MB21D2 and hematocrit: Additionally, multiple genes, including chondroitin sulfate N-acetylgalactosaminyltransferase 1 (CSGALNACT1), glutamate receptor-interacting protein 1 (GRIP1), and T-cell receptor-associated transmembrane adapter 1 (TRAT1) were identified as potential risk factors for HT, and membrane-associated guanylate kinase inverted 3 (MAGI3), calcium/calmodulin-dependent protein kinase type IV (CAMK4), interleukin-7 receptor (IL7R), endoplasmic reticulum-to-nucleus signaling 1 (ERN1), and nucleotidyltransferase MB21D2 were identified as protective factors.