If 300 of the subjects with gastrointestinal bleeding and 100 of the subjects without gastrointestinal bleeding reported using NSAIDS during their interview, what would have been the measure of association?
An epidemiologist was interested in determining whether use of non-steroidal anti-inflammatory drugs (NSAIDS) causes gastrointestinal bleeding. S/he recruited 600 subjects who had been hospitalized with gastrointestinal bleeding and 600 subjects from the local community who had never been diagnosed with such a bleeding problem. Due to concern over their diagnosis, subjects who had experienced a gastrointestinal bleed were able to provide a more accurate recollection of their NSAID use, while the comparison subjects were more likely to underestimate their use.
a. 1.5
b. 3
c. 5
d. 7
Ans: c
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