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

Table 7

Comparison between CARS degrees and levels of heavy metals.

	CARS classification						P
	Mild to moderate			Severe
	Mean	SD	Median	Mean	SD	Median
Mercury level (mg/kg)	0.31	0.3	0.25	0.43	0.41	0.34	0.132
Lead level (mg/kg)	2.27	1.98	1.93	3.87	4.56	2.3	0.171
Aluminum level (mg/kg)	60.6	36.68	58.12	58.44	38.92	49.47	0.646

Mann-Whitney test, Student’s -test.