Table 1 Additive effect of HLA-B27 positivity and maleness in r-axSpA patients. Comparison of the prevalence of L+LM+ vs L+ in B27+ male vs B27+ female patients (mSASSS < 10 and mSASSS > 11). About 90% of male patients vs 50% of female patients have the L+LM+ pattern, though all patients are B27+. Pearson’s chi-square test was used to determine the significance
