Question

One thousand people are enrolled in a 10-year cohort study. At the start of the study, 100 have diagnosed CVD. Over the course of the study, 80 people who were free of CVD at baseline develop CVD.1. What is the cumulative incidence of CVD over 10 years?Cumulative Incidence 10 Years =_______2. What is prevalence of CVD at baseline?Prevalence Baseline =________3. What is the prevalence of CVD at 10 years?Prevalence 10 Years =_______

Answer 1

Explanation:

find the solution below

Answer 2

1. we see 80% of healthy people develops CVD

let healthy people be x, time t(in yrs) and infected people = y, z= no of healthy people left that year

t x y z

1 100 80 20

2 120 96 24

3 124 100 24

4 124 100 24

5 124 100 24

6 124 100 24

7 124 100 24

8 124 100 24

9 124 100 24

10 124 100 24

at last only 24 were left not having disease

Cumulative incidence of CVD = 1000-24 = 976

2. Prevalence of CVD at baseline = 80/100 = 0.8 = 80%

3. Prevalence of CVD at 10 years = 976/1000 = 0.976 = 97.6%