Figure 1
Comparison of survival curves (A) and serum heme oxygenase (HO)-1 (B) between acute exacerbation of idiopathic pulmonary fibrosis (IPF) vs. of non-IPF. (A) Comparison of the curves by log-rank test between acute exacerbation of IPF and non-IPF patients. (B) The median serum HO-1 levels for acute exacerbation of IPF, idiopathic interstitial pneumonias other than IPF and connective tissue disease-associated interstitial lung disease, and chronic hypersensitivity pneumonia were 47.6 [23.4–74.0], 25.7 [18.9–41.2], 27.9 [19.1–47.3], and 15.2 [2.2–28.2] ng/mL, respectively. The center bold line is the median value; the bottom and top of the boxes represent the 25th to 75th percentiles, respectively; and the whiskers are 95% confident intervals. *P < 0.05, **P < 0.01.
