Described herein is a method for determining the disease state in a patient using combined mean glucose measurements and 1,5-anhydroglucitol to identify individuals at risk for developing diabetes. The ratio of mean glucose measurements to 1,5-anhydroglucitol correlates significantly better to maximal levels of postmeal glucose levels and related measurements, than mean glucose measurements or 1,5-anhydroglucitol correlate independently.
