Please help me with this!!

1) You wish to conduct a case-control study of alcohol consumption and the incidence of gastric ulcers. You interview new cases of gastric ulcer about their drinking habits 5 years before their diagnosis, and compare them with normal controls identified with random digit dialing. As part of your investigation, you need to asses whether gender is a potential confounder or effect modifier. The results are shown below for men and women. (SHOW YOUR WORK) Men Cases Controls > 2 drinks/day 79 108 2 drinks/day 22 24