Risk sensitivity and specificity can be used to evaluate how good a risk factor is for predicting mortality in the population.
Risk sensitivity is the proportion of people who die during the follow-up period who were identified as high risk.
Risk specificity is the proportion of people who survive during the follow-up period who were identified as low risk.
Patient subgroups:
(1) high risk fraction = those with risk factor
(2) low risk fraction = those without risk factor
risk sensitivity in percent =
= (mortality for high risk subgroup in percent) * (percent of population identified as high risk) / (cumulative mortality in percent for the whole population)
risk specificity in percent =
= (survival for low risk subgroup in percent) * (percent of population identified as low risk) / (cumulative survival in percent for the whole population)
percent of population in high risk group =
= 100 - (percent of population in low risk group)
cumulative survival of high risk group =
= 100 - (cumulative mortality of high risk group)
cumulative survival of low risk group =
= 100 - (cumulative mortality of low risk group)
cumulative survival of population =
= 100 - (cumulative mortality of population)
