Hi..was your daughter having other problems as to why the test may have been done?
Do you have a list of the other tests that were done? It might be in your best interests as well to get a copy....for future reference as well as knowledge through research as to why they'd be done.
This link might help in understanding why it's done and what it can achieve.
http://www.labtestsonline.org/understanding/analytes/ana/glance.html
Mine is very high as well....but I have autoimmune liver disease associated with UC, and other tests were done to either confirm or negate whether there was something else going on or whether it's related to the liver.
It's freaky sometimes to realise what all goes on in our bodies.
Welcome to the forum, by the way!
quincy