Table 1.

Distribution of selected variables by sex.

Variables	Men ($n=58$)	Women ($n=54$)	p-Valuea
Age (y)	$34.4\pm 5.7$	$34.9\pm 5.5$	0.63
Body mass index (${\mathrm{kg}/\mathrm{m}}^2$)	$19.9\pm 2.6$	$21.1\pm 4.0$	0.07
Education (y)	$4.8\pm 4.0$	$2.7\pm 3.4$	0.003
Systolic blood pressure  (mmHg)	$117.6\pm 13.1$	$115.9\pm 15.7$	0.52
Diastolic blood pressure  (mmHg)	$74.6\pm 10.0$	$77.3\pm 11.1$	0.18
Baseline total water arsenic  ($\mathrm{\mu }\mathrm{g}/\mathrm{L}$)	$47.2\pm 51.7$	$44.8\pm 51.4$	0.81
Baseline total urinary arsenic  ($\mathrm{\mu }\mathrm{g}/\mathrm{g}$ creatinine)	$194.3\pm 170.1$	$206.7\pm 178.2$	0.71
Follow-up total urinary  arsenic ($\mathrm{\mu }\mathrm{g}/\mathrm{g}$ creatinine)	$171.3\pm 131.2$	$199.6\pm 162.0$	0.31
Cohort [n (%)]
Original	25 (43.1)	25 (46.3)	0.74
Expansion	33 (56.9)	29 (53.7)

^ap-Values were computed with the chi-square test or analysis of variance.