Fig. 1.

Results of ELISAs for anti-HSC70 autoantibodies

The dashed line of 100 arbitrary units indicates the cut-off values for anti-HSC70 autoantibody positivity. The average plus 3 s.d. among the group of healthy donors defined as 100 arbitrary units was 0.603 (optical density). The continuous lines indicate median and interquartile range of anti-HSC70 autoantibody levels. Plasma samples from 63 patients with JDM, 49 patients with JIA, and 40 sex- and age-matched healthy children (HC) were used for ELISA assays. Anti-HSC70 autoantibodies were detected in 35% of patients with JDM, in 0% of patients with JIA, and in 0% of HC.