The results showed (Table 4) that factors influencing the QoL scores of RA patients included: BMI (P = 0.030), transportation (P = 0.020), sleep duration (P < 0.001), psychological counseling (P < 0.050), ESR (P = 0.040), C4 (P = 0.040) and IgA (P = 0.030) levels. This evidence concerns the gene CD79A and rheumatoid arthritis.