| UIP pattern (all four features) | Possible UIP pattern (all three features) | Inconsistent with UIP pattern (any one of seven features) |
| Subpleural basal predominance | Subpleural basal predominance | Upper or mid-lung predominance |
| Peribronchovascular predominance | ||
| Reticular abnormality | Reticular abnormality | Extensive ground-glass abnormality (extent greater than reticular abnormality) |
| Profuse micronodules (bilateral, predominantly upper lobes) | ||
| Honeycombing with or without traction bronchiectasis | Discrete cysts (multiple bilateral, away from areas of honeycombing) | |
| Diffuse mosaic attenuation/air trapping (bilateral in three or more lobes) | ||
| Absence of features listed as inconsistent with UIP pattern | Absence of features listed as inconsistent with UIP pattern | Consolidation in bronchopulmonary segment(s)/lobe(s) |
UIP: usual interstitial pneumonia. Reproduced and modified from [11] with permission from the publisher.