Chest radiograph results according to International Labour Office(ILO) classification in 145 subjects# with previous experience in sandblasting
| Subjects | Total exposure duration months | Latency period¶ months | |
| Profusion of small opacities | |||
| Category 0 | 68 (46.9) | 32±27 | 73±34 |
| 0/- | 52 | ||
| 0/0 | 3 | ||
| 0/1 | 13 | ||
| Category 1 | 35 (24.1) | 42±23 | 98±33 |
| 1/0 | 19 | ||
| 1/1 | 9 | ||
| 1/2 | 7 | ||
| Category 2 | 16 (11.0) | 45±30 | 92±36 |
| 2/1 | 4 | ||
| 2/2 | 2 | ||
| 2/3 | 10 | ||
| Category 3 | 26 (17.9) | 38±19 | 66±28 |
| 3/2 | 8 | ||
| 3/3 | 6 | ||
| 3/+ | 12 | ||
| Large opacities | 14 (9.6) | ||
| Type A | 6 | ||
| Type B | 3 | ||
| Type C | 5 |
Data are presented as n (%), n or mean±sd. #: evaluated according to ILO classification (two chest radiographs were unavailable and 10 chest radiographs were of poor quality); ¶: time elapsed since the beginning of exposure.