For Questions 6-13: Use the following information related to a cohort study of c
ID: 3274951 • Letter: F
Question
For Questions 6-13: Use the following information related to a cohort study of coffee drinking and anxiety A cohort study of coffee drinking and anxiety was conducted at a university campus. There were a total of 30,000 freshmen who participated. 10,000 were coffee drinkers and 20,000 were not. Of the coffee drinkers, 500 developed anxiety during the 4 year follow-up period. Of the non- coffee drinkers, 200 developed anxiety during the same time period. Assume that no one in the population died or was lost during the follow-up period. 6. Construct a two by two table with the given data, making sure that you have labeled the margins correctly (3 points) 7. What was the cumulative incidence of anxiety among coffee drinkers? (3 points) a. 2.0 % over a four year period. b. 5.0 % over a four year period. c. 1.0 % over a four year period. d. None of the above 8. What was the cumulative incidence of anxiety among non-coffee drinkers? (3 points). a. 2.0 % over a four year period. b, 5.0 % over a four year period. c. 1.0 % over a four year period. d. None of the above 9. Calculate the risk ratio (a.k.a. relative risk) using the given data. The numeric value of the risk ratio is....(3 points) a. b. 0.2 c. 5.0 d. None of the above 10. Which of the following is the correct interpretation of this risk ratio? (3 points) Coffee drinkers are "X” times as likely to develop anxiety as compared to non- coffee drinkers. The excess risk of anxiety among coffee drinkers is "x" as compared to non- coffee drinkers. The excess risk of anxiety among the entire freshmen population is “x" None of the above a. b. C. d.Explanation / Answer
Answer:
A cohort study of coffee drinking and anxiety was conducted at a university campus. There were a total of 30,000 freshmen who participated. 10,000 were coffee drinkers and 20,000 were not. Of the coffee drinkers, 500 developed anxiety during the 4 year follow-up period. Of the non- coffee drinkers, 200 developed anxiety during the same time period. Assume that no one in the population died or was lost during the follow-up period.
coffee drinkers
non- coffee drinkers
Total
Anxiety
500
200
700
No anxiety
9500
19800
29300
Total
10000
20000
30000
What was the cumulative incidence of anxiety among coffee drinkers?
a. 2.0% over a four year period.
Answer: b. 5.0% over a four year period.
c. 1.0% over a four year period.
d. none of the above.
(500/1000)*100
What was the cumulative incidence of anxiety among non-coffee drinkers?
a. 2.0% over a four year period.
b. 5.0% over a four year period.
Answer: c. 1.0% over a four year period.
d. none of the above.
(200/20000)*100
Calculate the risk ratio (a.k.a. relative risk) using the given data. The numeric value of the risk ratio is….
a. 1.0
b. 0.2
Answer: c. 5.0
d. none of the above
(500/1000)/ (200/20000)
Which of the following is the correct interpretation of the risk ratio?
Answer: a. coffee drinkers are “x” times as likely to develop anxiety as compared to non-coffee drinkers.
b. the excess risk of anxiety among the coffee drinkers is “x” as compared to non-coffee drinkers.
c. the excess risk of anxiety among the entire freshmen population is “x”
d. none of the above
coffee drinkers
non- coffee drinkers
Total
Anxiety
500
200
700
No anxiety
9500
19800
29300
Total
10000
20000
30000
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