When we look at the correlations of the different IFN types with the core set measures assessing disease activity in DM, IFN-α correlates more with extra muscular domain (r=0.62 [0,47-0,73]) than muscle domain (CK: r= 0.29 [0,09-0,48] p<0.05 and MMT8: r= -0,31 [-0.48- -0.11] p<0.05). Here, IFNA1 is linked to dermatomyositis.