Research Article
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 |
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*CHF: congestive heart failure.
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