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The P/A index per histological breast lesion
| Tissue type | n | P/A index |
| Normal epithelium | 32 | 1.71 (0.00-46.00) |
| Hyperplasia | 43 | 20.72 (0.74-48.67) |
| Preinvasive lesions | 42 | 14.11 (3.67-58.00) |
| Carcinoma invasive | 50 | 20.86 (3.87-301.00) |
| Total | 167 | 16.66 (0.00-301.00) |
Values are expressed as median (range).
