GOT1 and vitamin D deficiency: In multivariate analysis, vitamin D deficiency remained independently associated with biologic therapy (aOR = 0.374; 95% CI: 0.148–0.946), platelet count (aOR = 0.996, 95% CI: 0.992–0.999), and SGOT (aOR = 1.05, 95% CI: 1.00–1.10), indicating consistent links between vitamin D deficiency and treatment intensity, systemic inflammation, and nutritional or metabolic status.