Measuring blood glucose (glycemia) 1 hour PC (after a meal) is a test that is rarely prescribed but may be useful, for example, when monitoring gestational diabetes. This test is different from the 1-hour post 50 grams blood glucose test dosage used to screen patients at risk of developing gestational diabetes. The blood glucose 1 hour PC better reflects fluctuations in glucose levels in the patient’s environment (eating habits, medication-related, etc.) and complements diabetes self-monitoring performed at home with a blood glucose monitor or monitoring in a lab with a measure of the fructosamine level (pregnant patient) or glycosylated hemoglobin (HbA1c) among men or among women who are not pregnant.
Glycemia, exactly 1 hour after the end of a balanced meal containing sufficient carbohydrates (sugars) but also other elements from each of the major food groups, must be lower than 7.8 millimoles of glucose per litre of blood (mmol/L) and, in pregnant women, ideally over 5.0 mmol/L.