fig2

Figure 2. Unadjusted linear associations between age and aortic morphological parameters in the aTBAD group. Scatter plots illustrate the relationships between chronological age and aortic arch diameter (A), aortic arch length (B), ascending aorta angulation (C), and aortic arch tortuosity (D). R² represents coefficient of determination, indicating the proportion of variance explained by the univariable regression model. The slope coefficients represent the estimated change in each morphological parameter per 1-year increase in age. aTBAD: Acute type B aortic dissection.