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 7

The comparison between the subgroups of younger and older workers based on the median of age (37 years). 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).

	Younger workers		Older workers		value
	Mean	SD	Mean	SD
Age (years)	29.47	5.25	53.67	6.39	<0.001
Percentage of smokers (%)	0.74	0.45	0.61	0.50	0.428
BMI (kg/m^2)	24.92	3.70	26.63	3.62	0.164
B-Pb-1 (μg/dl)	8.61	7.18	12.97	7.53	0.080
B-Pb-2 (μg/dl)	48.24	15.08	49.71	13.21	0.756
B-Pb-D (μg/dl)	39.63	15.52	36.76	14.12	0.561
L-CAT-1 (U/mg P)	41.16	10.22	34.85	10.31	0.046
L-CAT-2 (U/mg P)	46.43	16.44	40.57	11.72	0.232
L-CAT-D (U/mg P)	5.27	20.38	5.72	15.77	0.942
S-MDA-1 (μmol/l)	1.98	0.43	2.29	0.68	0.104
S-MDA-2 (μmol/l)	2.04	0.49	2.73	0.78	0.003
S-MDA-D (μmol/l)	0.07	0.55	0.45	1.10	0.193
S-LPH-1 (μmol/l)	3.35	2.72	6.24	3.04	0.005
S-LPH-2 (μmol/l)	5.17	3.54	8.84	5.09	0.016
S-LPH-D (μmol/l)	1.81	3.68	2.60	5.91	0.633
S-LPS-1 (RF/ml)	1113.71	186.24	1033.95	92.30	0.119
S-LPS-2 (RF/ml)	1075.00	157.34	1213.90	162.47	0.014
S-LPS-D (RF/ml)	−38.71	226.46	179.95	187.42	0.004