Table 3.

Multivariate analysis of independent risk factors for POH after AADS.

Characteristics	Coefficient	Standard error	OR (95% CI)	P value
Female sex	1.082	0.247	2.951 (1.817–4.792)	<0.001
Age (years)	−0.052	0.008	0.950 (0.935–0.965)	<0.001
Smoking history	1.163	0.210	3.201 (2.121–4.831)	<0.001
Chronic headache history	1.235	0.239	3.437 (2.150–5.495)	<0.001
Cerebrovascular disease	0.956	0.222	2.602 (1.685–4.019)	<0.001
Cardiopulmonary bypass time (min)	0.011	0.002	1.011 (1.008–1.014)	<0.001
Intraoperative transfusion of RBC (units)	0.248	0.042	1.281 (1.181–1.390)	<0.001
Deep hypothermic circulatory arrest	1.283	0.195	3.607 (2.459–5.290)	<0.001
Constant	−4.134	0.559	0.016	<0.001

AADS, Stanford type A acute aortic dissection surgery; CI, confidence interval; OR, odds ratio; POH, postoperative headache; RBC, red blood cell.