There are 10,000 people in City A. Forty percent of the people in City A are "young," and 60% of the people are "old." A total of 428 new cases of influenza developed in City A during 2004. Eight cases occurred among "young" people, and 420 occurred among "old" people.
-The AGE-specific cumulative incidence of influenza among "old" individuals in City A is:

Question

Quizplus · Accepted Answer

The age-specific cumulative incidence among "old" individuals is calculated by dividing the number of new cases among "old" individuals (420) by the total number of "old" individuals (60% of 10,000 = 6,000), then multiplying by 100 to get a percentage: (420/6000) * 100 = 7.0%.

There Are 10,000 People in City A