(a)
(b)
Figure 7: The relationship between the level of Nrf2 and the levels of proinflammatory cytokines. (a) The relationship between the level of Nrf2 and the level of IL-1 beta. (b) The relationship between the level of Nrf2 and the level of IL-6. Spearman’s rank correlation test was performed to compare two variables. There is a strong negative association if the value of rho falls between −1 and −0.5.