Table 6. Comparison of Size and Extent of Pleural Plaques between Subjects with Pleural Plaque and Asbestosis (PPA) and Isolated Pleural Plaque (IPP).
| Pleural Plaques | Environmental Asbestos Exposure (n = 98) | Occupational Asbestos Exposure (n = 181) | ||||
|---|---|---|---|---|---|---|
| PPA (n = 52) | IPP (n = 46) | P | PPA (n = 122) | IPP (n = 59) | P | |
| Maximum width (mm) | 5.06 ± 2.7* | 5.6 ± 2.3 | 0.2256 | 5.6 ± 3.1 | 5.3 ± 2.1 | 0.795 |
| Maximum length (mm) | 73.4 ± 61.5 | 46.6 ± 30.9 | 0.0159† | 91.3 ± 60.8 | 53.5 ± 31.3 | < 0.001† |
| Total extent score | 2.8 ± 1.4 | 2.4 ± 1.0 | < 0.0001† | 3.3 ± 1.5 | 2.4 ± 1.1 | < 0.001† |
*Mean ± SD, †p < 0.05 was considered to indicate statistical significance. SD = standard deviation