I recently read an article on Diatribe about the results of a blood glucose monitor accuracy study. My main meter, Dario, wasn’t included in the study, but my secondary meter, a OneTouch Ultra, was. The OneTouch scored 90% accuracy compared to laboratory values. After reading the article I thought I might buy a better meter, so when I was at CVS yesterday I got a CVS Advanced meter, which scored 97% accuracy in the study.
This morning I tested my blood glucose on all three meters using the same finger stick (same drop of blood, just keep squeezing), and here is what they said:
Dario - 101
OneTouch - 110
CVS Advanced - 128
That’s a big range of values. So the questions now becomes: which one do I trust? I know that there is really no way of knowing which one is more accurate without knowing what the true laboratory value would be. I will get another blood draw in October to test A1C and will try to replicate this experiment at that time. But in the meantime, what would you do? Which meter would you trust?