Table 2.

Multiple regression analysis results of serum levels of 5-HI, KYNA, and QUIN on working memory score.

	Schizophrenia			Healthy controls
	Standardized β	t	p	Standardized β	t	P
5-HI	0.15	2.10	0.04	−0.02	−0.19	0.85
KYNA	−0.18	−2.01	0.05	−0.02	−0.14	0.89
QUIN	0.06	0.68	0.49	0.11	0.75	0.46
Sex	0.16	2.04	0.04	0.16	1.18	0.24
Age	−0.02	−0.26	0.80	−0.10	−0.10	0.92
Model	F = 3.18, p = 0.01			F = 0.42, p = 0.83

5-HI 5-hydroxyindole, KYNA kynurenic acid, QUIN uinolinic acid.

Bold values indicates statistical significance at p < 0.05.