The relation between amyotrophic lateral sclerosis and inorganic selenium in drinking water: a population-based case-control study

Table 2 Estimated daily intake (μg/day) of trace elements through drinking water and through diet in study population

Element	Centile of estimated intake through tapwater^a			Estimated intake through diet
	5^th	50^th	95^th
Al	0.0	0.0	7.8	3580
As	0.0	0.0	1.0	62
Cr	0.3	5.5	5.5	104.5^b
Cd	0.0	0.0	0.0	13.6
Cu	2.9	10.7	13.5	1140
Fe	39.5	39.5	759.2	11000
Li	20.3	20.3	92.0	29.9
Mn	4.2	4.2	190.6	1380
Pb	0.2	4.2	4.2	55.2
Se^c	0.0	0.0	20.8	0
Zn	54.1	54.1	3861.0	12000

^aExpressed as 5th, 50th and 95th percentiles, assuming a consumption of wellwater or municipal tapwater of 2.6 l/day
^bAverage of median values in males and females
^cInorganic Se only