For weeks 14 calculate the prevalence and incidence rates an

For weeks 1-4, calculate the prevalence and incidence rates, and express them as a decimal.

Solution

Prevelence rate = Total number of diagnosed till date / Total population

Incidence rate = Number of newly diagnosed till time t / Current undiagnosed population till time t

Total number of diagnosed till 4th week = sum of all diagnosed = 1000

Total population at time t = 0 week = 1025

Number of newly diagnosed for each week = Data alredy given in the question

Based on the above formulae and data the following are the outputs:

Week	Newly diagnosed SF	NO SF diagnosed	Incidence rate
0	0	1025	0.00
1	105	920	0.10
2	180	740	0.20
3	390	350	0.53
4	325	25	0.93
Total number of SF diagnosed till the 4th week (sum) =	1000
Population at the time t = 0	1025
Prevalence rate =	0.98