What is the incidence rate of chronic bronchitis

Reference no: EM133617875

Problem: In a study concerned with the possible effects of air pollution on the development of chronic bronchitis, the following data were obtained: A population of 9,000 men aged 45 years was examined in January 2010. At this examination, 90 cases of chronic bronchitis were discovered. All the men initially examined who did not have chronic bronchitis were available for subsequent repeated examinations during the next 5 years. These examinations revealed 268 new cases of chronic bronchitis in the total group. What is the incidence rate (per 1,000) of chronic bronchitis for the subsequent 5 years?

Reference no: EM133617875

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