IL17A and idiopathic pulmonary fibrosis: After adjusting for age, sex, and smoking, BAFF levels were independently associated with non-IPF (adjusted odds ratio [aOR] = 0.001, 95% confidence interval [CI]: 0–0.076, p = 0.008), while IL-17 levels were not (aOR = 0.51, 95% CI: 0.15–1.35, p = 0.21) (Table 2).