Modal day by baseline A1C subgroup. Illustrates improvement in glycemic control (blinded versus display). Fasting (midnight to 7:00 a.m.) glucose levels were normal only for subjects with A1C ≤6.0%. Subjects with A1C >10.0% dramatically reduced hyperglycemic exposure. A: Data collected while subjects were blinded to continuous glucose data (insertion period 1). B: Data collected while subjects were given real-time access to continuous glucose values, trend graphs, and high/low alerts (insertion periods 2 and 3).