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