Table 2: Spearman's correlations between age, working hours, urinary metals, and blood metals and 8-OHdG, FECa and GFR
Variable	8-OHdG (μg/g Cr)			FECa%			GFR (mL/min/1.73 m2)
	n	ρ		n	ρ		n	ρ
Men
Age (yrs)	52	0.14		43	0.21		46	-0.35*
Work Hours/Week	49	0.21		42	0.06		44	-0.20
CdU (µg/g Cr)	53	-0.19		44	0.13		45	0.11
PbU (µg/g Cr)	53	0.24		44	-0.06		45	-0.05
MnU (µg/g Cr)	53	0.27*		44	-0.08		45	-0.15
CdB (µg/L)	47	0.16		44	-0.13		46	0.09
PbB (µg/dL)	47	-0.006		44	0.23		46	-0.16
MnB (µg/L)	47	0.20		44	0.40**		46	0.09
Women
Age (yrs)	52	0.06		47	0.12		48	-0.38**
Work Hours/Week	51	-0.09		46	-0.10		47	0.30*
CdU (µg/g Cr)	52	-0.18		47	-0.07		48	-0.08
PbU (µg/g Cr)	52	0.18		47	-0.12		47	0.42**
MnU (µg/g Cr)	52	0.24		47	0.29		47	0.08
CdB (µg/L)	47	0.08		47	0.33*		48	-0.21
PbB (µg/dL)	47	0.03		47	-0.07		48	0.27
MnB (µg/L)	47	-0.08		47	-0.29		48	-0.06
*p<0.05, **p<0.01; The subscripts ‘U’ and ‘B,’ respectively, represent the urinary and blood concentrations of the metals measured.