Now that we have the technology to enable very tight control, we've seen a lot of debate about whether it is possible to have a "too low" A1C. Obviously, if the only reason your A1C is decent is because you go low all the time, this is bad. I wanted to try and come up with a formula to answer the question "is my A1C too low?" Basically I tried to find a way to combine A1C with % of time below range into a meaningful "score". I did this making the assumption that a high A1C with a high-ish amount of lows is better than a low A1C with a high-ish amount of lows. Here is the formula came up with:
1/log(A1C)% of time below range
Examples: A1C 5.0, low 5% of the time: 1/log(5).05 = 1.18 A1C 5.0, low 1% of the time : 1/log(5).01 = 1.003 A1C 7.0, low 5% of the time: 1/log(7).05 = 1.008 A1C 7.0, low 1% of the time: 1/log(7).01 = 1.001
From these and other examples I've made, it seems like anything over ~1.15 is "bad", i.e. indicative of "buying" a low A1C with too many hypos.
Anyone find this useful/have any improvements?
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