Severity score

Extent score

Abnormality

Grading

Bronchopulmonary segments – for each abnormality, score by number of segments involved

Grading

Ground-glass opacities
Irregular pleural margin
Septal or subpleural lines
Honeycombing
Subpleural cyst

1
2
3
4
5

1 to 3 segments involved
4 to 9 segments involved
>9 segments involved
N.B. extent of disease measured for each of the abnormalities

1
2
3

Maximal severity score

15

Maximal extent score

15

Also used by Diot E et al. [17]; Orlandi I et al. [18]; Afeltra et al. [19]; Camiciottoli et al. [20]; Yiannopoulos et al.[21]; Bellia et al. [22]; Savarino et al. [23]; Daoussis D et al. [24].