Table 4 Computed tomography findings in patients with cryptogenic and secondary organizing pneumonia, including 12 patients with focal organizing pneumonia
|  | COP (n = 16) | SOP (n = 69) | Total OP (n = 85) | P |
|---|---|---|---|---|
Number of involved lobes | Â | Â | Â | 0.185 |
 1 | 7 (43.8) | 19 (27.5) | 26 (30.6) |  |
 2 | 1 (6.3) | 16 (23.2) | 17 (20.0) |  |
 3 | 5 (31.3) | 9 (13.0) | 14 (16.5) |  |
 4 | 3 (18.8) | 10 (14.5) | 13 (15.3) |  |
 5 | 0 | 15 (21.7) | 15(17.6) |  |
Characters | Â | Â | Â | Â |
 Consolidation | 5 (31.3) | 29 (42.0) | 34 (40.0) | 0.428 |
 Effusion | 2 (12.5) | 27 (39.1) | 29 (34.1) | 0.036* |
 Both of consolidation and ground glass opacity | 4 (25.0) | 23 (33.3) | 27 (31.8) | 0.766 |
 Nodule or mass | 6 (37.5) | 12 (17.4) | 18 (21.2) | 0.076 |
 Parenchymal bands or fibrotic pattern | 7 (43.8) | 9 (13.0) | 16 (18.8) | 0.005* |
 Focal solitary nodule | 7 (43.8) | 5 (7.2) | 12 (14.1) |  < 0.001* |
 Cavity | 0 | 10 (14.5) | 10 (11.8) | 0.196 |
 Mediastinal lymphadenopathy | 1 (6.3) | 8 (11.6) | 9 (10.6) | 0.531 |
 Perilobular opacity | 4 (25.0) | 3 (4.3) | 7 (8.2) | 0.022* |
 Ground glass opacity | 1 (6.3) | 5 (7.2) | 6 (7.1) | 0.685 |
 Reverse halo sign | 1 (6.3) | 0 | 1 (1.2) | 0.188 |