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Discusses Women's Health

Most of us plan our medical appointment based on symptoms and complaints, need for check up, schedule and of course, the availability of our physician or health care practitioner. There are only so many early morning openings, and these may be further diminished when doctors make hospital rounds and/or perform surgeries before arriving at the office. If you don’t want to leave home without breakfast in the morning or you have to make a late afternoon appointment, you may not be willing or able to fast for blood tests. (I encourage everyone to eat their breakfast…I won’t leave home without it. This may be the time to mention that individuals who don’t eat breakfast have a shorter life span….fasting from dinner until lunch will result in an overly aggressive i.e., high, insulin response to the delayed meal. Elevated insulin levels can cause fat to accumulate in unwanted places and increase the risk of cardiovascular disease.)

So there you are at the doctor’s office, you have not fasted and you are told that the blood test for diabetes (and perhaps heart disease) can’t be done…Thus is no longer inaccurate. An article just published in the March 4 issue of The New England Journal of Medicine reported that a non fasting blood test called glycated hemoglobin (also known as hemoglobin A1c) will diagnose risk of diabetes just as well or better than a fasting blood sugar (glucose) test and can also strongly indicate risk of cardiovascular disease and death from any cause!

Until recently, the standard measure used for diagnosis of diabetes was a fasting blood sugar. Glycated hemoglobin is a test that reflects your previous 2 to 3 month exposure to glucose and will include spikes that occur after eating. It doesn’t vary from hour to hour or day to day and is not dependent on what you just ate. It is essentially the glucose “truth meter” for what you have consumed and your blood glucose response over the past few months. It has traditionally been used for the determination of glucose control among those who have already been diagnosed with diabetes and are on therapy. But this and other reports will eventually make glycated hemoglobin the test “of choice” for diagnosis and assessment of diabetic risk in everyone.

The Atherosclerosis Risk in Communities (ARIC) is a community -based prospective study of middle-aged adults from four U.S. centers. It was started in the late 80’s and continues to present time. During the study, the researchers measured the glycated hemoglobin in blood samples from 11,092 adults who did not have a history of diabetes or cardiovascular disease. More than 55% of those tested were women. Their ages ranged from the mid-forties to mid-sixties. For the individuals who were found to have glycated hemoglobin of 6.0 to 6.5%, the risk of diabetes (the technical term was multi-variable-adjusted hazard ratio) was 4.48. (Those who had values of 6% to 6.5% were 4.48 times more likely to develop diabetes then individuals used as a reference who had glycated hemoglobin of less than 5.5%). For those individuals who had a level greater than 6.5% the risk was 16.47. The researchers then checked to see who developed coronary disease and stroke. The hazard ratio for a value of 6 to 6.5% was 1.76 and over 6.5% was 1.95 (or a 95% increase over those with low glycated hemoglobin levels.) They also looked at death from any cause and found that the higher the glycated hemoglobin, the greater the risk of mortality. Moreover glycated hemoglobin levels were found to be more predictive of disease than fasting blood sugar levels.

Studies have show that among people in the United States who do not have a diagnosis of diabetes, over 2.4 million have a glycated hemoglobin higher than 6.5% and 7 million have a value higher than 6.0%. This is an ill inspiring number.

Bottom line: A non-fasting blood test for glycated hemoglobin can help determine whether you are at risk for development of diabetes, cardiovascular disease and even early death. Hopefully it will be less than 6.0%. Most of us now know our cholesterol and lipid levels; it may be just as important to know your glycated hemoglobin level. If it’s too high you and your doctor will need to discuss the necessary behavioral changes and therapies that will help you to maintain your health.

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