Table 2 Features on HRCT that will be assessed in the ANCHOR-RA study

Features related to ILD

Presence or absence of ILD (adjudicated)

Presence or absence of:

 ground glass opacities

 traction bronchiectasis

 reticulations

 honeycombing

CT pattern:

 usual interstitial pneumonia (UIP)

 non-specific interstitial pneumonia (NSIP) (cellular/fibrotic subtypes)

 lymphocytic interstitial pneumonia

 organising pneumonia (OP)

 diffuse alveolar damage

 respiratory bronchiolitis

 desquamative interstitial pneumonia, indeterminate

Distribution of ILD: upper, middle or lower lung regions, or diffuse

Predominance of ILD: upper, middle or lower lung regions, or diffuse

Total extent of fibrosis to nearest 10%

Total extent of ILD to nearest 10%

Features related to bronchiectasis

Presence or absence of free-standing bronchiectasis (adjudicated)

Lobes involved

Presence or absence of:

 mucus plugging

 bronchial wall thickening

Features related to emphysema

Presence or absence of emphysema (adjudicated)

Distribution of emphysema: upper, middle or lower lung regions, or diffuse

Extent of emphysema to nearest 10%