IL2 and Alzheimer disease: Indeed, the aMCI group had higher IL-2 levels (1.19 ± 0.53) than the control (0.95 ± 0.29) and AD (1.09 ± 0.62) groups, but there was no statistical significance (aMCI vs controls, p = 0.165; aMCI vs AD, p = 0.460).