Research Article

Association of PTPN22 Haplotypes (−1123G>C/+1858C>T) with Rheumatoid Arthritis in Western Mexican Population

Figure 1

Levels of anti-CCP autoantibodies according to homozygous haplotypes of the PTPN22 −1123G>C and +1858C>T SNPs. GC nonrisk haplotype and CT risk haplotype. The medians and interquartile ranges of the parameters are represented as a black line. Levels of anti-CCP are given in international units (U/mL) according to the Axis Shield Company.