There is a sticky on the top of this page entitled criteria for diagnosing Lupus. It speaks about most of the tests used when diagnosing Lupus.
The values of some of the tests (such and ANA) can differ from one lab to another. The standard for ANA is usually around 1:60. Here are some websites that provides a detailed explanation of ANA titers, the significance of "speckled" and "diffused"; they also explain other tests used in the diagnostic process:
If, after reading these pages, you still have questions, please do not hesitate to come to us again.
I do hope that you find some answers that will alleviate some of your fears.
Peace and Blessings
Look For The Good and Praise It!