11. Calculate and interpret the OR for the following 2x2 table showing the results of a case-control study looking at the association between getting at least 8 hours of sleep per night and having a GPA at or above 3.0. (3 points) Outcome: GPA at or above 3.0
Exposure: Getting at least 8 hours of sleep per night Yes No Yes 100 50 No 50 250 Total 150 300 OR = OR interpretation:
12. Researchers located 189 infants born with birth defects. A total of 600 other births were selected at random. Mothers were given a dietary questionnaire. Among mothers who had a baby with a birth defect, 120 reported smoking during pregnancy. Among controls, 115 mothers smoked. Construct a 2x2 table for these results, calculate the OR, and interpret the OR. (6 points) OR = OR interpretation:
13. A cohort study is conducted to study the association between coffee drinking and anxiety. Among 10,000 coffee drinkers, 500 developed anxiety. Among the 20,000 non-coffee drinkers, 200 cases of anxiety were observed. What is the relative risk of anxiety associated with coffee use? Create a 2x2 table, calculate the RR, and interpret the RR. (6 points) RR = RR interpretation:
14. A cohort study is conducted to study the association between dietary fiber intake and heart disease. Among 400 people who consumed recommended levels of fiber, 20 developed heart disease. Among 600 people who did not consume recommended levels of fiber, 150 developed heart disease. Create a 2x2 table, calculate the RR, and interpret the RR. (6 points) RR = RR interpretation:
11. Calculate and interpret the OR for the following 2x2 table showing the results of a case-control study looking at the association between getting at least 8 hours of sleep per night and having a GPA at or above 3.0. (3 points) Outcome: GPA at or above 3.0
Exposure: Getting at least 8 hours of sleep per night Yes No Yes 100 50 No 50 250 Total 150 300 OR = OR interpretation:
12. Researchers located 189 infants born with birth defects. A total of 600 other births were selected at random. Mothers were given a dietary questionnaire. Among mothers who had a baby with a birth defect, 120 reported smoking during pregnancy. Among controls, 115 mothers smoked. Construct a 2x2 table for these results, calculate the OR, and interpret the OR. (6 points) OR = OR interpretation:
13. A cohort study is conducted to study the association between coffee drinking and anxiety. Among 10,000 coffee drinkers, 500 developed anxiety. Among the 20,000 non-coffee drinkers, 200 cases of anxiety were observed. What is the relative risk of anxiety associated with coffee use? Create a 2x2 table, calculate the RR, and interpret the RR. (6 points) RR = RR interpretation:
14. A cohort study is conducted to study the association between dietary fiber intake and heart disease. Among 400 people who consumed recommended levels of fiber, 20 developed heart disease. Among 600 people who did not consume recommended levels of fiber, 150 developed heart disease. Create a 2x2 table, calculate the RR, and interpret the RR. (6 points) RR = RR interpretation:
