|Patient Factora||Receiving Operation (%)||Nonemergent Operation (%)||Postoperative Mortality (%)||Mortality in Patients With No Operation (%)|
|Age <75, y||31.6||54.4||14.0||18.4|
|Age 75+, y||11.6||52.6||24.3||40.7|
|No major comorbidity||27.6||50.1||12.2||27.6|
|1+ major comorbidities||18.8||58.2||21.0||31.7|
|All patients combined||22.2||53.7||16.7||30.5|
HES indicates Hospital Episodes Statistics; TAD, thoracic aortic disease.
↵a Patients with neither dissection nor aneurysm recorded have been omitted from the rows for TAD subtype. Major comorbidities covered ischemic heart disease, cerebrovascular disease, chronic obstructive pulmonary disease, renal disease, and cancer. Mortality is defined as death in or out of hospital within 6 months of diagnosis or operation.