Supplemental Material for: Vertical Vessel Proportion as a Predictor of Vascular-Targeted Photodynamic Therapy Efficacy in Port-wine Stains: A Prospective Observational Study

This dataset contains the supplemental materials for the brief report titled "Vertical Vessel Proportion as a Predictor of Vascular-Targeted Photodynamic Therapy Efficacy in Port-wine Stains: A Prospective Observational Study", published in the Journal of the American Academy of Dermatology (JAAD). The files provided include: Representative clinical photographs and OCTA en face images of responders and non-responders (Fig S1-S2). Algorithmic schematics illustrating the projection of 3D vascular orientations onto a 2D plane (Fig S3). Comparative ROC curve analysis of VVP against conventional structural metrics (Fig S4). Detailed baseline demographics and multivariable regression analysis results (Tables S1-S2). Detailed MATLAB pseudocode outlining the custom image-processing pipeline for VVP quantification (Text S1). These materials provide comprehensive methodological details and support the clinical findings regarding the predictive value of vertical vessel orientation in PWS treatment outcomes.