Table 1 Baseline characteristics of the IPF patients (n = 67)

Age (year)^*

62.8 ± 12.44

FVC^*

75.3 ± 4.37

FEV₁^*

70.9 ± 4.30

DL_CO^*

70.5 ± 3.96

Sex⁺

 Male

40 (59.7)

 Female

27 (40.3)

Disease status⁺

 Acute exacerbation

55 (82.1)

 (AE-IPF) stable

12 (17.9)

Immunosuppression drugs⁺

 Pred 5 mg

2 (3)

 Pred 10 mg

5 (7.5)

 Pred 20 mg

2 (3)

 CyA 125 mg

2 (3)

 Unknown

8 (11.9)

Surgical lung biopsy⁺

 No

63 (94)

 Yes

4 (6)

History of fibrosis in family⁺

 No

55 (82.1)

 Yes

12 (17.9)

Bacterial infection No. 7 (10.4%)

 P. aeruginosa⁺

17 (27)

 S. pneumonia⁺

17 (27)

 S. aureus⁺

16 (25.4)

 K. pneumoniae⁺

16 (25.4)

 H. influenzae⁺

29 (46)

Viral infection No. 12 (17.9%)

 Parainfluenza⁺

12 (19)

 Influenza⁺

12 (19)

 Adeno⁺

10 (15.9)

 Rhinovirus⁺

25 (39.7)

 RSV⁺

15 (23.8)

 Coronavirus⁺

9 (14.3)

Co-infection⁺ No. 40 (59.7%)

 Death⁺

  No

49 (73.1)

  Yes

18 (26.9)