Table 3. Univariable analysis showing the risk factors of post-hospital discharge mortality among the surgically treated aTAAD patients (N=952).

Risk factor	HR (95% CI)	P value
EuroSCORE II (%)
Score 0–4	Ref	Ref
Score 5–8	2.19 (1.08–4.71)	0.03
Score >8	5.10 (2.89–8.33)	<0.001
Female	1.40 (0.80–2.50)	0.20
Age (years)	1.04 (1.02–1.07)	0.001
ICU stay (days)	1.05 (1.02–1.07)	<0.001
Ventilator use (days)	1.002 (1.001–1.003)	<0.001
Aortic diameter
<32 mm	Ref
≥32 mm	1.68 (0.09–7.94)	0.61
EF
EF (55−75%)	Ref
EF (<55%)	0.66 (0.04–3.10)	0.68
PLT
PLT (150–300/μL)	Ref
PLT <150/μL	1.28 (0.54–2.81)	0.55
PLT >300/μL	1.01 (0.16–3.52)	0.99
CPBT (min)	1.01 (1.00–1.01)	<0.001
ACCT (min)	0.99 (0.98–1.00)	0.12
Albumin
At admission (<25 g/dL)	3.17 (1.10–7.24)	0.01
After surgery (<25 g/dL)	4.11 (1.69–8.60)	<0.001
Creatinine
At admission (>115 μmol/L)	0.68 (0.39–1.20)	0.17
After surgery (>115 μmol/L)	3.54 (1.94–6.91)	<0.001
BUN
At admission (>8.2 mmol/L)	1.42 (0.80–2.63)	0.24
After surgery (>8.2 mmol/L)	1.92 (0.98–4.22)	0.08

ACCT, aortic cross-clamping time; aTAAD, acute type A aortic dissection; BUN, blood urea nitrogen; CI, confidence interval; CPBT, cardiopulmonary bypass time; EF, ejection fraction; EuroSCORE, European System for Cardiac Operative Risk Evaluation; HR, hazard ratio; ICU, intensive care unit; PLT, blood platelet level.