Table 2.

Mean symptom severity as rated by the PANSS and BACS performance for the whole sample for each study visit

	Baseline			2-week follow-up		6-week follow-up				Baseline vs 2 weeks	2 weeks vs 6 weeks	Baseline vs 6 weeks
Variable	N	M	SD	N	M	SD	N	M	SD	Wilcoxon signed-rank	Wilcoxon signed-rank	Wilcoxon signed-rank
PANSS positive	45	11.93	4.77	36	9.17	5.36	38	7.26	5.13	Z=2.76, p=0.006*	Z=2.67, p=0.008*	Z=4.50, p<0.001*
PANSS negative	45	10.36	6.87	36	10.31	7.15	38	9.58	7.78	Z=0.78, p=0.435	Z=0.62, p=0.535	Z=1.17, p=0.242
PANSS general	45	19.40	8.57	36	16.64	10.60	38	15.74	10.11	Z=3.21, p=0.001*	Z=2.48, p=0.013*	Z=0.64, p=0.524
PANSS total	45	41.69	16.11	36	36.11	20.03	38	32.58	20.04	Z=3.10, p=0.002*	Z=1.46, p=0.144	Z=3.35, p<0.001*
BACS verbal memory	41	37.83	14.02	32	41.16	13.50	36	44.56	15.02	Z=−3.14, p=0.002*	Z=−3.15, p=0.002*	Z=−3.88, p<0.001*
BACS digit sequencing	38	18.03	4.06	32	17.84	4.33	34	17.85	4.69	Z=−0.78, p=0.433	Z=−0.40, p=0.688	Z=0.40, p=0.687
BACS verbal fluency	42	28.60	7.85	31	31.87	9.47	35	30.20	8.38	Z=−1.96, p=0.050*	Z=0.83, p=0.405	Z=−1.62, p=0.105
BACS token motor	39	65.36	10.83	32	65.56	17.81	34	61.38	20.94	Z=−1.30, p=0.193	Z=−0.55, p=0.583	Z=−0.24, p=0.812
BACS symbol coding	39	40.15	13.13	32	45.69	12.56	32	47.25	11.96	Z=−2.25, p=0.025*	Z=−1.07, p=0.284	Z=−3.29, p=0.001*
BACS ToL	37	14.84	4.48	29	17.38	3.29	32	16.28	4.13	Z=−3.24, p=0.001*	Z=1.45, p=0.148	Z=−2.42, p=0.016*
BACS t-score	33	26.67	11.98	28	34.14	11.68	30	30.87	14.95	Z=−3.79, p<0.001*	Z=−0.29, p=0.769	Z=−3.66, p<0.001*
BACS z-score	33	−2.34	1.19	28	−1.59	1.17	30	−1.91	1.50	Z=−3.85, p<0.001*	Z=−0.23, p=0.820	Z=−3.67, p<0.001*

*Significant at p=0.05 level.

BACS, Brief Assessment of Cognition in Schizophrenia; PANSS, Positive and Negative Symptom Scale; ToL, Tower of London.