Table 1

Classification criteria for ILD in primary Sjögren's syndrome

Probable ILDChest radiograph or CT described as ‘fibrosis’ or ‘consistent with ILD or parenchymal lung disease’
Physician's diagnosis of ‘interstitial lung disease’, ‘pulmonary fibrosis’, ‘interstitial pneumonia’, etc
Definite ILDDiagnosis of ILD by a pulmonologist, based on chest radiograph/high resolution chest CT and pulmonary function testing (restrictive ventilatory pattern or reduced DLCO)
Lung biopsy (bronchoscopic or surgical)
  • DLCO, diffusing capacity for carbon monoxide; ILD, interstitial lung disease.