. 2020 Mar 26;13:271–283. doi: 10.2147/RMHP.S228415

Table 7.

ICU Stay: AUC Analysis for APR-DRG Measures and the Queralt Dx Index

Principal Discharge Diagnosis	APR-DRG Severity			APR-DRG Risk			APR-DRG Severity (Excluding Age*)			APR-DRG Risk (Excluding Age*)			Queralt Dx
Principal Discharge Diagnosis	AUC	95% CI		AUC	95% CI		AUC	95% CI		AUC	95% CI		AUC	95% CI
All	0.827	0.823	0.832	0.823	0.819	0.828	0.801	0.796	0.806	0.782	0.776	0.787	0.843	0.839	0.847
Colon cancer	0.903	0.862	0.944	0.906	0.866	0.946	0.897	0.854	0.939	0.899	0.856	0.942	0.911	0.876	0.947
Pancreatic cancer	0.969	0.942	0.997	0.966	0.935	0.996	0.943	0.891	0.994	0.947	0.899	0.996	0.955	0.914	0.996
Lung cancer	0.916	0.883	0.949	0.909	0.873	0.945	0.912	0.878	0.945	0.902	0.865	0.939	0.913	0.880	0.947
Leukemia	0.931	0.890	0.971	0.941	0.906	0.975	0.882	0.815	0.949	0.865	0.791	0.939	0.951	0.919	0.983
AMI	0.923	0.913	0.933	0.923	0.913	0.934	0.922	0.911	0.932	0.922	0.912	0.932	0.927	0.918	0.937
Arrhythmia	0.917	0.896	0.937	0.932	0.914	0.950	0.906	0.880	0.932	0.915	0.890	0.941	0.933	0.915	0.951
HF	0.893	0.869	0.917	0.887	0.860	0.914	0.855	0.826	0.883	0.836	0.807	0.866	0.905	0.881	0.929
CeVD	0.869	0.852	0.885	0.874	0.858	0.891	0.836	0.818	0.853	0.836	0.818	0.854	0.894	0.879	0.909
Pneumonia	0.926	0.906	0.945	0.909	0.887	0.931	0.890	0.866	0.914	0.858	0.829	0.887	0.926	0.905	0.947
Influenza	0.932	0.902	0.961	0.919	0.886	0.951	0.883	0.837	0.928	0.860	0.816	0.905	0.947	0.924	0.969
Acute bronchitis	0.909	0.880	0.938	0.911	0.882	0.940	0.839	0.802	0.877	0.836	0.798	0.874	0.927	0.895	0.958
COPD	0.895	0.853	0.938	0.901	0.870	0.931	0.881	0.834	0.929	0.876	0.842	0.910	0.932	0.902	0.963
Resp. failure	0.898	0.868	0.928	0.857	0.818	0.895	0.869	0.833	0.905	0.774	0.725	0.823	0.863	0.825	0.900

Notes: *Age not included as covariate in these regression models in order to prevent overfitting. Results presented as AUC and 95% confidence intervals. All models adjusted for sex, type of admission, center, and age unless stated otherwise. “Queralt Dx” includes principal diagnosis, pre-existing comorbidities, and in-hospital complications.

Abbreviations: AMI, acute myocardial infarction; APR-DRG, All Patients Refined Diagnosis Related Groups; AUC, area under the curve; CeVD, cerebrovascular disease; COPD, chronic obstructive pulmonary disease; HF, heart failure; ICU, intensive care unit.