TABLE 2.

Underlying clinical diagnoses

Patients	165
Chronic fibrosing hypersensitivity pneumonitis	14 (8.5)
Idiopathic interstitial pneumonia	12 (7.3)
Unclassifiable ILD	52 (31.5)
Interstitial pneumonitis with autoimmune features	2 (1.2)
Autoimmune ILD	77 (46.7)
Rheumatoid arthritis-ILD	7 (4.2)
Systemic sclerosis-ILD	43 (26.1)
Dermatomyositis-ILD	12 (7.3)
Mixed connective tissue disease-ILD	10 (6.1)
Other autoimmune ILD#	5 (3.0)
Other ILDs¶	10 (6.1)

Data are presented as n or n (%). ILD: interstitial lung disease. ^#: Sjögren syndrome ILD (n=1), systemic lupus erythematosus (n=1), others (n=3); ^¶: exposure-related ILD (n=2), other fibrosing ILD (n=5), sarcoidosis (n=3).