Negative associations of HLA alleles in DF patients in different races.

n = number of patients; P = p value derived from fisher exact test; OR = Odds Ratio; CI = confidence interval; PT = patients; CTRL = controls; AF = allele frequency in percentage; Number in bold indicate nearing significant P value; In Pearson chi-square analysis, where a value in a 2×2 table was 0, the OR and 95% CI could not be calculated (NA, not available).