Type A acute aortic dissection (TA-AAD) patients are prone to life-threatening complications and death during the acute phase. Currently, little evidence is available with regards to the relationship between eosinophils (EOS) and TA-AAD.

A total of 274 patients with TA-AAD were eligible for inclusion and 54 patients deceased within 1 month following surgery. Multivariate regression analysis, the general linear model repeated-measures ANOVA analysis (corrected by Greenhouse-Geisser test), receiver-operating characteristics (ROC) curves and a Kaplan-Meier curve were applied for statistical analysis.

For this study, 274 patients with TA-AAD admitted into our hospital between February 2019 and July 2021 were enrolled retrospectively. A total of 54 patients deceased unfortunately within 1 month following surgery. We compared baseline sociodemographic, clinical, and functional status based on the main outcome using t tests or Mann-Whitney U test for continuous data and χ2 or Fisher's exact tests for categorical data. Continuous variables were expressed as mean SD median depending on the normality of distribution, and categorical variables were expressed as absolute number along with their percentages and compared using the chi-square test. Multivariate regression analysis was applied to assess the association between EOS and 1-month mortality in an unadjusted model, in an age-, sex-, Body mass index (BMI)-adjusted model (model 2), adjusted for age, sex, BMI, systolic blood pressure (SBP), diastolic blood pressure (DBP) and mean arterial pressure (MAP) (model 3), and further adjusting for age, sex, BMI, SBP, DBP, MAP, heart rate (HR), diabetes, stroke and hyperlipidemia (model 4). In addition, the general linear model repeated-measures ANOVA analysis (Corrected by Greenhouse-Geisser test in nonspherical cases) was used to compare preoperative EOS and postoperative eight-days EOS. For prognostic analysis, receiver-operating characteristics (ROC) curves were used to determine the optimal cutoff of EOS at different points and the time of postoperative EOS to return to normal levels for the prognostic events. A Kaplan-Meier curve was then applied to compare the prognosis between the 2 subgroups based on the predictive threshold. A P value<0.05 was regarded as statistically significant for all statistical tests.

Inclusion Criteria:

• The patients with a diagnosis of Type A acute aortic dissection by the computer tomography

Exclusion Criteria:

• History of cardiogenic shock or cardiac tamponade;
• Iatrogenic aortic dissection;
• Traumatic aortic dissection;
• Severe valvular disease;
• Congenital heart disease;
• Severe organ dysfunction, such as liver and kidney failure;
• Metabolic diseases such as gout or hyperthyroidism;
• Malignant tumor;
• Severe gastrointestinal diseases;
• Recent drug usage that might affect EOS;
• Allergic diseases;
• Infectious diseases;
• Skin diseases;
• Hematological diseases, such as leukemia and myelodysplastic syndromes;
• Immune system diseases.

The patients were dignosed with Type A acute aortic dissection by the computer tomography between February 2019 and July 2021. A total of 54 patients deceased unfortunately within 1 month following surgery. Depending on mortality within 1 month, the baseline characteristics was compared. Patients were 51.58±11.57 years of age, 203(74.1%) men, and 161(58.8%) with hypertension. There was no discernible difference in gender, BMI, smoking, and alcohol consumption (P>0.05). Moreover, in addition to renal insufficiency, medical histories showed no remarkable deviations between the aforementioned two groups. Non-survivors within 1 month were more likely to have renal insufficiency (6.8% vs. 20.4%; P=0.005).