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What Is A Good Score For A1c?

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How To Calculate Your A1c

The Hemoglobin A1c (HbA1c or simply A1c for short) test is a blood test used to measure the average blood glucose concentration in your body in the past 1-3 months. For diabetics, this is the standard way of determining how well the diabetes is controlled. An A1c of less than 7% is considered good. Getting the test every 3 months (usually during a doctor visit) is usually enough. But sometimes you may want to just estimate your A1c level based on the data from your regular self-tests. The formula below could help in this case. Accuracy, of course, could vary depending on how often and when you check your blood sugar. I found it pretty accurate last time I used it. My calculation was off only by 0.1%. This is the same formula GlucoseTracker uses in the app's dashboard. Glucose in mg/dL: A1c = (46.7 + average_blood_glucose) / 28.7 Glucose in mmol/L: A1c = (2.59 + average_blood_glucose) / 1.59 So, for example, if your average blood glucose level in the past 3 months is 130 mg/dL (7.2 mmol/L) , your estimated A1c is 6.15%. There are also cheaper devices you can buy that will allow you to do the actual A1c tests yourself, like this one. If you need to do these tests more often, say ever Continue reading >>

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  1. classicdame

    The A1c is a 90 day average of blood sugars. 4.9 translates to an AVERAGE blood sugar less than 90 mg/dl. This means the patient could be having hypoglycemia events, which can be fatal.
    Suggestions: patient may be checking blood sugar infrequently and/or at a time when real-time BS is normal. Patient may be on medication that drops the blood sugar to a below-normal range (this can be adjusted by MD). Patient may not be eating enough or may be overdoing exercise.
    Thankfully there are now many meds for DM and the physician or NP should be able to determine the best therapy for this patient. The WRONG thing to do is self-medicate and hope for the best.

  2. *ac*

    I did my senior practicum in diabetes and have studied and lived with it extensively.
    A1c is not really an average, because most of the blood cells are not 90 days old. On a curve, most of them would fall into the 2 or 3 week old range. That it's commonly called an average is a pet peeve of mine.
    It can also be scewed by having many hypos coupled with many hyperglycemic excursions - this can result in a fairly low A1c, but have been a very dangerous way to get there. Also, recent studies show that wide swings are more dangerous than high A1c.

  3. classicdame

    Agreed. But when I am consulting with patients or nurses who just want "the bottom line" I do not try to give more info then they need. That is why I called it an average. It implies there are highs and lows. The important thing for Grammyj to know is that the healthcare provider needs to be consulted and asked "what does this mean to ME?"

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