Assessment of Hair Aluminum, Lead, and Mercury in a Sample of Autistic Egyptian Children: Environmental Risk Factors of Heavy Metals in Autism

Table 3

Comparison between cases and controls as regards heavy metal levels.

	Group						P
	Cases			Controls
	Mean	±SD	Median	Mean	±SD	Median
Lead level (mg/kg)	3.31	3.92	2.04	2.06	2.45	1.32
Mercury level (mg/kg)	0.39	0.37	0.28	0.25	0.16	0.20
Aluminium level (mg/kg)	59.19	37.98	53.00	16.78	17.31	11.11

Mann-Whitney test.