Table 3.

Comparisons the differences of plasma amino acids between ASD and control group

Amino acid (µmol/L)	ASD group	Control group	Z-values	P-values
Ethanolamine	71.75	105.49	-4.27	<0.001
Pyroglutamic acid	23.55	51.39	-4.97	<0.001
Glycine	90.24	68.53	2.75	0.006
Sarcosine	104.15	40.69	8.04	<0.001
γ-​Amino-​n-​butyric acid	97.84	53.32	5.65	<0.001
δ-Aminolevulinic acid	90.62	55.60	4.62	<0.001
Hydroxyproline	75.09	98.82	-3.01	0.003
Glutamine	95.40	58.21	4.71	<0.001
Phenylalanine	76.90	95.20	-2.32	0.020
Citrulline	88.54	71.93	2.11	0.035
Glutamate	100.90	47.20	6.81	<0.001
Tryptophan	75.19	98.62	-2.97	0.003
Homocysteine	67.62	113.76	-5.85	<0.001
Ornithine	72.68	103.64	-3.92	<0.001
Histidine	77.12	94.75	-2.24	0.025
Lysine	76.17	99.66	-2.60	0.009
Glutathione	74.90	99.20	-3.08	0.002

ASD: Autism Spectrum Disorder