ELANE and dermatomyositis: The univariate areas under the curve (AUC) for PMN elastase were 0.665 (95% CI 0.55–0.78) for discriminating between patients with IIMs and HCs (P = 0.019; Fig. 1b) and 0.691 (95% CI 0.58–0.81) for discriminating between patients with DM and HCs (P = 0.009; Fig. 1b).