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Table 2 Definitions of evaluation metrics

From: Predictive modeling for COVID-19 readmission risk using machine learning algorithms

Performance measures Definitions
Precision TP/(TP + FP)
Specificity/true negative rate (TNR) TN/(TN + FP)
Sensitivity/true positive rate (TPR) or Recall TP/(TP + FN)
Accuracy (TP + TN)/(TP + TN + FP + FN)
F-measure (2 × Precision × Recall)/ (Precision + Recall)
  1. *True positive (TP), true negative (TN), false positive (FP), false negative (FN)