Frequency of pleural disease among pleural and peritoneal cases and non-cases
| Pleural | Peritoneal | Non-cases | Total | p value* | |
|---|---|---|---|---|---|
| n (%) | n (%) | n (%) | n (%) | ||
| *All cases v non-cases. | |||||
| Benign pleural disease (all) | 17 (30) | 10 (50) | 332 (17) | 359 (18) | <0.001 |
| Blunt/obliterated costophrenic angle | 4 (7) | 4 (20) | 98 (5) | 106 (5) | 0.040 |
| Diffuse pleural thickening | 12 (21) | 9 (45) | 225 (12) | 246 (12) | <0.001 |
| Calcified plaques | 3 (5) | 2 (10) | 94 (5) | 99 (5) | 0.513 |
| Thickening of interlobar fissure | 4 (7) | 2 (10) | 45 (2) | 49 (2) | 0.046 |
| Asbestosis | 8 (14) | 10 (50) | 223 (12) | 241 (12) | 0.002 |