Table 2.

Median (interquartile range – IQR) arsenic concentrations (µg/L) and percent arsenic metabolites during pregnancy by HEV seroconversion status.

	HEV seroconverter	p^a	Non- seroconverter	p^a	p^b
Arsenobetaine (µg/L)
1st TM	1.2 (0.8, 1.8)		1.5 (1.0, 2.5)		0.26
3rd TM	0.6 (0.4, 1.1)	0.01	0.7 (0.5, 1.1)	< 0.001	0.82
∑As (µg/L)
1st TM	65.6 (40.8, 132.8)		61.6 (37.0, 82.2)		1.00
3rd TM	64.7 (26.2, 105.9)	1.00	35.9 (25.6, 77.4)	0.002	0.03
% DMA
1st TM	76.7 (74.3, 80.5)		80.3 (75.6, 82.9)		0.003
3rd TM	84.3 (80.4, 87.3)	< 0.001	84.8 (78.6, 88.1)	0.003	0.50
% MMA
1st TM	7.6 (5.8, 9.6)		6.7 (4.7, 8.7)		0.50
3rd TM	4.8 (4.1, 7.0)	0.01	5.0 (3.7, 6.3)	0.03	0.82
% As(V) + As(III)
1st TM	14.7 (12, 18)		13.1 (11, 17)		0.12
3rd TM	10.2 (7.9, 13)	0.001	9.9 (7.4, 13)	0.07	0.37
Total As (µg/L)
1st TM	75.8 (41.3, 136.0)		63.6 (44.6, 85.9)		0.50
3rd TM	66.4 (27.9, 119.2)	0.82	37.7 (27.4, 79.5)	0.007	0.03

Note. TM = trimester. PP = postpartum. ∑As = inorganic arsenic plus methylated species. As = arsenic. DMA = dimethylarsinic acid. MMA = methylarsonic acid.

p derived from Fisher's exact test of the equality of medians comparing 1st and 3rd TM.

p derived from Fisher's exact test of the equality of medians comparing HEV seroconverters to non-seroconverters.