Patients inadequately controlled on MDI insulin metformin ( mean HbA@c @ % -LSB- @ mmol/mol -RSB- ; BMI @ kg/m ( @ ) ; insulin dose @ international units/day ) were randomized and treated with once-daily empagliflozin @ mg ( n = @ ) , empagliflozin @ mg ( n = @ ) , or placebo ( n = @ ) for @ weeks .