Carrier frequencies of HLA-DRB1in the Indian ethnic group by ACPA status.

*The frequency of DRB1 genotypes in ACPA subgroups was calculated as the number of ACPA-positive or ACPA-negative RA cases for a specific DRB1 allele divided by the total number of cases within that ACPA subgroup (Indian: 200 ACPA-positive RA cases and 96 ACPA-negative RA cases).§Individuals without the allele being investigated were used as the reference group for the calculation of odds ratio (OR) and 95% confidence interval (95% CI).Corrected p (pc) values were obtained by multiplying the uncorrected p values by 13.NS: not significant.