At week 24 , adjusted mean ( SE ) changes from baseline in HbA1c were -0.13 % ( 0.05 ) % ( -1.4 [ 0.5 ] mmol/mol ) with placebo , -0.70 % ( 0.05 ) % ( -7.7 [ 0.5 ] mmol/mol ) with empagliflozin 10 mg , and -0.77 % ( 0.05 ) % ( -8.4 [ 0.5 ] mmol/mol ) with empagliflozin 25 mg ( both P < 0.001 ) .