Environmental Health

Table 2 Water and blood concentrations by clinic

From: Neurodevelopmental outcomes among 2- to 3-year-old children in Bangladesh with elevated blood lead and exposure to arsenic and manganese in drinking water

	Sirajdikhan						Pabna
Variable	N	% <LOD	P25	Median	P75	Maximum	N	%< LOD	P25	Median	P75	Maximum	P-value^a
Water Arsenic, μg/L
1st Trimester	238	29	LOD^b	1.3	1.9	380	286	11	5.3	26.5	81	1400	<0.0001
1 month	238	49	LOD^b	0.8	1.9	120	285	10	5.9	31	120	1400	<0.0001
12 months	92	40	LOD^b	0.8	38.2	701	99	13	4.5	30.5	125	828	<0.0001
20–40 months	239	31	LOD^b	1.5	21.6	653	286	9	4.4	25.7	130	1470	<0.0001
Water Manganese, μg/L
1st Trimester	239	13	30	540	960	3300	286	1	270	500	900	3300	0.02
1 month	238	3	39	560	890	3900	278	0	340	545	1060	3900	0.0001
12 months	92	0	217	1150	2000	4650	99	1	244	464	891	2470	0.009
20–40 months	239	1	164	948	1820	4750	286	0	299	515	969	4050	0.003
Blood Lead, μg/dL	239	6	5.5	7.6	10.4	43	286	67	LOD^b	LOD^b	3.8	13.8	<0.0001

^aWilcoxon rank sum test
^bLOD for water As = 0.5–0.75 μg/L_, LOD for water Mn = 0.5 μg/L, LOD for blood lead = 3.3 μg/dL

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ISSN: 1476-069X

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