A straightforward approach to designing a scoring system for predicting length-of-stay of cardiac surgery patients

Table 4 Confusion matrix and correct-classification percentages obtained with the testing set

		Predicted class		Correct classification percentage
		LOS < 5 days	LOS ≥ 5 days
Actual class	LOS < 5 days	2403	492	83% (SP)
Actual class	LOS ≥ 5 days	93	268	74% (SE)
Overall correct-classification percentage: 82%

ISSN: 1472-6947