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Blood Testing Reference Ranges Vs "positve" For Celiac

woolwhippet

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woolwhippet Explorer
woolwhippet
Posted

I had the ttg-iga test done and was told the results were negative. I had 4.0 and to be positive (I am assuming positive for possible celiac disease) you would need to be 10.0 or more. Then today I noticed that the lab who ran the test had redone their website and one of the improvements was to post all reference ranges for the tests they do. According to them normal is .7 to 4.0.

My question is: what is this area between 4.0 and 10.0? Am I misunderstanding something here? Does the 10.0 correlate with villous atrophy?

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confused Community Regular
confused
Posted

Can you call the lab and seen when they changed their reference ranges and maybe ask them why. How long ago did you have yours done.

paula

nora-n Rookie
nora-n
Posted

If you read around here, tests do not correlate at all with villious atrophy.....

Some have weak tests, some negative and some have strong positive tests with villious atrophy.

maybe the 4-10 range is the grey zone and you had a very very weak positive and they told you it was negative. It would have been usefult to know so you could have had a biopsy.

nora

woolwhippet Explorer
woolwhippet
Posted
  • Author

Thanks again Nora!

tarnalberry Community Regular
tarnalberry
Posted

different labs run the tests somewhat differently, and so will have different reference ranges. where did you see the 10.0 for a positive versus the 4.0?

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