Table 3.

Cox multivariable models for prediction of 18-month mortality in the derivation cohort (n = 315)

	Variable	Beta	HR	95% CI	p value
Model 1
	Heart failure (yes/no)	0.69	2.00	1.25–3.18	0.003
	CKD (yes/no)	0.65	1.91	1.12–3.30	0.01
	Liver disease (yes/no)	1.24	3.47	1.64–7.37	0.001
	Dementia	0.68	1.98	1.14–3.44	0.01
	Altered mental status (yes/no)	0.92	2.51	1.54–4.09	0.000
	RDW (%)	0.17	1.19	1.08–1.30	0.000
	Temperature (°C)	− 0.23	0.79	0.65–0.96	0.02
Model 2
	Charlson Comorbidity Index (every 1 point)	0.18	1.19	1.09–1.31	0.000
	Altered mental status (yes/no)	1.04	2.83	1.87–4.27	0.000
	RDW (%)	0.15	1.17	1.07–1.27	0.001
	Temperature (°C)	− 0.20	0.81	0.67–0.99	0.04
Model 3
	PSI class (every 1 class, I to V)	0.61	1.85	1.42–2.40	0.000
	RDW (%)	0.17	1.18	1.08–1.30	0.000
	Temperature (°C)	− 0.27	0.76	0.63–0.92	0.006

CKD chronic kidney disease, PSI Pneumonia Severity Index; RDW red cell distribution width