The pattern observed in codominant HSPA1B (rs1061581) GA genotype was associated with a lower risk, compared with GG (OR = 0.22, 95 % CI = 0.07–0.65; p = 0.006), whereas the comparison AA vs GG displayed a stronger protective association with IPF (OR = 0.17, 95 % CI = 0.07–0.41; p = <0.001). The gene discussed is HSPA1B; the disease is idiopathic pulmonary fibrosis.