Confusion matrix for each category of opioid requirement with true positive, true negative, false positive and false negative counts are shown.

Also, presented are the True Positive Rate (TPR), False Negative Rate (FNR), False Positive Rate (FPR) and True Negative Rate (TNR). Positive Predictive Value (PPV), False Omission Rate (FOR), False Discovery Rate (FDR) and Negative Predictive Value (NPV) are also presented.