Interpret the following sta!s!cs from epidemiological studies.

a. Risk ra!o of disease A (condi!onal risk of disease among exposed/condi!onal risk of disease among unexposed) = 1.9 The 95% confidence interval for the risk ra!o = (0.6, 3.2)

b. Risk ra!o of disease B (condi!onal risk of disease among exposed/condi!onal risk of disease among unexposed) = 0.7 The 95% confidence interval for the risk ra!o = (0.5, 0.9)

c. Risk difference of disease C (risk of disease among exposed - risk of disease among unexposed) = 1.9 per 100 subjects The 95% confidence interval for the risk difference = (0.6, 3.2)

c. Risk difference of disease D (risk of disease among exposed - risk of disease among unexposed) = -0.7 per 100 subjects The 95% confidence interval for the risk difference = (-1.9, 0.5)