Regarding hematological index, the table 3.11 showed that the Hb mean in the group of < 10 µg / dl BLLs was 123.5 ± 10.42 g / l, which was higher than the group of ≥ 10 µg / dl BLLs with 120, 5 g / l and p = 0, 009 (p <0, 05).