pSS	Primary Sjögren’s syndrome
ILD	Interstitial lung disease
KL-6	Krebs von den Lungen-6
CEA	Carcinoembryonic antigen
CA153	Carbohydrate antigen 153
FVC	Forced vital capacity
FEV1	Forced expiratory volume in 1 s
TLC	Total lung capacity
DLCO	Diffusing capacity for carbon monoxide
CTD-ILD	Connective tissue disease-related interstitial lung diseases
HRCT	High-resolution CT
IPF	Idiopathic pulmonary fibrosis
IQR	Interquartile range
ROC	Receiver operating characteristic
IgG	Immunoglobulin G