Objective
While sex differences in the pathogenesis, presentation, and outcomes of repair for abdominal aortic aneurysms are well studied, less is known about sex differences following thoracic endovascular aneurysm repair (TEVAR). The goal of this study was to evaluate the association between sex and morbidity and mortality following TEVAR.
Methods
A retrospective review of all TEVAR in the Society for Vascular Surgery Vascular Quality Initiative (SVS-VQI) registry from 2011–2015 was conducted, excluding those with dissection, trauma, and rupture. Statistical analysis was performed using the Fisher’s exact test and the Mann-Whitney U test for categorical and continuous variables. Multivariable logistic regression and Cox hazards modeling were used to account for differences in demographics, comorbidities, and aneurysm characteristics in 30-day mortality and long-term survival.
Results
We identified 2,574 patients (40% women) who underwent TEVAR. Women were older, less likely white, and had smaller aortic diameters but larger aortic size indices (aortic diameter/body surface area). Women also had more chronic obstructive pulmonary disease, but less coronary artery disease and fewer coronary interventions. Women were more likely to be symptomatic at presentation and subsequently have a non-elective procedure. Women had higher estimated blood loss (EBL > 500cc: 20% vs. 17%, P = .04), were more likely to be transfused (29% vs. 21%, P < .001), and more frequently underwent iliac access procedures (4.3% vs. 2.1%, P < .01). Operative time and left subclavian intervention were similar. Postoperatively, women had increased median hospital (5 vs. 4 days, P < .001) and intensive care unit lengths of stay (2.5 vs. 2, P < .001) and were less likely discharged home (75% vs. 86%, P < .001). Mortality was higher for women at 30 days (5.4% vs. 3.3%, P < .01) and one year (9.8% vs. 6.3%, P < .01). After adjusting for age, aortic size index, symptoms, and comorbidities, female sex remained independently predictive of 30-day (OR 1.5, 95% CI: 1.1–2.1, P < .01) and long-term mortality (HR 1.3, 95% CI: 1.03–1.6, P = .02).
Conclusions
Even after adjusting for differences in age and comorbidities, female patients have higher perioperative mortality and lower long-term survival following TEVAR. These findings, along with the rupture risk by sex, should be considered by clinicians when determining the timing of intervention.