A: Relationship between blinded mean glucose values (midnight to 7:00 a.m.) and baseline A1C. The green shaded area corresponds to the current American Diabetes Association recommended target range for fasting glucose (90–130 mg/dl). Groups were compared with the A1C ≤6% group: *P < 0.05; **P < 0.001. Error bars indicate SEM. B: Relationship between change in mean glucose value in milligrams per deciliter (display − blinded) and baseline A1C. Negative values correspond to a reduction in mean glucose during unblinded device use relative to blinded device use: *P < 0.05, **P < 0.001 for the difference between blinded and display use. Error bars indicate SEM.