Table 4

Clinical and sociodemographic factors for WCST scores of patients with schizophrenia in the current study (main analysis) and for previous studies

	Patients with schizophrenia (n=131)		Previous studies
	Main analysis
	Factor 1 score	Factor 2 score	CA†	PE†	TE†
Sex			n/a	n/a	n/a
Age	***		ns‡	○‡	n/a
Education years	**		ns‡	ns‡	n/a
Age of onset			ns§	○§	n/a
Duration of illness		*	ns‡	ns‡	n/a
Chlorpromazine equivalent doses			n/a	n/a	n/a
PANSS score
Positive (7–49)			ns¶	n/a	n/a
Negative (7–49)	*		○¶	n/a	n/a
General (16–112)			ns¶	n/a	n/a
Hit rate	0.77	0.58	n/a	n/a	n/a

*p<0.05.
**p<0.01.
***p<0.001.
†CA, PE and TE were included in factor 1 in a previous study.
‡Reference 10.
§Reference 23.
¶Reference 9.
CA, categories achieved; DMS, difficulties of maintaining set; n/a, data not available; ns, not significant; PANSS, positive and negative syndrome scale; PEM, perseverative errors in Milner; PEN, perseverative errors in Nelson; TE, total errors; WCST, Wisconsin Card Sorting Test.