Question

Use this information to answer questions 14-17.  You are interested in looking at the effects of folic acid supplementation during pregnancy. Your research team provides you with the following table

***This in NOT a 2 x 2 table.

	Annual Death Rates per 100,000
	Outcome #1 Neural Tube Defects	Outcome #2 Premature Births
No Folic acid supplementation (Exposed)	633	725
Folic acid supplementation (Unexposed)	25	579

14. Calculate the risk difference for no folic acid supplementation on Neural Tube Defects.

15. Calculate the risk difference for no folic acid supplementation on premature births.

16. Interpret in words the meaning of the two risk differences above.

17. What is the proportion of neural tube defects among those that received no folic acid supplementation that would be eliminated if supplementation were given?

18. What is the proportion of premature births among those that received no folic acid supplementation that would be eliminated if supplementation were given?

Answer 1