A Cohort Study of Coffee Drinking and Anxiety Was Conducted

A cohort study of coffee drinking and anxiety was conducted at a university campus. There was a total of 30,000 freshmen who participated. Ten thousand (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. Construct a two by two table with the given data, making sure that you have labeled the margins correctly.
-Which of the following is the correct interpretation of the population risk difference?

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"
C) The excess risk of anxiety among the entire freshmen population is "x."
D) None of the above