Assessment of long-term glycemia in type I diabetes using multiple blood glucose values stored in a memory-containing reflectometer

The relationship between repetitive hemoglobin A 1 values and daily blood glucose tests performed by 20 insulin-dependent diabetic outpatients was assessed over a six-week period using a modified reflectance meter capable of storing blood glucose determinations automatically. An average of four and a half determinations per subject per day was recorded with a range of average blood glucose values between 82 ± 2 mg/dl and 316 ± 5 mg/dl (mean ± SE). The relationship between average blood glucose and hemoglobin A 1 values was significant when hemoglobin A 1 values at the end of the six-week period were correlated with the mean blood glucose level over that period (r = 0.55, p