Suppose that 2000 pregnant women were identified during their 1st trimester and completed questionnaires about health behaviors, including alcohol consumption. Among the 800 women who drank alcohol during pregnancy, 200 delivered low birth weight (LBW) infants. Among the 1200 who did not drink alcohol during pregnancy, 150 delivered low birth weight babies. Complete the 2x2 table, labeling the exposure and disease boxes with the proper information. Show all your work for the calculations. Disease:
Low birth weight babies
No Disease:
Average birth weight babies
Exposure:
Alcohol consumption
No exposure:
No alcohol
1. What type of study design is this?
2. What is the appropriate measure of association?
3. Calculate the appropriate measure of association.
4. Can you calculate the AR% from the information provided? If so, calculate it and explain what it means.