At 3 years , least-squares mean HbA1c change was -1.01 % ( SE 0.07 ) in the exenatide group versus -0.81 % ( 0.07 ) in the glargine group ( least-squares mean difference -0.20 % , SE 0.10 , 95 % CI -0.39 to -0.02 ; p = 0.03 ) .