GlucoTrack performance was evaluated using clinical and numerical accuracy methods [28]. Clinical accuracy was assessed using Clarke error grid (CEG) analysis that evaluates medical importance of the differentiations between GlucoTrack and the established invasive blood glucose reference method [29]. In this analysis, a grid breaks down a scatterplot of a reference glucose monitoring device and an evaluated glucose monitoring device into five regions: region A includes values within 20% of the reference, region B contains points that are outside of 20% but would not lead to inappropriate treatment, region C consists of points leading to unnecessary treatment, region D includes points indicating a potentially dangerous failure to detect hypoglycemia or hyperglycemia, and region E contains points that would confuse treatment of hypoglycemia for hyperglycemia and vice versa. Region A is considered clinically accurate and region B is considered clinically acceptable. Numerical accuracy was assessed using absolute relative difference (ARD) of paired GlucoTrack-HemoCue measurement readings, calculated as follows: ARD=