In
epidemiology
Epidemiology is the study and analysis of the distribution (who, when, and where), patterns and determinants of health and disease conditions in a defined population.
It is a cornerstone of public health, and shapes policy decisions and evidenc ...
, preventable fraction for the population (PF
p), is the proportion of incidents in the population that could be prevented by exposing the whole population. It is calculated as
, where
is the incidence in the exposed group,
is the incidence in the population.
It is used when an exposure reduces the risk, as opposed to increasing it, in which case its symmetrical notion is
attributable fraction for the population
In epidemiology, attributable fraction for the population (AFp) is the proportion of incidents in the population that are attributable to the risk factor. The term attributable risk percent for the population is used if the fraction is expressed as ...
.
See also
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Population Impact Measures
Population impact measures (PIMs) are biostatistical measures of risk and benefit used in epidemiological and public health research. They are used to describe the impact of health risks and benefits in a population, to inform health policy.
Fre ...
*
Preventable fraction among the unexposed In epidemiology, preventable fraction among the unexposed (PFu), is the proportion of incidents in the unexposed group that could be prevented by exposure. It is calculated as PF_u = (I_u - I_e)/I_u = 1 - RR, where I_e is the incidence in the expose ...
References
Epidemiology
Medical statistics
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