One touch Ultra 2 = 117,132,121 with an average = 123 standard deviation = 7.8
Accucheck Aviva = 157,148,148 with an average = 151 standard deviation = 5.2
These 6 readings were done at the same time under fasting conditions using individual pricks on individual fingers for each reading, it was painful.
The precision of both meters is good based on the low SDs. Take as guess which one is more accurate based on your knowleadge of the meters and I will post the lab result later. Let us see who will be the meter champion.
I have been testing the accuracy of my meters as well. I will post my fasting blood sugars tomorrow. I would be interested to see as many meters as we can compare (from people who have good test strip insurance coverage)!
D-Cont Personal Optimum = 149, 142, 142 with an average = 144 standard deviation = 4.0
(a meter produced by Elektronika 77, a Hungarian company, uses a special technology reviewed by David Mendosa as very accurate, my primary meter because test strips are covered by the government)
Wavesense Presto = 186, 170, 173 with an average = 176 standard deviation = 8.5
Note that I used the same finger as I wanted to minimze pokes on my already callous fingers. The D-Cont Personal Optimum seems to be much more consistent (at other times as well). What I find surprising is that the pattern is always this way that the Wavesense Presto returns higher values than the D-Cont Personal Optimum. So which should I trust?
The difference in readings from the 2 meters is horrible. The D-Cont readings means that you are under reasonable control acording to my Endo that is not very fussy and the Wavesense readings would indicate very poor control.
This is in spite of the precision of both meters being good. So I guess we can conclude that precision is an insufficient quality to insure accuracy.
The only way is to check against the lab results which we only get to do once in a while.
The better question would be if your meter gives you high readings like the Accucheck Aviva, do you feel like you are going low after you do a correction bolus? If the answer is yes then I would say the Accucheck is not doing its job but if you say no then the One touch ultra needs to be looked at.
Thanks for the feedback! My feeling is that the D-Cont meter is accurate because if I correct according to it, I do not go low, but when I correct according the the Presto, I go low. I have only tried this a few times. So I need to experiment more.
I will have lab work done soon and I will bring both with me.
or - 20 is horrible. 10 years ago I had a meter that was super accurate compared to the lab results it was ALWAYS exactly 5% below the lab result. The reason was that in those days it took 60 seconds for the reading not a inadequate 5 seconds which gives you the horrible accuracy your Endos report.
Accucheck meter was better than the one touch. The lab result was 140 and the accucheck readings were 157, 148,148. The one touch was seriously under at 117, 132 and 121. I prefer a meter that does not give you the false impression that your BG is ok. Funny that is you average the meter readings between the 2 different meters you would be close to reality. We are entitled to this crap because all meter companies have reduced the measuring time to 5 seconds instead of allowing the customer to chose one with a longer measuring time and more accuracy.
