RESULTS	Twelve months after the last cycle of chemotherapy ( last follow-up , August 18 , 2009 ) , the rate of early menopause was 25.9 % in the chemotherapy-alone group and 8.9 % in the chemotherapy plus triptorelin group , an absolute difference of -17 % ( 95 % confidence interval , -26 % to -7.9 % ; P < .001 ) .\