Table 5.

Sensitivity analysis: model discrimination for subgroups

Variable	Derivation cohort		Validation cohort
	Number of discharges	Model c-statistic	Number of discharges	Model c-statistic
Total	1 428 824	0.907	770 523	0.903
Age
Age <65	744 160	0.939	405 566	0.935
Age ≥65	684 664	0.863	364 957	0.856
Teaching status
Teaching	915 321	0.903	496 452	0.900
Non-teaching	513 503	0.910	274 071	0.904
Number of beds
≤300	751 677	0.909	400 131	0.903
>300	677 147	0.907	370 392	0.903
Urban/rural status
Urban	1 198 334	0.908	655 528	0.903
Rural	230 490	0.905	114 995	0.900
Medical/surgical discharges
Medical	939 081	0.903	514 932	0.897
Surgical	489 743	0.910	255 591	0.910