Significant differences between severe and mild–moderate psoriasis were found for median glucose (101.5 mg/dL vs. 92 mg/dL), triglycerides (135 mg/dL vs. 103 mg/dL), the percentage of patients with metabolic syndrome (45% vs. 21%), and nadir CD4+ lymphocyte count (124.5 cells/mm3 vs. 230 cells/mm3) (Table 1). Here, CD4 is linked to psoriasis.