PLBD1 and idiopathic pulmonary fibrosis: The results indicated that the increased expression of the gene MS4A4A was associated with a higher risk of IPF (OR = 1.275, 95% CI: 1.029–1.579, p = 0.026), whereas the elevated expression of PLBD1 was found to have a protective effect against IPF (OR = 0.775, 95% CI: 0.607–0.988, p = 0.040) (Figure 10A).