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 evide ...

, preventable fraction for the population (PFp), is the proportion of incidents in the population that could be prevented by exposing the whole population. It is calculated as

PF_p = (I_p - I_e)/I_p

, where

I_e

is the incidence in the exposed group,

I_p

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 ...

References

Epidemiology Medical statistics {{health-stub

See also

References