GPT and polymyositis: For example, Li et al. found that a higher AST/ALT ratio was an independent predictor of 1-year mortality in polymyositis-/dermatomyositis-associated interstitial lung disease, and it was associated with poor outcomes in renal cell carcinoma, head and neck carcinoma, oral and oropharyngeal carcinoma, and other malignant cancers [28].