Propensity Score-Matched Analysis of Open Surgical and Endovascular Repair for Type B Aortic Dissection

Table 2

Baseline characteristics of emergently admitted patients undergoing open surgical repair or TEVAR for type B dissections from 2005 to 2008.

Variable	Unmatched cohort				Matched cohort
	Open repair; (n = 3427)	TEVAR; (n = 1325)	P value		Open repair; (n = 991)	TEVAR; (n = 991)	P value
	Mean or % of patients				Mean or % of patients
Female sex	37.2	38.9	0.642		35.5	40.4	0.309
Age
Mean age (years)	59.9	61.2	0.153		61.9	61.0	0.429
<60 yr	47.3	39.8	0.027		37.0	38.1	0.826
60–64 yr	10.5	12.9	0.302		12.2	12.8	0.868
65–69 yr	11.5	10.6	0.701		14.1	12.2	0.576
70–74 yr	9.9	11.9	0.393		13.0	13.5	0.890
75–79 yr	11.0	13.8	0.230		13.8	12.8	0.782
≥80 yr	9.8	11.1	0.511		9.9	10.7	0.751
Hospital bed size
Small	3.4	16.5	<0.001		5.5	7.2	0.550
Medium	14.9	12.0	0.446		13.6	15.4	0.683
Large	81.7	71.6	0.144		80.9	77.4	0.468
Teaching hospital	73.6	74.3	0.933		82.2	79.3	0.518
Mean annual TEVAR volume (n)	8.2	27.3	<0.001		15.1	15.4	0.894
Comorbid conditions
Cardiac comorbidities	54.9	39.9	<0.001		44.9	42.1	0.558
Cardiac arrhythmia	34.1	14.8	<0.001		15.3	16.8	0.648
Chronic CHF*	11.8	9.2	0.186		9.3	9.5	0.940
Coronary disease	10.1	17.5	0.004		19.4	17.0	0.556
Valvular disease	20.3	10.7	0.003		12.7	12.8	0.976
Chronic pulmonary disease	15.0	23.9	<0.001		25.3	24.0	0.755
Chronic renal failure	10.0	10.9	0.679		7.8	10.1	0.346
Coagulopathy	19.9	8.1	<0.001		9.0	10.3	0.666
Deficiency anemias	15.4	14.3	0.674		16.8	15.5	0.693
Diabetes	7.7	12.3	0.012		10.8	11.9	0.691
Hypertension	65.8	66.0	0.950		65.8	66.3	0.922
Obesity	7.1	4.6	0.142		3.9	4.4	0.782
Other neurological disorders	5.1	3.1	0.198		2.5	2.8	0.876
Paralysis	5.4	5.1	0.838		5.3	6.2	0.687
Peripheral vascular disease	14.9	32.6	<0.001		25.6	25.7	0.980

*CHF: congestive heart failure.