Table 3.

Selected subtest comparisons.

		Pattern of Discordance
Comparator Score	Number of Discordant SC-NC pairs	SC VCI > Comparator & NC VCI ≤ Comparator	SC VCI ≤ Comparator & NC VCI > Comparator	p
Working Memory component scores
Spatial Span	44	20 (45%)	24 (55%)	.652
Letter Number Sequencing	53	31 (58%)	22 (42%)	.272
Visual Memory component scores
Family Pictures Immediate	57	45 (79%)	12 (21%)	<.001
Family Pictures Delayed	52	43 (83%)	9 (17%)	<.001
Visual Reproductions Immediate	58	51 (88%)	7 (12%)	<.001
Visual Reproductions Delayed	31	15 (48%)	16 (52%)	1.00

Note: “Discordant pairs” are those in which the patient and NC in a given pair had discordant results in regard to whether his or her comparator score was significantly worse than his or her VCI score. The p-values reflect binomial test against the null hypothesis that, among such discordant pairs, the pair member whose comparator score is lower than VCI is equally likely to be from the patient versus NC group (i.e., the null hypothesis is that two proportions both equal 50%).

Key to abbreviations: schizophrenia = SC; normal comparison subject = NC, Verbal Comprehension Index = VCI