Interaction between catechol-O-methyltransferase Val/Met polymorphism and cognitive reserve for negative symptoms in schizophrenia

Table 2 Correlations between negative symptoms and intelligence quotient, demographics, clinical characteristics in total participants (n = 54)

		Information	Similarities	Picture completion	Block design	WAIS-RC total	Education	Age	CE	Duration of illness
PANSS negative	r value	-0.405	-0.475	-0.332	-0.385	-0.527	-0.384	0.019	-0.243	-0.119
	P value	0.002	< 0.001	0.014	0.004	< 0.001	0.004	0.894	0.076	0.391

PANSS: Positive and negative syndrome scale; WAIS-RC: Chinese version of the Wechsler adult intelligence scale; CE: Chlorpromazine equivalents.