Interpreting test results for Celiac

There are four basic tests that are used to diagnose Celiac these tests are IgA, IgG, tTG, and ELISA.  Of these tests the most commonly used are the IgA and the IgG tests.  Many people will get test results without knowing what those test results mean.  I have seen instances where the test results are mailed to the person with Normal, Abnormal, Low or High next to a number and a range.  Well that is completely useless for most of us since we have no baisis of what this means.