Decision Analysis Grid : [+]=increase, [0]=no change and [-]=decrease insulin dose vs. the insulin dose considered by the patient to be optimal to reach the target. Cells A1, A2, A3 indicate full agreement ([++], [00], [–]); cells C1, C2 indicate full disagreement ([+-], [-+]); cells B1, B2, B3, B4 are referred as neutral ([+0], [0+], [0-], [-0]).