Perhaps i will start using my left side fingers for testing, as my right handed fingers are completely shot with calluses. do you think that some of the discrepancies could be due to those calluses? hummmm
[quote=âHelmut, post:19, topic:47568, full:trueâ]
I should have quoted Anthonyâs post which compelled me to post. The only way to assess the accuracy of a BG meter is to compare it to something that is accurate. Comparing a BG meter to the dex makes no sense at all.
[/quote]This is so true! 20% accuracy is the rule but most meters today claim 15% accuracy. The best way to test your meter is to compare your meter with a blood glucose test performed in a laboratory. I always take a bg from my meter when I see the doc and labs are done.
Or, like others, you can just test all of your fingers on both of your hands and pick the number you like! LOL - My strips are expensive, I canât afford to do this kind of testing 
Helmut, I get your point. In statistical terms, a piece of equipment may be quite reliable (consistent with cgm for example) but not necessarily valid (accurate).
A measurement may be valid but not reliable, or reliable but not valid.
If your bathroom scale weighs 5 pounds light, it will be reliable each time you step on it. But it wonât be valid (true) because it is not reading your accurate weight.
Ditto BG meter and cgm. One or both can be reliable and/or accurate. Or valid sometimes but not reliably valid! Or reliable but not ⌠you get the point. Would need reliable and accurately calibrated lab instruments to get sound information on both the meter and the cgm. Canât be done with home tests. That is why the companies love the word âtrend.â It lets them off the hook re reliability and accuracy. Hence, 20% plus/minus. Sort of!
Karen57,
on this site i learned (for the 1st time) that diff finger stick testing has a certain reliability facor, similar to the dex. i tested once on my meter, then looked at the dex. very wide gap.
so, i tested again on my meter, much diff BG #. so i took the mean # and entered that into my MM pump Wizard. the mean number was very close to what the dex was reading. so, i tried this system more (more than I could afford) and i found that if i tested BG 3X w/ my finger stick, i got 3 diff BGs. i was really shocked. i could have been over or under blousing many more times than i ever expected. and after all these years, it makes sense to me why i may go low or high on diff occasions, when there seemed no rhyme or reason. typically, i would account for a strange high or low, post meal, based on my anxiety, nightâs sleep, whether i snuck a piece of my husbands cookiesâŚetc. (of course it could easily be all that and more) but now i have another reason which i can factor in. who would have thought, huh? 
Does that mean he made the cookies, or does he own them? 
he bought the cookies, so therefore he must in some regard âownâ them.
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