Computed tomographic (CT) features of organising pneumonia
| Cases, n (%) | Age years | Male/female, n (%) | |
| Extent of parenchymal involvement on CT images | |||
| Single lobe | 74 (47) | 61 (53–70) | 47 (30)/27 (17) |
| Multiple lobes | 82 (53) | 63 (57–74) | 43 (28)/39 (25) |
| Ipsilateral | 9 (6) | 75 (53–81) | 6 (4)/3 (2) |
| Bilateral | 73 (47) | 62 (57–70) | 37 (24)/36 (23) |
| CT imaging patterns | |||
| Single-pattern | 100 (64) | 61 (53–69) | 58 (37)/42 (27) |
| Nodular | 42 (27) | 63 (54–70) | 21 (13)/21 (13) |
| Alveolar consolidation | 32 (21) | 61 (53–69) | 20 (13)/12 (8) |
| Mass-like | 18 (11) | 56 (51–67) | 13 (8)/5 (3) |
| GGO | 8 (5) | 61 (47–67) | 4 (3)/4 (3) |
| Mixed-pattern | 56 (36) | 65 (57–76) | 32 (20)/24 (16) |
| Alveolar consolidation+GGO | 13 (7) | 69 (58–79) | 10 (6)/3 (2) |
| Alveolar consolidation+bronchocentric | 6 (4) | 64 (41–73) | 3 (2)/3 (2) |
| Alveolar consolidation+nodular | 4 (3) | 65 (51–75) | 2 (1)/2 (1) |
| GGO+bronchocentric | 7 (4) | 58 (56–75) | 3 (2)/4 (3) |
| GGO+reticulo-infiltrative | 3 (2) | 66 (41–70) | 1 (1)/2 (1) |
| GGO+nodular | 2 (1) | 61 (58–63) | 0 (0)/2 (1) |
| GGO+crazy paving | 2 (1) | 79 (74–84) | 2 (1)/0 (0) |
| Mass+nodular | 3 (2) | 65 (62–71) | 2 (1)/1 (1) |
| Mass+reverse halo | 1 (1) | 45 (NA) | 1 (1)/0 (0) |
| Alveolar consolidation+GGO+bronchocentric | 6 (4) | 68 (53–81) | 3 (2)/3 (2) |
| Alveolar consolidation+GGO+reverse halo | 3 (2) | 57 (54–60) | 2 (1)/1 (1) |
| Alveolar consolidation+GGO+reticulo-infiltrative | 1 (1) | 69 (NA) | 0 (0)/1 (1) |
| Alveolar consolidation+GGO+crazy paving | 1 (1) | 58 (NA) | 0 (0)/1 (1) |
| Alveolar consolidation+GGO+nodular | 1 (1) | 87 (NA) | 1 (1)/0 (0) |
| GGO+reverse halo+reticulo-infiltrative | 1 (1) | 61 (NA) | 0 (0)/1 (1) |
| Alveolar consolidation+GGO+bronchocentric+crazy paving | 2 (1) | 62 (58–66) | 2 (1)/0 (0) |
| Combined extent and patterns on CT images | |||
| Single-lobe and single-pattern | 71 (46) | 61 (53–70) | 46 (29)/25 (16) |
| Multilobe and single-pattern | 29 (18) | 61 (52–66) | 12 (8)/17 (11) |
| Single-lobe and mixed-pattern | 3 (2) | 57 (50–64) | 1 (1)/2 (1) |
| Multilobe and mixed-pattern | 53 (34) | 65 (57–76) | 31 (20)/22 (14) |
Values are presented as counts (% of total 156 patients) or medians (interquartile range or range, as appropriate). Examples of the various radiographic features are presented in figure 2 and supplementary figure S1a–q. GGO: ground-glass opacity; NA: not available.