MUC5B and interstitial lung disease: A stratified analysis of sex and age indicated that the T allele frequency in the MUC5B gene was significantly higher in older (≥55 years) male ILD patients than in the healthy counterparts (3.1% versus 0.37%, P = 0.001, OR = 8.152, 95% CI: 2.192–30.314) (Table 4).