Thank you all for your responses! I do appreciate them. I have to admit that the list is a bit overwhelming!
He wanted to wait because he thought it was possible that the test was wrong. One part of the test (sorry, don't remember what it was called) was a 5. He said that normal was a 4. He just wanted to be sure before we went gluten-free. She doesn't have any symptoms. It was caught in a routine blood test that she has done yearly. (She has Down syndrome and it was one of the battery of tests done.)
As an aside, one of my other children has Type 1 diabetes, but does not show symptoms of celiac's disease though he is tested for it yearly. Another child has been dx with ADHD. I honestly believe that a gluten-free diet may be of benefit to all of us. I'm planning to have all of us tested.
As an aside, is there a way to receive notices via email of responses to a post? Thanks!