A 48-year-old man comes to the clinic for a routine physical examination. The patient is asymptomatic but overweight. Although he has no pertinent personal medical history, he has a strong family history of diabetes mellitus. He currently takes no medications. Results of physical examination are normal, except for a BMI of 29. Results of routine laboratory studies show a fasting plasma glucose level of 120 mg/dl and HbA1c 5.1%. Which of the following terms best describes his current glycemic status?