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

Table 3

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

Variable	Unmatched cohort				Matched cohort
	Open repair; (n = 680)	TEVAR; (n = 567)	P value		Open repair; (n = 282)	TEVAR; (n = 282)	P value
	Mean or % of patients				Mean or % of patients
Female sex	29.5	25.9	0.520		32.0	26.6	0.531
Age
Mean age (years)	58.3	63.0	0.008		60.7	62.0	0.485
<60 yr	50.4	37.2	0.040		46.1	44.3	0.842
60–64 yr	12.2	14.0	0.637		11.8	11.9	0.992
65–69 yr	11.9	14.7	0.548		10.8	12.4	0.822
70–74 yr	11.0	19.1	0.080		15.9	17.5	0.822
75–79 yr	10.2	11.0	0.852		8.6	8.7	0.978
≥80 yr	4.3	4.1	0.943		6.9	5.3	0.758
Hospital bed size
Small	4.4	17.3	0.022		7.9	9.3	0.739
Medium	18.5	16.1	0.743		19.5	19.9	0.970
Large	77.1	66.6	0.278		72.6	70.8	0.863
Teaching hospital	79.6	75.4	0.632		79.1	85.7	0.483
Mean annual TEVAR volume (n)	9.3	28.5	<0.001		14.1	14.7	0.656
Comorbid conditions
Cardiac comorbidities	53.1	39.6	0.048		42.2	37.5	0.635
Cardiac arrhythmia	18.8	17.0	0.700		23.1	16.6	0.323
Chronic CHF*	11.1	10.2	0.828		12.2	11.9	0.973
Coronary disease	16.2	23.1	0.233		15.9	16.7	0.916
Valvular disease	27.9	7.3	<0.001		8.3	11.8	0.504
Chronic pulmonary disease	18.2	23.6	0.309		19.5	24.4	0.496
Chronic renal failure	12.7	11.4	0.754		10.5	15.5	0.445
Coagulopathy	15.7	3.7	0.004		3.5	5.1	0.681
Deficiency anemias	10.2	8.4	0.632		10.5	12.0	0.801
Diabetes	9.8	19.6	0.030		10.7	14.0	0.554
Hypertension	65.4	85.0	<0.001		72.0	76.0	0.600
Obesity	8.3	13.9	0.129		11.0	8.6	0.690
Other neurological disorders	4.4	3.8	0.793		1.9	3.9	0.566
Paralysis	3.0	0.9	0.269		1.7	1.8	0.967
Peripheral vascular disease	19.7	27.6	0.131		21.3	27.7	0.409

*CHF: congestive heart failure.