Table 5.

Predictive performance of the simplified model for an extended testing data (COVID-19 confirmed cases during 1 May–9 Aug 2020), which was supplemented to this study when the manuscript was revised in mid-August 2020

	Simplified model* (based on 7 features)
	On Day 1 of admission			On Day 5 of admission#
	Predicted class			Predicted class
	Critical/serious	Stable	Satisfactory	Critical/serious	Stable	Satisfactory
Actual class
Critical/serious	187	13	23	207	7	9
Stable	227	1389	62	187	1480	11
Satisfactory	7	0	1076	18	0	1065
Sensitivity
By outcome class	83.9%	82.8%	99.4%	92.8%	88.2%	98.3%
Macro averaged	88.9%			92.2%
Micro averaged	88.9%			92.2%
Specificity
By outcome class	91.5%	99.0%	95.5%	92.6%	99.5%	98.9%
Macro averaged	97.2%			98.8%
Micro averaged	94.4%			96.1%
Accuracy	88.9%			92.2%

^*Model performance based on testing dataset (n = 2984)