Kind of a thought on this whole thing.
I don’t know how anyone does A1C estimates. But in general, if an estimate is only averaging BG’s they are missing something.
A very important factor is the length of a high BG.
So if I were coming up with an estimation algorithm, I would look at things like this:
If you have a 250 and a 80, that averages out to 165.
But being 250 and then the meter showing a BG of 80 an hour later, is much different than being 250 and the meter showing a BG of 80 4 hours later. (One of them is a short span of 250, while the other implies a much longer high and more time out-of-range.)
I assume Dexcom does this sort of thing with their A1C estimates, looking at times. But do any other meter thingies (phone apps, meters, glooko’s, etc.) do estimates in a smarter way than simply averaging BG’s?
@Chris, do you happen to know?
This accu-check site does an A1C estimate, but it’s a simple average BG calculation, so it’s kinda worthless: