Table 2 Distribution of IRD in the ILD group and non-ILD group

Connective tissue disease

35 (55.6%)

55 (87.3%)

 Systemic lupus erythematosus

4

15

 Systemic sclerosis

16

19

 Sjögren’s syndrome

9

17

 Sharp syndrome

6

4

Small vessel vasculitis

16 (25.4%)

3 (4.8%)

 Granulomatosis with polyangiitis

7

1

 Microscopic polyangiitis

3

1

 Eosinophilic granulomatosis with polyangiitis

6

1

Myositis

12 (19.0%)

5 (7.9%)

 Myositis/polymyositis

0

1

 Dermatomyositis

4

2

 Jo1-anti-synthetase syndrome

8

1

 Necrotizing myositis

0

1

Total

63 (100.0%)

63 (100.0%)