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肺组织病变情况例数统计
The statistics of the pathological changes of lung tissues
| Group | Mild dysplasia | Moderate dysplasia | Severe dysplasia | Carcinoma in situ | Ther rate of canceration |
| Blank control group | 0 | 0 | 0 | 0 | 0 |
| Solvent control group | 0 | 0 | 0 | 0 | 0 |
| Dust treatment group (total) | 3 | 6 | 10 | 4 | 13.33% |
| Concentration 1 | 1 | 1 | 0 | 0 | 0 |
| Concentration 2 | 0 | 1 | 3 | 1 | 6.67% |
| Concentration 3 | 1 | 2 | 2 | 1 | 6.67% |
| Concentration 4 | 1 | 2 | 5 | 2 | 13.33% |
