The primary outcome-reduction in risk for hypoglycemia as measured by the low blood glucose ( BG ) index ( LGBI ) - resulted in an effect size of 0.64 , P = 0.003 , with a twofold reduction of hypoglycemia requiring carbohydrate treatment : 1.2 vs. 2.4 episodes/session on CLC versus OL ( P = 0.02 ) .