Table 2: Allelic and genotypic frequencies for the XRCC1 Arg399Gln polymorphism in SLE patients and controls.

Polymorphism Genotypics Patients Controls OR IC 95% P
n=76 (%) n=82 (%)
XRCC1 Arg/Arg 44 55.70 35 44.30 1.00
Arg399Gln Arg/Gln 23 46.00 30 54.00 0.61 (0.30;1.22) 0.166
Gln/Gln 9 37.50 17 62.50 0.42 (0.17;1.04) 0.062
Arg/Gln + Gln/Gln 32 40.51 47 59.49 0.54 (0.29; 1.02) 0.056
Allelle frequency Arg 111 52.61 100 47.39 1.00
Allelle frequency Gln 41 39.05 64 60.95 0.58 (0.36; 0.93) 0.023

OR = Odds ratio; CI95% = 95% confidence interval; p = p-value of the chi-square test.