NFKB1 and allergic rhinitis: When this model was adjusted for gender, cigarette smoking, exercise before tests, asthma, allergic rhinitis, NF-κB (EBC), and PEFR (%), the RL2 group and the Nano-TiO2 exposure group showed significantly increased risk in FENO in comparison to the control group (AORs: 2.16 and 5.56; 95% CI: 1.03–4.51 and 1.57–19.72, respectively).