A state epidemiologist wanted to investigate stomach cancer and shellfish consumption.

 A state epidemiologist wanted to investigate stomach cancer and shellfish consumption. She conducted a study with 125 stomach cancer cases and 125 controls, pair—matched on age and gender. After conducting the study, it was found that there were 35 pairs in which both cases and controls ate shellfish more than 3 times per week [exposed], and 15 pairs in which both cases and controls ate shellfish less than once per month (unexposed). There were 28 pairs where the control ate shellfish more than 3 times per week and the case rarely at shellfish, and 47 pairs where the case at shellfish more than 3 times per week and the control at shellfish rarely. a. Construct the appropriate 2×2 table for this study using the information given. is. Calculate the pair—matched odds ratio for stomach cancer from exposure to eating shellfish regularly compared to eating shellfish rarely. c. What does this odds ratio indicate?