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Classification performance of XGBoost model for each group of subjects according to autoantibodies status (positive vs negative). Y axis shows the group subjects belong to. X axis shows the predicted (pred) classification. Data are shown as percentage. HC, healthy controls; IIM, idiopathic inflammatory myopathies; SLE, systemic lupus erythematosus; SjS, Sjogren’s syndrome; SSc, systemic sclerosis; UCTD, undifferentiated connective tissue disease.
