NFKB1 and irritable bowel syndrome: In patients with IBS vs. controls, there was greater expression of NF‐κB: 5.33 ± 3.39 vs. 3.08 ± 1.19 (p < 0.01) (Figure 5A) and lower expression of Nrf2: 3.87 ± 2.99 vs. 7.56 ± 2.59 (p < 0.05) (Figure 5B).