Table 4.

Discrimination and calibration of models in training dataset (n = 6798)

Model	Comorbidity measure	Area under curve (95% CI)	H-L statistic (p-value)	LR test (p-value)
Injury group	None	0.631 (0.618, 0.644)	0.67 (0.954)	-
Injury group and age group	None	0.704 (0.692, 0.716)	4.04 (0.854)	507.40 (<0.0001)
Injury group, age group and comorbidity	Number of ICD-10 chapters	0.728 (0.716, 0.740)	11.90 (0.156)	228.23 (<0.0001)*
Injury group, age group and comorbidity	ICD-10 chapters	0.729 (0.717, 0.741)	8.51 (0.386)	251.38 (<0.0001)*
Injury group, age group and comorbidity	Number of Haagsma conditions	0.724 (0.712, 0.736)	7.51 (0.482)	182.06 (<0.0001)*
Injury group, age group and comorbidity	Haagsma conditions	0.725 (0.713, 0.737)	7.05 (0.531)	194.03 (<0.0001)*
Injury group, age group and comorbidity	CCI weight category	0.720 (0.708, 0.732)	1.30 (0.996)	159.35 (<0.0001)*
Injury group, age group and comorbidity	FCI score	0.716 (0.704, 0.728)	7.10 (0.526)	102.39 (<0.0001)*
Injury group, age group and comorbidity	FCI conditions	0.716 (0.704, 0.728)	8.05 (0.429)	-

*compared to model including age group and injury group.