Area compatibility factor

In survival analysis, the area compatibility factor, F, is used in indirect standardisation of population mortality rates.

$F = \frac{\sum_x {}^sE_{x,t}^c {}^sm_{x,t}}{\sum_x {}^sE_{x,t}^c} \left/ \frac{\sum_xE_{x,t}^c {}^sm_{x,t}}{\sum_x E_{x,t}^c}\right.$

where:

${}^sE_{x,t}^c$ is the standardised central exposed to risk from age x to x + t for the standard population,

$E_{x,t}^c$ is the central exposed to risk from age x to x + t for the population under study and

s m x, t

is the mortality rate in the standard population for ages x to x + t.

F is then multiplied by the crude mortality rate to arrive at the indirectly standardised mortality rate.

This statistics-related article is a stub. You can help Wikipedia by expanding it.