The Effect of a Short-Term Exposure to Lead on the Levels of Essential Metal Ions, Selected Proteins Related to Them, and Oxidative Stress Parameters in Humans

Table 5

The comparison between subgroups of workers without a history of occupational exposure to lead (N-HOE) and workers witch such a history (HOE). B: whole blood; S: serum; L: leukocyte; D: a difference between the levels at baseline (1) and at the end of the study period (2).

	N-HOE		HOE		value
	Mean	SD	Mean	SD
Age (years)	37.72	14.17	44.58	12.37	0.125
Percentage of smokers (%)	0.72	0.46	0.63	0.50	0.569
BMI (kg/m^2)	25.35	3.81	26.13	3.68	0.530
B-Pb-1 (μg/dl)	4.16	1.62	16.95	5.32	<0.001
B-Pb-2 (μg/dl)	46.52	10.98	51.26	16.37	0.311
B-Pb-D (μg/dl)	42.36	11.04	34.33	16.89	0.028
Se-1 (μg/dl)	68.64	9.25	71.23	9.93	0.424
Se-2 (μg/dl)	78.45	9.70	70.73	8.56	0.016
Se-D (μg/dl)	9.81	14.25	−0.51	12.85	0.029
L-SOD-1 (NU/mg P)	17.34	1.88	16.25	1.89	0.091
L-SOD-2 (NU/mg P)	16.00	4.56	17.79	3.15	0.180
L-SOD-D (NU/mg P)	−1.35	4.03	1.53	3.98	0.038
L-CAT-1 (U/mg P)	39.13	11.08	37.24	10.35	0.600
L-CAT-2 (U/mg P)	38.46	8.84	48.87	17.26	0.029
L-CAT-D (U/mg P)	−0.67	9.89	11.63	22.27	0.039
S-LPH-1 (μmol/l)	3.52	2.12	5.91	3.66	0.022
S-LPH-2 (μmol/l)	6.53	4.76	7.27	4.67	0.644
S-LPH-D (μmol/l)	3.01	3.96	1.36	5.52	0.309