Table 3

Multiple regression analysis of metals, arsenic, frequency of micronuclei, and SCE rate as dependent variables and exposure, age, smoking status, and fish consumption 5 days prior to the study as predictors

	Blood (μg/l)			Urine (μg/g creatinine)
	β	SE of β	t	β	SE of β	t
p<0.05, p<0.01; **p<0.001.
Cadmium	(n = 168; R² 0.39)			(n = 168; R² 0.15)
Harbour workers v controls	0.058	0.10	0.56	0.075	0.064	1.18
Age (years)	0.0002	0.005	0.04	0.011	0.003	3.75***
Current smoker (yes vs. no)	1.06	0.106	9.97***	0.202	0.065	3.10**
Fish consumption (yes vs. no)	0.131	0.105	1.25	0.080	0.065	1.23
Mercury	(n = 168; R² 0.16)			(n = 168; R² 0.08)
Harbour workers v controls	0.071	0.248	0.29	−0.088	0.11	−0.83
Age (years)	0.027	0.012	2.26*	−0.004	0.005	−0.76
Current smoker (yes v no)	−0.17	0.254	−0.66	−0.13	0.11	−1.23
Fish consumption (yes v no)	1.062	0.251	4.23***	0.025	0.11	0.23
Amalgam fillings (>0 v 0)	0.16	0.28	0.58	0.366	0.12	3.04**
Lead	(n = 168; R² 0.08)
Harbour workers v controls	−8.03	3.64	−2.21*
Age (years)	0.34	0.17	1.95
Current smoker (yes v no)	7.86	3.73	2.11*
Fish consumption (yes v no)	2.47	3.69	0.67
Nickel				(n = 168; R² 0.05)
Harbour workers v controls				−0.39	0.17	−2.30*
Age (years)				0.013	0.008	1.67
Current smoker (yes v no)				−0.090	0.17	−0.52
Fish consumption (yes v no)				−0.014	0.17	−0.08
Arsenic				(n = 168; R² 0.11)
Harbour workers v controls				0.24	1.99	0.12
Age (years)				0.27	0.09	2.83**
Current smoker (yes v no)				2.45	2.04	1.20
Fish consumption (yes v no)				5.32	2.02	2.64**