Table 2.

Corrected indices of model difference and performance

	Base model	Base model + POC lactate	RETTS	RETTS + POC lactate	POC lactate
Somer’s Dxy	0.621	0.623	0.334	0.368	0.143
Nagelkerke’s R2	0.349	0.352	0.136	0.144	0.018
Brier score	0.16	0.159	0.196	0.194	0.216
Gini's mean difference	1.589	1.597	0.669	0.754	0.282
Overall quality	0.287	0.289	0.102	0.109	0.012

Overall quality: Logarithmic accuracy score, a scaled version of the log-likelihood achieved by the predictive model

POC: Point-of-care; RETTS: Rapid emergency triage and treatment system