Sex-Related Differences Between Patients Undergoing Surgery for Acute Type A Aortic Dissection.

Introduction This study aimed to evaluate the sex-specific characteristics and surgical outcomes in patients with acute type A aortic dissection (ATAAD). Materials and methods We reviewed the surgical records of patients who underwent ATAAD repair at our institution between 2004 and 2020 (n=213). Results Of the 213 patients, 100 (46.9%) were male, and 113 (53.1%) were female. Males were younger than females (62.5 vs. 72.9 years, p<0.0001). Females had more nonspecific symptoms (p=0.04), more frequently developed ATAAD before noon (45.0% vs. 53.1%, p=0.01), and had a significantly longer time from onset to surgery (425.1 vs. 595.8 min, p=0.03). The ascending aorta was replaced more frequently in females than in males (54.5% vs. 72.8%, p<0.01). No significant difference was observed in the in-hospital mortality rate between males and females (9.0% vs. 10.6%, p=0.69). The multivariable logistic analysis demonstrated that being male was not an independent predictor of operative mortality (OR, 0.96; 95% CI, 0.18-5.21; p=0.96). At 10 years, males had significantly better long-term survival rates in the unadjusted cohort than females (79.4% vs. 55.9%, p=0.02). Conclusions Male sex was not an independent predictor of early death in patients with ATAAD after surgery, although significant differences were noted in terms of age, onset time, chief complaint, imaging findings, and surgical procedures. A sex-based management strategy involving specific differences should be considered to improve outcomes.