Glucose tolerance 1 hour 13mmol/L is higher than the normal range and therefore is more serious. The normal range of glucose tolerance test 1 hour blood glucose is about 6.7~9.4mmol/L, therefore glucose tolerance test 1 hour blood glucose 13mmol/L is out of the normal range and therefore is serious, but is not a diagnostic criterion for diabetes mellitus. Clinically, fasting blood glucose ≥7.0 mmol/L or glucose tolerance test 2-hour blood glucose ≥11.1 mmol/L are the diagnostic criteria for diabetes. The severity of diabetes mellitus can also be evaluated according to the patient’s blood glucose control, pancreatic β-cell function, and comorbidities. When diabetes mellitus occurs, it is necessary to actively consult the doctor and follow the doctor’s instructions for rational treatment.