9. Cumulative incidence rate = incidence of new cases during follow up / number of disease free cases at start of follow up
Total number of population - 9000
At the starting 90 cases of chronic bronchitis were found out of 9000
Means disease free = 9000-90
= 8910
In the follow up after 5 years , 268 new cases were found
Cumulative incidence = 268/ 8910 × 1000
= 3.007
11. Case fatality rate = number of deaths due to a specific disease /total number of persons with the specific disease × 100
Total number of persons with Tuberculosis - 300
Number of deaths due to tuberculosis - 60
Case fatality = 60/300 ×100
= 20%
Option A ) 20% is correct
U lilly WII Peceive a score of 0. Question 9 4 pts You conducted a study...
Among a total of 1000 college freshmen, a total of 450 have consumed energy drinks and 375 have used alcohol. Of those who . consumed energy drinks, 305 have used alcohol 1. Using energy drink consumption as the exposure and alcohol use as the "disease," create a contingency table with the data (1 points) 2. In order to determine internal validity of the study, what information (at least two things) would you want/need to know? Why is each important for...