Figure 1

Linkage analyses of 4 chromosomes for RA and anti-CCP levels using SNPs. LOD scores for binary outcomes (RA, CCP_binary), transformed quantitative traits (CCP_cat, Log_CCP), and untransformed quantitative trait (CCP_cont) were calculated using Merlin NPL, Merlin Regress, Merlin --deviates, respectively. The scale of the Y-axis for chromosome 6 is different.