Table 1. Characteristics of the control subjects and workers exposed to benzene.
| Benzene exposure time (year) | ||||
|---|---|---|---|---|
| Control | 1 - < 7 | 7 - < 12 | 12 - < 24 | |
| Male | 9 | 3 | 9 | 2 |
| Female | 8 | 13 | 3 | 3 |
| Age | 34.7 ± 6.01 | 39.4 ± 5.6 | 35.5 ± 5.6 | 40.2 ± 4.3 |
| Hemoglobin (g/dl) | 14.6 ± 1.9 | 13.3 ± 1.6 | 15.1 ± 1.5 | 14.9 ± 2.5 |
| Red blood cells (RBCs, ×106/ml) | 5.3 ± 1.3 | 4.4 ± 0.4 | 4.9 ± 0.4 | 5.61 ± 1.1 |
| White blood cells (WBCs, ×1000/ml) | 4.9 ± 0.5 | 6.3 ± 1.8 | 6.4 ± 1.5 | 4.74 ± 0.6 |
| Platelets (×1000/ml) | 253.8 ± 48.3 | 250.3 ± 38.2 | 226.7 ± 31.8 | 244.2 ± 46.3 |
| Alanine aminotransferase (ALT, U/L) | 24.94 ± 9.4 | 19.0 ± 12.6 | 23.4 ± 10.7 | 21.6 ± 15.2 |
Values are mean ± SD.
Normal range of blood tests: Hemoglobin (g/dl): 13.5–16.5 (male), 12.0–15.0 (female). RBCs (×106/ml): 4.5–5.5 (male), 4.0–4.9 (female). WBCs (ml): 4,500–10,000. Platelets (ml): 100,000–450,000. ALT (U/L): 10–40 (male), 7–35 (female).