Table 2 Occupational origin of interstitial lung diseases (ILD) based on the multidisciplinary discussion diagnosis

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