Another testing question

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Regular Member

Date Joined Apr 2014
Total Posts : 53
   Posted 5/27/2014 9:38 AM (GMT -6)   
I looked for the answer in the Sticked Info folder at the top already. There is lot of info on ANA testing but I don't see anything on the sub-tests, or at least about the question I have.

On my blood results form, I've always looked at the "reference range" as a "normal range" if my numbers are IN the reference range, they're normal or unremarkable.

Looking at the other tests (ds-DNA, Sm/RNP, Centromere, SS-A, SS-B, etc.) the reference range usually says 0-25 or 0-30 (there are no units stated on the report). So I thought that if my result was, say, 2.3, since that was still in the reference range, I was negative for that line item. I was doing some reading last night, and some of the lab test sites state that for these tests, anything over 1.0 is considered positive and that the test has a MAX result of 25. Which would mean that 0-25 isn't the reference range, it's the entire possible range.

If that's true, then wouldn't results of 1.3 or 2.5 or 4.2 be considered positive? I know that probably the higher the number, the more significant the test result is (and higher positives might indicate something different than low positives), but at what point is the test considered *positive* at all?

Veteran Member

Date Joined May 2005
Total Posts : 7723
   Posted 5/27/2014 10:40 AM (GMT -6)   
Since different labs run tests different ways, you really have to go with the ranges provided by the individual testing sites. Your online research can help you determine which end of the range is generally "better" or "worse", but beyond that it isn't much help.

Lynnwood, Lupus & Sjogren's Moderator, Dx: 2002
"Life is far too important to be taken seriously." - Oscar Wilde

Regular Member

Date Joined May 2014
Total Posts : 68
   Posted 5/28/2014 7:06 PM (GMT -6)   
Ask for actual print outs of the blood test results. I have to do that with my rheumy. My rheumy used their own lab and gave me similar results with a 0-100 range and most of my results were numbers in between. There was nothing that indicated a unit of measurement or anything to explain the ranges. I've never seen blood test results that looked quite like that. I'm hoping the actual blood test results will make more sense than the mumbo jumbo the rheumy's office gave me the first time.

Regular Member

Date Joined Apr 2014
Total Posts : 53
   Posted 5/28/2014 7:19 PM (GMT -6)   
Thanks. I noticed yesterday that the lab now has their own patient portal-type thing and will send me an email as soon as the labs are posted -- no waiting for the doc appointment for the magic "reveal" -- so I signed up immediately (and the original lab reports have the units on them!). Also, unless my rheumy takes blood at her office, this is the lab I always use for everything else, so they also have a record of most of my blood work and I don't have to dig through my binder for the info.
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