Baseline demographic and clinical variables
Selection of the study cohort is described in figure 1 . In 2010–2017, a total of 25,260 hospital admissions having coded a TEVAR procedure were estimated, of which 52.7% (n= 13,322) and 47.2% (n= 11,938) were secondary to an DTAA and type B dissection, respectively. The median age of the cohort was 69 years (IQR 59-77), with 40.7% (n= 10,297) being female and 55% (n= 13,901) catalogued as elective admissions. Most of the included admissions had hypertension as a comorbidity (85.7%, n= 21,663), followed by dyslipidemia (46.9%, n= 11,856) and coronary artery disease (31.4%, n= 7,948). Furthermore, 54.8% (n= 13,859) of the admission were from patients whose median household incomes fell under the 50th percentile (30.2% in the <25th and 24.6% in the 25-50th percentile). Regarding hospital characteristics, 83.3% (n= 21,041) and 74.2% (n= 3,758) of TEVARs were performed in Urban non-teaching and in large bed size hospitals, respectively.