-2016, 03:19 PM
03-12-2016, 04:53 AM
can u help with population atributable risk? i cant understand the formula for the life of me!
03-12-2016, 01:46 PM
The "attributable risk" represents the difference in the rate of a disease in an exposed, compared with a non-exposed, population. It reflects the additional incidence of disease related to an exposure taking into account the background rate of the disease. The attributable risk is calculated by subtracting the incidence of a disease in nonexposed persons from the incidence of disease in exposed persons.
A related term, the "population attributable risk" is used to describe the contribution that an exposure has on the incidence of a specific disease in a population. It is calculated by multiplying the attributable risk by the prevalence of exposure to a risk factor in a population. The population attributable risk is particularly important when considering public health measures and the allocation of resources intended to reduce the incidence of a disease.
03-12-2016, 01:51 PM
The Population Attributable Risk (or Population Attributable Fraction) indicates the number (or proportion) of cases that would not occur in a population if the factor were eliminated (e.g. how many lives would be saved if people no longer smoked?)
(But be careful, for there are several synonyms and related concepts that can easily be confused with each other: "Population attributable risk"; "population attributable risk proportion"; "etiologic fraction"; "excess fraction") The attributable risk in a population depends on the prevalence of the risk factor and the strength of its association (relative risk) with the disease.
03-12-2016, 03:17 PM
read as well from the same website chaper 8 page 4 understanding the results, will make more sense
http://ebp.uga.edu/courses/
03-14-2016, 03:54 PM
disease + disease-
exposed + a b exposed - c d AR=(a/a+b)-(c/c+d) |
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