The lab your dr is using may be using an ANA test that does not report the number in a titer fashion.
There is an ANA that reports the value in a number-which seems to be the one you had done.
The titer is one where they take the blood and dilute it until there is no autoimmunity noted.The titer you end up with is the last dilution that they had to perform until there was no abnormality noted in your blood sample-each dilution doubles the titer number resulting in the diagnostic read.
So one dilution(and then if no abnormality noted)would be a titer of 1:40 as a result
two dilutions would be 1:80(if they detected abnormality at 2nd dilution but none at the 3rd)
three dilutions would be 1:160(if they detected abnormality at 3rd dilution but none at the 4th and so on)
four dilutions would 1:320
5 would be 1:640
Hope this helps some and take care.
SLE w/Sjogrens Overlap and Raynaud's diagnosed in 2007.Fibro in 2009.
The Early Bird May Get The Worm But the Second Mouse Gets The Cheese.