Table 1 Genotype distribution and allele frequencies of IL-6 gene polymorphisms in RA patients and control individuals
 | Genotypes/ | RA | Controls | P | Odds | 95%confidence |
---|---|---|---|---|---|---|
SNPs | Alleles | (n = 256) | (n = 331) | value | ratio | interval |
rs1800795 | GG | 247(96.5%) | 329(99.4%) | 0.049 | 3.235 | 1.005–10.412 |
 | GC | 7(2.7%) | 1(0.3%) |  |  |  |
 | CC | 2(0.8%) | 1(0.3%) |  |  |  |
 | G | 501(97.9%) | 659(99.5%) | 0.016 | 4.823 | 1.338–17.379 |
 | C | 11(2.1%) | 3(0.5%) |  |  |  |
rs1800796 | CC | 108(42.2%) | 138(41.7%) | 0.476 | 1.095 | 0.854–1.404 |
 | CG | 125(48.8%) | 152(45.9%) |  |  |  |
 | GG | 23(9.0%) | 41(12.4%) |  |  |  |
 | C | 341(66.6%) | 428(64.7%) | 0.486 | 1.090 | 0.855–1.390 |
 | G | 171(33.4%) | 234(35.3%) |  |  |  |
rs1800797 | GG | 249(97.3%) | 330(99.7%) | 0.076 | 3.419 | 0.879–13.305 |
 | GA | 5(1.9%) | 0(0%) |  |  |  |
 | AA | 2(0.8%) | 1(0.3%) |  |  |  |
 | G | 503(98.2%) | 660(99.7%) | 0.024 | 5.905 | 1.270–27.448 |
 | A | 9(1.8%) | 2(0.3%) |  |  |  |
rs1524107 | TT | 99(38.7%) | 143(43.2%) | 0.376 | 1.116 | 0.875–1.422 |
 | TC | 125(48.8%) | 148(44.7%) |  |  |  |
 | CC | 32(12.5%) | 40(12.1%) |  |  |  |
 | T | 323(63.1%) | 434(65.6%) | 0.380 | 1.114 | 0.876–1.417 |
 | C | 189(36.9%) | 228(34.4%) |  |  |  |
rs2069840 | CC | 199(77.7%) | 278(84.0%) | 0.057 | 1.435 | 0.990–2.081 |
 | CG | 52(20.3%) | 49(14.8%) |  |  |  |
 | GG | 5(2.0%) | 4(1.2%) |  |  |  |
 | C | 450(87.9%) | 605(91.4%) | 0.050 | 1.462 | 1.000–2.138 |
 | G | 62(12.1%) | 57(8.6%) |  |  |  |
rs1474347 | TT | 243(94.9%) | 326(98.5%) | 0.019 | 3.488 | 1.227–9.915 |
 | TG | 13(5.1%) | 5(1.5%) |  |  |  |
 | GG | 0(0%) | 0(0%) |  |  |  |
 | T | 499(97.5%) | 657(99.2%) | 0.020 | 3.423 | 1.212–9.665 |
 | G | 13(2.5%) | 5(0.8%) |  |  |  |