t-Year Population Impact Number of Eliminating a Risk Factor (PIN-ER-t)


Your population size (n)

Number of years (t) over which you are considering the population impact

The incidence rate of the outcome in the population (Ip)

The population size from which this was calculated

The prevalence of the exposure in the population (Pe)

The population size from which this was calculated

The new prevalence of the exposure (0 if eliminating the risk)

Relative risk (RR) of the outcome if the risk factor is present

Lower 95% confidence limit for RR

Upper 95% confidence limit for RR


Seed for Random Number Generator





Click here for an explnation of the methods used

Written (version 4.0; 8th Aug 07) by Dr. Iain Buchan & Mr. Paul Jarvis
Public Health Informatics at The University of Manchester