Frequencies of patients and lung zones with computed tomographic (CT) findings of lung cysts in primary Sjögren’s syndrome. Lung cysts were observed in 75 lung zones of 22 patients in 336 lung zones of 56 patients with primary Sjögren’s syndrome. p values were calculated by comparing differences between the number of patients or lung zones with each CT finding with lung cysts and those with no lung cysts using Fisher’s exact probability test.
| Patients | Lung Zones | |||||
|---|---|---|---|---|---|---|
| Cysts+, n = 22 N (%) | Cysts−, n = 34 N (%) | p | Cysts+, n = 75 N (%) | Cysts−, n = 261 N (%) | p | |
| Airspace consolidation | 4 (18) | 4 (12) | 0.698 | 7 (9) | 6 (2) | 0.011 |
| Bronchiectasis | 5 (23) | 7 (21) | 1.000 | 11 (15) | 12 (5) | 0.007 |
| Emphysema | 2 (9) | 0 (0) | 0.150 | 6 (8) | 2 (1) | 0.002 |
| Ground-glass opacities | 7 (32) | 13 (38) | 0.777 | 15 (20) | 35 (13) | 0.196 |
| Honeycombing | 3 (14) | 1 (3) | 0.289 | 8 (11) | 9 (3) | 0.030 |
| Ill-defined centrilobular nodule | 10 (45) | 10 (29) | 0.262 | 21 (28) | 50 (19) | 0.109 |
| Interlobular septal thickening | 17 (77) | 21 (62) | 0.257 | 49 (65) | 107 (41) | 0.000 |
| Intralobular reticular opacities | 9 (41) | 11 (32) | 0.575 | 22 (29) | 40 (15) | 0.010 |
| Mosaic perfusion | 6 (27) | 6 (18) | 0.508 | 11 (15) | 29 (11) | 0.420 |
| Nonseptal linear or plate-like opacities | 5 (23) | 5 (15) | 0.491 | 8 (11) | 17 (7) | 0.221 |
| Pleural thickening | 8 (36) | 12 (35) | 1.000 | 18 (24) | 42 (16) | 0.125 |
| Thickening of BVB | 8 (36) | 8 (24) | 0.369 | 19 (25) | 32 (12) | 0.010 |
| Traction bronchiectasis | 4 (18) | 3 (9) | 0.415 | 8 (11) | 16 (6) | 0.203 |
Data in bold type indicate significant differences between groups. BVB: bronchovascular bundles; N: number of patients or lung zones with each thin-section finding.