“…The shared epitope was present in 55% of UK Caucasian controls and in 17% of North Indian and Pakistani controls. The frequencies of the shared epitope in the UK Caucasian RA patient and control groups or the North Indian and Pakistani RA patient and control groups were comparable to those found in previously reported studies (18)(19)(20)(21). The association of the shared epitope with RA was similar for the UK Caucasian and North Indian and Pakistani cohorts (OR 3.3, 95% CI 1.8-5.9, P ϭ 0.000 and OR 4.2, 95% CI 2.2-7.8, P ϭ 0.000, respectively).…”