Biological Monitoring of Hexavalent Chromium and Serum Levels of the Senescence Biomarker Apolipoprotein J/Clusterin in Welders

Table 2

Chromium blood and urine levels of welders entered worksite intervention (n = 9).

Welder	Age	Smoking status^1	Cr blood (𝜇g/L)		Cr urine (g/g creatinine)		Cr urine (𝜇g/L)
			Intervention		Intervention		Intervention
			pre	post	pre	post	pre	post
1st	58	N	6.1	4.0	27.27	24.27	50.20	5.20
2nd	46	H	2.0	1.2	0.72	4.04	0.80	3.90
3rd	38	N	5.0	0.6	0.64	0.95	1.50	0.50
4th	40	M	2.9	0.3	1.03	0.43	1.10	0.20
5th	36	M	3.7	0.2	0.31	0.09	0.90	0.10
6th	37	L	2.5	2.7	0.65	2.40	1.20	1.60
7th	42	M	2.1	1.9	1.13	1.83	1.20	2.20
8th	35	L	3.0	1.6	1.94	2.64	3.10	3.20
9th	35	M	2.7	1.2	0.20	4.98	0.30	3.20
All mean	40.78		3.33	1.52^2	3.77	4.62	6.70	2.23
(SD)	(7.40)		(1.38)	(1.22)	(8.83)	(7.54)	(16.33)	(1.79)

¹N: nonsmokers; L: light (1–15 pack years); M: medium (16–30 pack years); H: heavy (𝜇 pack years)
²>30, Wilcoxon signed ranks test.