| convert_cir_to_age {LTFHPlus} | R Documentation |
Convert cumulative incidence rate to age
Description
convert_cir_to_age computes the age
from a person's cumulative incidence rate.
Usage
convert_cir_to_age(cir, pop_prev = 0.1, mid_point = 60, slope = 1/8)
Arguments
cir |
A positive number representing the individual's cumulative incidence rate. |
pop_prev |
A positive number representing the overall population prevalence. Must be at most 1 and must be larger than cir. Defaults to 0.1. |
mid_point |
A positive number representing the mid point logistic function. Defaults to 60. |
slope |
A number holding the rate of increase. Defaults to 1/8. |
Details
Given a person's cumulative incidence rate (cir), convert_cir_to_age
can be used to compute the corresponding age, which is given by
mid\_ point - \log(pop\_ prev/cir - 1) * 1/slope
Value
If cir and mid_point are positive numbers, if pop_prev
is a positive number between 0 and 1 and if slope is a valid number,
then convert_cir_to_age returns a number, which is equal to
the current age.
Examples
curve(sapply(cir, convert_cir_to_age), from = 0.001, to = 0.099, xname = "cir")