Table 1 Baseline characteristics at the time of blood collection of the discovery cohort

No. of subjects

30

30

28

15

6

86

57

Age (years)

62 (55–73)

67 (48–76)

77 (73–80)

71 (63–78)

68 (59–69)

75 (70–79)

73 (65–76)

Sex (male)

10 (33%)

8 (27%)

24 (86%)

1 (7%)

3 (50%)

66 (77%)

29 (51%)

Smoking history (yes)

1 (3%)

5 (17%)

27 (96%)

0 (0%)

2 (33%)

62 (72%)

30 (53%)

Corticosteroid (yes)

0 (0%)

5 (17%)

0 (0%)

1 (7%)

0 (%)

12 (14%)

22 (39%)

Immunosuppressive agents (yes)

0 (0%)

0 (0%)

1 (4%)

2 (13%)

2 (33%)

3 (3%)

11 (19%)

Antifibrotic therapy (yes)

0 (0%)

0 (0%)

0 (0%)

0 (0%)

0 (0%)

18 (21%)

1 (2%)

Serum biomarker

Classification of ILD

 INSIP^§§

N/A

N/A

N/A

N/A

N/A

N/A

14 (25%)

 CTD-ILD^llll

N/A

N/A

N/A

N/A

N/A

N/A

24 (42%)

 Unclassifiable ILD

N/A

N/A

N/A

N/A

N/A

N/A

15 (26%)

 FHP^***

N/A

N/A

N/A

N/A

N/A

N/A

1 (2%)

 PPFE^†††

N/A

N/A

N/A

N/A

N/A

N/A

3 (5%)