Table 4 shows the results of the multivariate analysis. When the causes of death were analyzed according to the CD200 rs1131199 genotype the main raison was the progression of disease in both genetic groups (GG: 61.2% vs CC and CG pooled together: 55.2%), followed by infection (GG: 16.3% vs CC+CG: 15.6%) without detecting statistically significant differences between these groups (p: 0.914). This evidence concerns the gene CD200 and infection.