Vitamins Reduce Cancer Risk--Relatively Speaking

A new study shows that women who take multivitamins and folic acid during pregnancy reduce the chance that their baby will develop some childhood cancers by almost 50%. Your first question on reading this should be "50% of what?"In other words, you want to know what the absolute risk of developing pediatric cancer is. Then you can figure out whether a 50% reduction (the so-called relative risk)