Hi Tacitus,

Perhaps I am misinterpreting this. If approx 6% of the population is HLAB27+, and only 1/2% of that same population has AS. Included in that 1/2% are people that have AS and are HLAB27-. Doesn't that mean most of the people that are HLAB27+ do not have AS?

How do you understand this?

Last edited by RAHMBA; 01/28/14 09:08 PM.

AS, U C, Iritis, migraines. HLA-B27neg. Yoga (instructor) & spin. No meds at this time. Dx 1989. SAA member/donor since 1993. All my posts are personal opinion/feelings and do not represent the SAA. Help find a cure & support others by donating to the SAA.