Table 2.

Occupational origin of interstitial lung diseases (ILD) based on the multidisciplinary discussion diagnosis

Interstitial lung disease (ILD)	Count (%)	Occupational origin suggested
		Count (%)
ILD associated with autoimmune disease	50 (35.5)	10 (20.0)
Scleroderma	18 (36.0)	4 (22.2)
Rheumatoid arthritis	8 (16.0)	3 (37.5)
Mixed connective tissue disease	5 (10.0)	1 (20.0)
Dermatomyositis	9 (18.0)	1 (11.1)
Sjögren syndrome	4 (8.0)	1 (25.0)
Other autoimmune interstitial lung disease	3 (6.0)	1 (33.3)
ANCA (anti-neutrophilic cytoplasmic autoantibody) vasculitis	7 (14.0)	0 (0.0)
Granulomatosis with polyangiitis	4
Eosinophilic granulomatosis with polyangiitis	2
Unspecified ANCA vasculitis	1
Idiopathic pulmonary fibrosis (IPF)*	31 (22.0)	14 (45.2)
Uncertain IPF or asbestosis	2
Fibrosis, unclassifiable	18 (12.8)	7 (38.9)
Pleuro-parenchymal fibroelastosis	11 (7.8)
Idiopathic	7	0 (0.0)
Secondary	4	1 (25.0)
Combined Pulmonary fibrosis and emphysema	11 (7.8)	4 (36.4)
Fibrotic hypersensitivity pneumonitis	9 (6.4)	1 (11.1)
Idiopathic non-specific interstitial pneumonia (NSIP)	5 (3.6)	1 (20.0)
Cryptogenic organizing pneumonia (COP)	5 (3.6)	0 (0.0)
Secondary OP and infectious episodes	1
Asbestosis**	3 (2.1)	3 (100.0)
Uncertain IPF or asbestosis	2
Pulmonary alveolar proteinosis	3 (2.1)	2 (66.7)
Silicosis	1 (0.7)	1 (100.0)
Drug-induced ILD	1 (0.7)
Pulmonary Langerhans cell histiocytosis	1 (0.7)	1 (100.0)
Giant cell ILD	1 (0.7)
Borderline idiopathic hypereosinophilic syndrome and eosinophilic granulomatosis with polyangiitis	1 (0.7)
Smoking-related ILD	3 (2.1)
Smoking-related interstitial fibrosis	2
Unspecified smoking-related interstitial fibrosis	1

For some patients, several diagnoses were retained

Statistically significant association: *p = 0.0256; **p = 0.0233