A normal sed rate is below 20. A normal CRP is below 5. My doc says the CRP is a better measure but both are helpful.
At my worst, my CRP hit 110 but I was very ill at that point, could barely move around and the pain was horrific. My sed rate was around 95 at that time. They've been coming down slowly since I've been on prednisone and methotrexate and now are in the low forties. It seems like I still have a fair way to go before I've got the inflammation fully under control.
I have RA, not AS, but it makes little difference in terms of inflammation - both are inflammatory arthritises.
