Ask The Doctor > Questions & Answers > Level of fasting blood sugar to diagnose pre-diabetes and diabetes

Level of fasting blood sugar to diagnose pre-diabetes and diabetes

Patient: Dear Doctor, Is a Hgb A1c of 5.9 on 1 occasion, fasting blood glucose of 111 and 99 on 2 separate occasions enough for a diagnosis of diabetes?

 

 

Doctor: Diagnostic criteria for diabetes are the ff:Symptoms of diabetes (overeating, frequent urination and frequent drinki ng, weight loss, etc) + random blood sugar =/> 200mg/dLFasting blood glucose =/> 126 mg/dL2-hour plasma glucose =/> 200mg/dL during an oral glucose tolerance testHgbA1c is not part of the diagnostic criteria but it is being used to monitor diabetes control. A fasting blood glucose value between 100mg/dL to 126 mg/dL would mean an impaired glucose tolerance, which is considered a pre-diabetic state. If it exceeds 126mg/dL, diabetes is diagnosed. Sometimes, through years of clinical experience, doctors don’t strictly follow these criteria in labelling patients as diabetics or pre-diabetics. Pre-diabetics, especially if there is a strong family history will eventually have diabetes, most of the time sooner than later. There could be some other factors or previous labs you’ve had (urine test which showed high glucose, etc) that made your doctor think you have diabetes or most likely to have diabetes. Regardless, you need to drastically change your lifestyle and diet. A moderate regular exercise regimen can never be overemphasized in the management of diabetes. A healthy diabetic diet should also be followed. It’s a shame these measures are often ignored by diabetic patients. There are some diabetics controlled on exercise and diet alone and it will always be the first-line treatment since these don’t have unavoidable, undesirable side effects. I do hope I have answered your question and take care always..

 


 

 
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Dr. Jimmy Obaji M.D.

Dr. Jimmy Obaji M.D.

Dr. Jimmy Obaji completed his residency in Family Medicine at the University of Manitoba. He currently operates a walk-in-clinic in downtown Toronto.

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