There was no statistically significant association between TGF-β1 rs1800470 polymorphism and PF in any of the ethnic and disease subgroups (Table 2), except that there was a trend that the frequency of pulmonary fibrosis was less in genotype TT than that of other genotypes with respect to homozygote comparison model (TT vs CC: OR [95% CI] = 0.79 [0.52, 1.21]) and dominant model (TT vs TC + CC: OR [95% CI] = 0.75 [0.51, 1.10]) among Asians. The gene discussed is TGFB1; the disease is pulmonary fibrosis.