BMI (underweight = 3.9 ± 2.5; normal-weight = 10.3 ± 2.3; obesity-1/class I obesity = 4.1 ± 2.3; obesity-2/class II/III obesity = 2.4 ± 1.4) and depression were not significant for IL-2. Here, IL2 is linked to major depressive disorder.