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2. In a study concerned with the possible effects of all poll bronchitis, the following data were obtained. A population of 15,000 men between 40 and 50 years old was examined in January 2010. Of these, 10,000 lived in areas that exposed them to air pollution and 5,000 did not. At this examination, 250 cases of chronic bronchitis were discovered in the total study population. Of these 250 cases, 195 were among those exposed to air pollution. All the men initially examined who did not have chronic bronchitis were available for repeated examinations after five years. These examinations revealed 725 new cases of chronic bronchitis in the total group, which included 175 among those not exposed to air pollution. a. Calculate the prevalence rates of chronic bronchitis at the January 2010 examination for the total sample, the group exposed to air pollution, and the group not exposed to air pollution. Note: Calculate a point prevalence. Your answer should be a rate (i.e. per 1,000) ii. iii. i. ii. opment of chronic Prevalence for the total sample iii. Prevalence of exposed group b. Calculate the following incidence rates after the follow up exam five years later. Incidence of chronic bronchitis for the total sample Prevalence of unexposed group Incidence of chronic bronchitis of those exposed to air pollution Incidence of chronic bronchitis for the group not exposed to air pollution c. Calculate the prevalence rate of bronchitis for the total sample at the end of the study (after the 5 year follow up).

2. In a study concerned with the possible effects of all poll bronchitis, the following data were obtained. A population of 15,000 men between 40 and 50 years old was examined in January 2010. Of these, 10,000 lived in areas that exposed them to air pollution and 5,000 did not. At this examination, 250 cases of chronic bronchitis were discovered in the total study population. Of these 250 cases, 195 were among those exposed to air pollution. All the men initially examined who did not have chronic bronchitis were available for repeated examinations after five years. These examinations revealed 725 new cases of chronic bronchitis in the total group, which included 175 among those not exposed to air pollution. a. Calculate the prevalence rates of chronic bronchitis at the January 2010 examination for the total sample, the group exposed to air pollution, and the group not exposed to air pollution. Note: Calculate a point prevalence. Your answer should be a rate (i.e. per 1,000) ii. iii. i. ii. opment of chronic Prevalence for the total sample iii. Prevalence of exposed group b. Calculate the following incidence rates after the follow up exam five years later. Incidence of chronic bronchitis for the total sample Prevalence of unexposed group Incidence of chronic bronchitis of those exposed to air pollution Incidence of chronic bronchitis for the group not exposed to air pollution c. Calculate the prevalence rate of bronchitis for the total sample at the end of the study (after the 5 year follow up).

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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Week 4 2. 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 15,000 men between 40 and 50 years old was examined in January 2010. Of these, 10,000 lived in areas that exposed them to air pollution and 5,000 did not. At this examination, 250 cases of chronic bronchitis were discovered in the total study population. Of these 250 cases, 195 were among those exposed to air pollution. All the men initially examined who did not have chronic bronchitis were available for repeated examinations after five years. These examinations revealed 725 new cases of chronic bronchitis in the total group, which included 175 among those not exposed to air pollution. a. Calculate the prevalence rates of chronic bronchitis at the January 2010 examination for the total sample, the group exposed to air pollution, and the group not exposed to air pollution. Note: Calculate a point prevalence. Your answer should be a rate (i.e. per 1,000) i. Prevalence for the total sample ii. iii. ii. Prevalence of exposed group b. Calculate the following incidence rates after the follow up exam five years later. i. Incidence of chronic bronchitis for the total sample III. Prevalence of unexposed group Incidence of chronic bronchitis of those exposed to air pollution Incidence of chronic bronchitis for the group not exposed to air pollution c. Calculate the prevalence rate of bronchitis for the total sample at the end of the study (after the 5 year follow up).
Transcribed Image Text:Week 4 2. 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 15,000 men between 40 and 50 years old was examined in January 2010. Of these, 10,000 lived in areas that exposed them to air pollution and 5,000 did not. At this examination, 250 cases of chronic bronchitis were discovered in the total study population. Of these 250 cases, 195 were among those exposed to air pollution. All the men initially examined who did not have chronic bronchitis were available for repeated examinations after five years. These examinations revealed 725 new cases of chronic bronchitis in the total group, which included 175 among those not exposed to air pollution. a. Calculate the prevalence rates of chronic bronchitis at the January 2010 examination for the total sample, the group exposed to air pollution, and the group not exposed to air pollution. Note: Calculate a point prevalence. Your answer should be a rate (i.e. per 1,000) i. Prevalence for the total sample ii. iii. ii. Prevalence of exposed group b. Calculate the following incidence rates after the follow up exam five years later. i. Incidence of chronic bronchitis for the total sample III. Prevalence of unexposed group Incidence of chronic bronchitis of those exposed to air pollution Incidence of chronic bronchitis for the group not exposed to air pollution c. Calculate the prevalence rate of bronchitis for the total sample at the end of the study (after the 5 year follow up).
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