The SSA and SSB tests are looking to see if your body has antibodies that attack the SSA and/or SSB proteins. These proteins are normally found inside your cells, so normal people shouldn't have any antibodies (which are designed to attack things) against them. It's sort of like having a gun that automatically targets your foot...not a good thing!
Positive SSA/SSB test results are seen in people with connective tissue diseases (lupus, RA, and, especially, Sjogren's syndrome). That's why doctors test for it-- it's a sign that your immune system is out of wack.
High levels of calcium oxalate can cause kidney stones. Although oxalate can be found in healthy people, if you have too much of it in your blood, it may be a sign of kidney troubles.