A total of 17 patients ( seven were women ) with T1D ( age of 42 ( 24-63 ) years ( mean and range ) , BMI of 24.7 ( 19.5-28 .3 ) kg/m ( 2 ) , HbA1c of 7.2 ( 6.3-8 .0 ) % ( 55 ( 45-64 ) mmol/mol ) , T1D duration of 26 ( 8-45 ) years ) were studied using a randomized , three-period crossover design .