Table 4.

Spearman correlations between striatal rCBF, confounding variables and PANSS negative factor scores in patients with schizophrenia

Correlation factor	Mean rCBF ventral striatum		Mean rCBF dorsal striatum
	r27	p value	r27	p value
PANSS positive factor	−0.15	0.44	−0.24	0.21
PANSS negative factor	0.17	0.39	0.30	0.12
CDSS total score	0.23	0.24	0.35	0.06
Chlorpromazine equivalents	−0.05	0.80	−0.17	0.39
Composite cognitive ability score	0.27	0.17	0.11	0.58
Age	−0.39	0.04	−0.50	0.006

CDSS = Calgary Depression Scale for Schizophrenia; PANSS = Positive and Negative Syndrome Scale; rCBF = regional cerebral blood flow.