GPT and dermatomyositis: In patients with IIMs and DM, correlation analysis revealed that the serum PMN elastase level was positively associated with CK (r = 0.308 and 0.339, both P < 0.01), LDH (r = 0.366 and 0.386, both P < 0.01), ALT (r = 0.437 and 0.406, both P < 0.001), and AST (r = 0.438 and 0.454, both P < 0.001).