BackgroundIdentifying new biomarkers of major depressive disorder (MDD) would be of great significance for its early diagnosis and treatment. Herein. we constructed a diagnostic model of MDD using machine learning methods. MethodsThe GSE98793 and GSE19738 datasets were obtained from the Gene Expression Omnibus database. https://parisnaturalfoodes.shop/product-category/hairspray-fast-dry-sweet-pea/