We have had discussions about ESR and disease activity. It seems that over 40% of those of us with AS do not have elevated ESR during episodes (flares), and many of these do not 'indicate' through elevated CRP, either.
I have asked several medical people (microbiologists), and they agree it would be interesting to find out whether individuals who 'indicate' with elevated numbers have similar blood types.
I'm type O positive and I do indicate (ESR; CRP unknown).
Regards to all,
John