Imagine that your last hemoglobin A1c result was 5.9. Now it's time for a new test, and the results show that your A1c is 6.1. Does this mean your control has gotten a lot worse?
We have to remember that all these lab tests we get are subject to all kinds of errors. First, they're performed by human beings, and all human beings occasionally make mistakes.
When I was first diagnosed, my hemoglobin A1 (the old test that didn't break down into A1c) was 16. This was equivalent...