sentences:  The main measure of effectiveness was the level of glycosylated haemoglobin (HbA1c), which gives an indication of how well blood glucose is controlled.In two studies involving 840 participants with type 2 diabetes, dapagliflozin when used alone decreased HbA1c levels by 0.66 percentage points more than placebo (a dummy treatment) after 24 weeks.In four other studies involving 2,370 participants, adding dapagliflozin to other diabetes medicines decreased HbA1c levels by 0.54-0.68 percentage points more than adding placebo after 24 weeks.