Accuracy of a portable glucose meter and of a Continuous Glucose Monitoring device used at home by patients with type 1 diabetes

► Accuracy of a hand-held glucometer and a continuous monitoring device was evaluated. ► Overall, laboratory values did not differ from glucometer and CGM readings. ► Below the hypoglycemic threshold the error was > 0.8 mM in 78.9% and 94.1% of cases. ► The errors of the CGM device were inversely related to the rate of glucose change. ► Future portable meters performance should be focused on the extreme glucose levels.