IFNG and rheumatoid arthritis: Moreover, positive correlations were shown between the transcript level of IFNG-AS1 and the level of RF (r = 0.5118, p = 0.0106) (Figure 1(b)), the ESR (r = 0.3821, p = 0.0309) (Figure 1(c)), and the level of CRP (r = 0.4751, p = 0.0069) in the RA patients (Figure 1(d)).