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worksheet 5

# worksheet 5 - November Throughout November and December 310...

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Name: __________________________ Worksheet 5 - 2x2 Tables Worksheet 1. In a case-control study about heart defects in babies, 600 newborns were studied (300 cases and 300 controls). A total of 190 babies who had heart defects were born to mothers who used retinoic acid to treat acne while they were pregnant, and 210 babies without heart defects were born to mothers who did not use retinoic acid while pregnant. Complete the 2 x 2 table for this study. Cases (Heart defects) Controls (No heart defects) Retionoic acid 190 No retinoic acid 210 Total 300 300 a. Calculate the odds ratio. b. In one sentence, interpret your results. 2. In a cohort study of 820 people, 585 people received the flu vaccine during the first week of

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Unformatted text preview: November. Throughout November and December, 310 people in the study developed the flu. Of those who stayed healthy, 370 had been vaccinated. a. Construct a 2 x 2 table b. Calculate the appropriate measure of association. c. Is having the exposure (the vaccine) protective, or does it put people at higher risk for having flu? Name: __________________________ 3. Below is a table showing the age-adjusted mortality rates (per 10,000) of stroke and congestive heart disease (CHD) in smokers. Smokers Non-smokers CHD 132 20 Stroke 682 416 a. Calculate the relative risk for congestive heart disease and interpret your findings. b. Calculate the attributable risk for each disease and interpret your findings....
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worksheet 5 - November Throughout November and December 310...

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