Table2. Multivariable analysis of risk factors for HAIs following surgical repair of acute TAAD.

Variables	OR (95% CI)	P value
X1: hospitalization over one day before surgical treatment	2.84 (0.84–9.62)	0.093
X2: DHCA time (>29 min)	2.60 (1.01–6.80)	0.048
X3: Preoperative PLT (<171*109/L)	3.62 (1.33–9.79)	0.011
X4: Preoperative D-dimer (>4.25 mg/L)	2.83 (1.07–7.47)	0.035

Significance level: alpha =0.05. PLT, platelets; DHCA, deep hypothermic circulatory arrest; CI, confidential interval; TAAD, type A aortic dissection.