Table S3. The causes of death of the six patients of with ILD.

Causes of death	Cases	Proportion (%)	Type of ILD
Acute exacerbation	3	50	2 cases of IPF, 1 cases of PM-ILD
Respiratory failure	1	16.7	1 cases of IIP (possible IPF)
Infections	1	16.7	1 cases of IIP (possible IPF)
Heart failure	1	16.7	1 cases of PM-ILD

The causes of death were acute exacerbation in 3 (50%) patients, respiratory failure in 1 (16.7%), pulmonary infection in 1 (16.7%) and heart failure in 1 (16.7%). ILD, interstitial lung disease; IIP, idiopathic interstitial pneumonia; IPF, idiopathic pulmonary fibrosis; PM, polymyositis.