Question

A population of 9,000 men was examined in January 2014. Of these men, 6,000 were exposed to high levels of air pollution, and 3,000 were exposed to low levels of air pollution. At the physical examination, 90 cases of chronic bronchitis were identified, including 60 cases among the high-exposure group. All of the men who were initially examined and did not have chronic bronchitis were followed by repeat examination over the next five years. These follow-up exams identified 268 new cases of bronchitis in the total group, including 30 cases among the low-exposure group. Calculate the prevalence and the incidence.

Calculate the incidence of chronic bronchitis in the low-exposure group:

Answer 1

The incidence of chronic bronchitis in the low-exposure group is 1%.

Step-by-step explanation:

The incidence of chronic bronchitis in the low-exposure group can be calculated by dividing the number of new cases of bronchitis in the low-exposure group (30) by the total number of men in the low-exposure group (3,000). This gives us an incidence rate of 0.01, or 1%.