Time in range versus A1c…which measurement matters more when it comes to T1D care and management?
Well, I’m not exactly in a position to answer that, because I think the answer is unique to all people with diabetes. But I can explain what exactly both of these numbers are and how I view them.
A1c: Also known as Hb1c or hemoglobin A1c, this is a test that is conducted every 3 months (or as requested) by an endocrinologist. A patient gets blood drawn to determine the average amount of glucose concentration in the blood during that 3 month period. The result of this test is a percentage amount, with 5% being an average result for a non-diabetic individual. I consider the A1c result to be highly personal, so I don’t often share mine with others; however, I do refer to it when describing ways in which I want to improve my diabetes care and management.
Time in range: This value describes the literal amount of time that a person’s blood sugar is in “range” for a given period of time (e.g., one day, one week, one month, etc.). “Range” refers to above a person’s low threshold and below a person’s high threshold. One person’s defined range may vary greatly from another person’s, but for me, I have my low set at 80 and my high set at 180 on my Dexcom. In a perfect world, my range would be more like 80-120, but I have a higher threshold set to minimize the number of alarms that go off.
So really, both are just two different ways of measuring blood sugar performance over the course of certain time frames. And while I try to bear in mind that these are both simply numbers that help me see part of the diabetes picture, and not sole indicators of how “well controlled” I am or am not, I do pay special attention to them and have certain goals for myself. (I strive for an A1c of under 7 and I like my time in range to be at least 75%: These are goals I came up with independently, without my endocrinologist’s feedback, because it’s what I feel comfortable with when it comes to my diabetes…other T1Ds feel differently, and that’s totally okay!)
It’s important to me that I remember that my “success” as a person with T1D is not defined by either of these numbers. In fact, I know many other T1D individuals feel the same way that they should be viewed as signposts along the road to achieving desired diabetes results. It can be hard to do, though, because of how much weight is placed on these numbers by medical professionals and from people across the Internet.
The bottom line? I try to tune out the background noise and focus on taking it one day at a time. By no means am I perfect, but nobody is, and I know better than to put pressure on myself to strive for perfection. Instead, I do the best that I can to maintain my A1c and time in range goals, while doing everything I can to keep the bigger picture in mind instead of individual numbers.