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HLA-DRB1 genotype frequency in RA patients with or without CKD.
| CKD(+)RA (n = 351) | CKD(−)RA (n = 959) | p | OR | 95%CI | |
|---|---|---|---|---|---|
| DR6/not DR6 | 89 (25.4) | 163 (17.0) | 0.0009 | 1.66 | (1.24–2.23) |
| DR6/DR6 | 4 (1.1) | 9 (0.9) | 0.7558 | 1.22 | (0.37–3.98) |
Genotype frequencies are shown in parentheses (%). Associations were tested by Fisher’s exact test, using 2 × 2 contingency tables. RA: rheumatoid arthritis; CKD: chronic kidney disease; OR: odds ratio; CI: confidence interval.
