Anti-gad 65 antibody levels

Hello,
Out of curiosity, I would like to know what figure of this antibody would be considered high levels, that is, more than 50 U/ml, more than 500 U/ml, its single presence-although is a small figure?
And I would also want to know if a figure of 810 U/ml indicates something significant in any sense.

Greetings and thanks, primers;).

Let's see if these links clarify something ...

Thank you,
The first article has been very interesting, although I actually continue with the same doubts he raised.

greetings,

It is that the values ​​alone cannot be evaluated, the method used must be seen: