Fig. 2

Type I IFN score using RT-qPCR at baseline and 24 weeks after the initiation of abatacept treatment. The expression levels of OAS3, MX1, and IFIT3 were determined by using RT-qPCR to calculate the type I IFN score for the same RNA samples of microarray analysis (Fig. 2). p < 0.05 was considered statistically significant. *p < 0.05, **p < 0.01, ***p < 0.001. R, responders; N, non-responders; N.S. not significant