Question 2 (40 points) The abstract below presents results of a mortality study among U.S. veterans of the 1990-1991 Persian Golf War.
a) Table 3 below presents sex-specific comparisons of Gulf War veterans with other veterans.
Consider the results for motor vehicle accidents. Is there any evidence of interaction between the main study exposure (participation to the Gulf war) and sex?
In your answer, provide an additive measure of interaction.
Question 3 (35 points) The abstract and the table below present results of a study of oral contraceptives and myocardial infarction (NEJM 2001).
