Calculate the risk ratio (RR) from the incidence calculations above using the moderate exposure group as the reference (comparison) group. Show your work.

a)RR for none/low vs. moderate0.0239 / 0.0171 = 1.3976

b)RR for high vs. moderate0.0365 / 0.0171 = 2.1345___________________________

3.It has been suggested the moderate alcohol consumption is "protective" against cardiovascular disease (including stroke), and that a "J" shaped relationship exists. This implies that those with moderate alcohol consumption have the lowest risk, those with none/low consumption have intermediate risk, and those with high alcohol consumption have the highest risk. From your calculations in #1 and #2, do the data support the hypothesis of a "J" shaped relationship between alcohol consumption and risk of ischemic stroke?

a)Yes

b)No

c)Cannot be determined from the data provided

4.In one to two sentences, explain your answer to question #3 above.

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