Table 3.

Bivariate linear regression analyses between log TGF alpha levels with urinary iAs metabolites and other potential confounding variables (n=72)

Independent variable	β	95% CI	r	P
Water TAs	0.00004	-0.001-0.001	0.01	0.93
iAsIII+V	0.005	0.0016-0.009	0.32	0.006
MAsIII+V	0.008	0.0013-0.015	0.27	0.021
DMAsIII+V	0.001	0.0002-0.0016	0.31	0.009
TAs	0.0007	0.0002-0.0013	0.33	0.001
iAsV	0.015	0.002-0.027	0.28	0.016
iAsIII	0.006	0.001-0.011	0.29	0.013
MAsV	0.042	0.015-0.069	0.32	0.003
MAsIII	0.007	-0.001-0.015	0.21	0.073
DMAsV	0.001	0.0005-0.003	0.31	0.008
DMAsIII	0.001	0.0001-0.0025	0.25	0.034
ΣAs speciesIII	0.001	0.0001-0.0018	0.26	0.027
ΣAs speciesv	0.001	0.0005-0.0028	0.31	0.006
Age	0.001	-0.011-0.013	0.02	0.87
TWEa	0.001	-0.0004-0.002	0.15	0.20
Leukocytesb	0.11	-0.12-0.35	0.11	0.35
Skin lesionc	0.33	0.11-0.55	0.33	0.004
Melanosisd	0.40	0.18-0.62	0.39	0.001
Keratosise	0.32	0.09-0.55	0.32	0.007

Abbreviations: β, regression coefficient; 95% CI, 95% confidence interval; r, correlation coefficient.

^aTWE, time-weighted exposure.

^bLeukocytes in urine, yes=1.

^cLesion, yes=1.

^dMelanosis, yes=1

^eKeratosis, yes=1.