Table 4. Independent predictors of in-hospital mortality among octogenarians.

	Model A			Model B
Model A included eGFR as a continuous variable; Model B included dichotomized eGFR; eGFR: estimated glomerular filtration rate according to the CKD-EPI equation expressed in mL/min per 1.73 m2.
Variables	OR (95%CI)	P-value	Variables	OR (95%CI)	P-value	Additive score
Age ≥ 85 yrs	2.242 (1.303–4.511)	0.005	Age ≥ 85 yrs	2.399 (1.312–4.385)	0.004	1
eGFR	0.970 (0.956–0.986)	< 0.001	eGFR < 45 mL/min per 1.73 m2	1.904 (1.014–3.572)	0.045	1
Invasive ventilation	3.806 (1.675–8.650)	0.001	Invasive ventilation	3.801 (1.721–8.396)	0.001	2
Mesenteric malperfusion	4.758 (1.314–17.226)	0.017	Mesenteric malperfusion	4.145 (1.181–14.555)	0.026	2
Aortic root replacement	4.325 (1.991–9.395)	< 0.001	Aortic root replacement	4.304 (2.001–9.256)	< 0.001	2