Estimated change of Forced Vital Capacity (FVC) percent predicted per year for patients with Idiopathic Pulmonary Fibrosis (IPF), Interstitial Pneumonia with Autoimmune Features (IPAF), and Connective Tissue Disease-associated Interstitial Lung Disease (CTD-ILD) stratified by an age-adjusted blood leukocyte telomere length less than or greater than 10th percentile (A), by the presence of the MUC5B rs35705950 minor allele (GT/TT) (B), and by the presence of TOLLIP rs5743890 minor allele (AG/GG) (C). This analysis was limited to the subset of patients for which there were at least 3 spirometry measurements spanning over at least 90 days. Significant with Bonferroni correction for multiple testing with three predictors (LTL, MUC5B, TOLLIP) per diagnosis; alpha level of 0.017 per test (0.05/3)