Table 2.

Neuropsychological tests by diagnostic groups

	FEPa (n = 119)		CHR-Pb (n = 54)		CHR-Nc (n = 46)		All (n = 219)			FEP/CHR-P	FEP/CHR-N	CHR-P/CHR-N
	Mean	SD	Mean	SD	Mean	SD	Mean	SD	p1	p2	p3	p4
Verbal skills
WAIS III Vocabulary	42.61	10.84	42.80	10.57	43.07	10.85	50.14	7.54	0.970	0.914	0.806	0.901
MCCB Category Fluency	22.23	5.71	22.98	5.24	24.52	7.39	24.36	6.12	0.090	0.444	0.029	0.202
MCCB S-words	15.11	5.56	15.54	5.48	16.83	4.45	16.51	5.40	0.180	0.625	0.065	0.229
Attention/vigilance
TMT-A	32.94	10.18	28.17	8.33	31.52	10.93	29.70	9.83	0.015	0.004	0.411	0.093
TMT-B	92.18	66.00	86.24	82.34	66.50	38.08	75.81	58.28	0.082	0.583	0.026	0.137
Speed of processing
WAIS III Digit Symbol	66.37	15.78	73.44	16.85	74.59	15.54	75.24	16.97	0.002	0.008	0.003	0.722
Working memory
WAIS III Letter-Number Span	9.97	2.22	10.59	2.02	11.17	2.34	10.94	2.38	0.006	0.088	0.002	0.189
WMS-R Spatial Span	16.87	3.01	17.57	2.95	17.22	2.15	17.63	2.88	0.313	0.126	0.477	0.523
Verbal learning
HVLT immediate	25.94	4.29	27.31	4.60	28.89	3.95	27.79	4.43	< 0.001	0.053	< 0.001	0.069
HVLT delayed	9.18	2.12	10.19	1.90	10.35	1.72	10.04	1.95	< 0.001	0.002	0.001	0.684
Visual learning
MCCB BVMT-R	24.37	6.98	26.96	6.43	26.65	6.51	26.87	6.59	0.029	0.020	0.053	0.819
Reasoning and problem solving
MCCB NAB Mazes	20.43	4.89	22.07	3.59	22.24	4.15	21.78	4.18	0.018	0.025	0.020	0.854
WCST
Total number of errors	30.20	24.54	28.24	19.23	22.35	18.18	28.07	22.22	0.125	0.589	0.042	0.185
Perseverative responses	18.73	19.06	16.63	12.98	12.91	11.21	16.99	16.39	0.122	0.433	0.041	0.257
Perseverative errors	16.36	15.00	15.11	10.91	11.87	9.47	15.11	13.12	0.143	0.560	0.049	0.218
Percent conceptual level responses	64.51	21.74	66.07	16.94	71.46	17.17	66.36	19.84	0.130	0.630	0.044	0.176
Number of categories completed	4.96	1.68	5.11	1.42	5.39	1.31	5.09	1.55	0.272	0.547	0.108	0.368
Ro-Exner (RCS)
Perceptual thinking index (PTI)	1.25	1.34	1.37	1.19	0.70	1.07	1.16	1.27	0.016	0.566	0.011	0.008
Distorted perception (X-%)	0.28	0.11	0.28	0.09	0.21	0.08	0.26	0.10	0.001	0.824	0.001	0.002
Incoherent thinking (WSum6)	9.90	8.70	9.69	7.56	7.02	6.50	9.24	8.06	0.108	0.871	0.040	0.099
Appropriate answers (XA%)	0.70	0.12	0.70	0.09	0.76	0.09	0.71	0.11	0.002	0.923	0.001	0.003
Extended appropriate answers (WDA%)	0.73	0.12	0.73	0.09	0.79	0.08	0.75	0.11	0.003	0.902	0.001	0.005

^aFirst episode psychosis

^bConfirmed clinical high risk to psychosis

^cNonconfirmed clinical high risk to psychosis; p1 = ANOVA for all patients; p2 = ANOVA for FEP/CHR-P; p3 = ANOVA for FEP/CHR-N; p4 = ANOVA for CHR-P/CHR-N