I'm not sure what all of those tests specifically test for, but the test that they normally use for rheumatoid arthritis is the RF (rheumatoid factor). If you have a positive RF, it means you are making abnormal antibodies in your blood that are consistent with RA, but also with a host of other autoimmune diseases (Lupus, Scleroderma, etc....). So, you can see that it is not accurate in pinpointing RA, but it helps. A lot of people have RA, though, and don't have a positive RF. I'm sure that Erin, our resident nurse can explain a bit more to you.
Current dx: Rheumatoid Arthritis
Suspected dx: Early Lupus/MCTD
Current Meds: Enbrel, Plaquenil, Aciphex, Ultracet, Zyrtec, Allavert-D, Zantac, Tylenol PM
Past Meds: Relafen, Vioxx, Mobic, Voltaren, Sulfasalazine, Entocort, Prednisone, Humira, Reglan