Table 2. Level of toxic metals in first-morning urine.

Note that for some metals (aluminum, mercury, antimony) results were often below the detection limit, so results for those metals must be interpreted cautiously.

Metal	% below detection limit (Autism/controls)	ASD Average (25th %/75th %) mcg/g-creatinine	Neurotypical Average (25th %/75th %) mcg/g-creatinine	% difference	p-value (from t-test)
Aluminum	31%/46%	9.03 (3.3/11.6)	8.55 (3.3/8.7)	6%	n.s.
Arsenic	0%/0%	13.6 (4.9/13.7)	11.2 (6.3/12.8)	21%	n.s.
Cadmium	0%/0%	0.34 (0.21/0.44)	0.39 (0.21/0.45)	−13%	n.s.
Cesium	0%/0%	4.0 (2.4/5.2)	3.7 (2.6/4.8)	8%	n.s.
Mercury	42%/46%	0.63 (0.20/0.74)	0.53 (0.20/0.61)	19%	n.s.
Nickel	0%/0%	4.3 (2.5/5.9)	4.0 (2.5/4.6)	8%	n.s.
Lead	3%/6%	0.59 (0.26/0.76)	0.35 (0.22/0.47)	72%	0.0001
Antimony	45%/54%	0.088 (0.04/0.10)	0.059 (0.04/0.07)	49%	0.02
Tin	10%/14%	2.7 (0.38/2.9)	0.99 (0.3/1.3)	177%	0.003
Thallium	0%/0%	0.17 (0.10/0.20)	0.11 (0.08/0.13)	50%	0.0001
Tungsten	1%/0%	0.29 (0.14/0.35)	0.25 (0.14/0.32)	0%	n.s.