Table 1. Main characteristics of the 83 study patients at ICU admission.

	Median [IQR] or N (%)
Demographics
Age in years	61.7 [48.4–74.5]
Male	56 (67.5%)
Current smoker	64 (77%)
Known cardiovascular disease	43 (51.8%)
Poor chronic health status (Performance status ≥2)	31 (32.4%)
Exposure to pneumotoxic drugs	30 (36.1%)
Clinical presentation
Days from respiratory symptom onset to ICU admission	11 [5]–[28]
Crackles at chest auscultation	76 (91.6%)
Shock	42 (50.6%)
Acute kidney injury	42 (50.6%)
Significant proteinuria	33 (45.2%)
Skin rash	25 (30.1%)
Arthralgia	11 (13.3%)
ILD subgroups
Toxic	22 (26.5%)
Drug-induced ILD/Pneumoconiosis	14/3
Radiation pneumonitis/Hypersensitivity pneumonitis	2/3
Connective tissue diseases	28 (33.7%)
Rheumatoid arthritis	5/28
Scleroderma	6/28
Polymyositis/dermatomyositis	2/28
Primary Sjogren’s syndrome	3/28
Mixed connective tissue disease	5/28
Antisynthetase syndrome	2/28
Systemic lupus erythematosus/antiphospholipid syndrome	2/28
Miscellaneous	3/28
Idiopathic interstitial pneumonia (acute ILD)	19 (22.8%)
Cryptogenic organising pneumonia	7
Acute interstitial pneumonia	8
Lymphocytic interstitial pneumonia	2
Idiopathic acute eosinophilic pneumonia	2
Acute exacerbation of chronic idiopathic ILD	17 (20.5%)
Idiopathic pulmonary fibrosis (IPF)	9
Chronic idiopathic interstitial lung disease (other than IPF)	8
Langerhans cell histiocytosis	2 (2.4%)

Abbreviations: RV, right ventricular; ILD, interstitial lung disease.