Instant A1C tests

By Lizardfan Latest Reply 2012-10-16 22:17:28 -0500
Started 2012-09-09 13:14:47 -0500

How accurate do you think the instant reading A1C tests are that the doctor's office use? How do you think they compare to the lab based testings? My last test was with the instant one at the Joslin clinic and it was so low I was a bit skeptical!

12 replies

Lizardfan 2012-10-16 22:17:28 -0500 Report

Today was my Joslin appt. and once again I am wondering about the accuracy of A1C testing. As I posted before my last test was the instant test at the endo's office. My test result today was from the local hospital lab. Just as I thought my number went up one whole point! And to further complicate matters hubby had his done today and his instant test was almost one point lower than his last actual hospital lab test he took last time! Weird! I asked the nurse at Joslin were they sure that the testing unit was calibrated and she said they have to do the calibration all the time and measure it to make sure it is accurate. From now on, both of us are having our testing done instantly at Joslin so we will have consistent results the next time. Just thought I would post so you all would know my follow up A1C! By the way it was 6.2 and my numbers were much lower, I thought it would be about 5.5-5.9 range. Hubbys was 5.8.

2012-09-10 21:47:57 -0500 Report

I'm hoping that they are accurate. Because that's what I base my A1C with. Cause I don't trust those A1C meters that you purchase @ the store. I believe what my PCP tells me.

Lizardfan 2012-09-09 19:11:10 -0500 Report

Thanks ryver for a technical explanation! This was my first instant test and just was wondering if anyone else was skeptical too. My daily testing showed about what the actual test was but in the past I have been surprised by a higher A1C than I thought it was going to be by using daily testing data. I just hate surprises. I have to use a lab this next time, my appt. is in mid Oct. so we shall see how that one compares to the last one. Thanks!

draco59 2012-09-09 15:26:10 -0500 Report

it's just like comparing a meter reading with the same blood drawn and done at the same time, there's always a +/- factor. I was a lab tech for over 20 yrs… I was in charge of calibration the BS meters the floors use, and the was a 5% +/- with the meter with one drawn and ran in the lab… it was an acceptable range even today… but if your doctor is OK with the results, it should be alright… I can go into all the variables that can effect it, but it's to long for here. If it was me I'd take to your doctor about…

Harlen 2012-09-09 14:00:37 -0500 Report

When you test three or more times a day your meeter can give you a good point of refrence.I fined that they work well .
By and By way to go on your A1c .
Best wishes

jayabee52 2012-09-09 13:55:33 -0500 Report

I m wondering how you know the instant one was low? Had you compared it with a recently drawn A1c?

Lizardfan 2012-09-09 19:14:37 -0500 Report

No, I had one in April, a lab test, then one in July and it was the instant. I was *coming down* with my BS levels from my treatment change so it was probably accurate. Just hope it was.