There is evidence that exposure to vitamin D during pregnancy protects against wheezing in offspring. In a clinical trial, 290 women were randomized to vitamin D and 290 women were randomized to placebo at 24 weeks of pregnancy. Their children were followed until age 3 to see whether they developed a persistent wheeze. By age 3, 47 children in the vitamin D group and 57 children in the control group had developed a persistent wheeze. Calculate and interpret the 3-year risk ratio of wheeze among offspring of women who received vitamin D versus placebo during pregnancy, assuming no loss to follow-up.

Hint: Create a 2X2 table to answer the question