. 2022 May 3;14(5):e24682. doi: 10.7759/cureus.24682

Table 5. ROC curve analysis of basic ABG parameters and lactate as prognostic markers.

#AUC for predicting mortality below cut off value

$AUC for predicting mortality above cut off value

^aUnder the nonparametric assumption

^bNull hypothesis: true area = 0.5

Test Result Variable(s)	Area	Std. Error ^a	Asymptotic Sig. ^b	Asymptotic 95% Confidence Interval		Cut off	Sensitivity (%)	Specificity (%)
Test Result Variable(s)	Area	Std. Error ^a	Asymptotic Sig. ^b	Lower Bound	Upper Bound	Cut off	Sensitivity (%)	Specificity (%)
PH	0.766#	0.045	<0.0001	0.679	0.854	7.455	7.9	98
PO₂	0.683#	0.050	<0.0001	0.584	0.782	80.1	75.4	61.2
Bicarbonate	0.747#	0.045	<0.0001	0.659	0.835	21.9	62.3	81.6
PCO₂	0.568$	0.059	0.172	0.453	0.682	44.1	86.6	46.9
Lactate	0.887$	0.029	<0.0001	0.829	0.944	2.65	82.5	81.6