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Table 7 Level of the individual cognitive functions—differences between patients with schizophrenia (N = 128) versus the control group (N = 68)

From: Cognitive impairment in schizophrenia across age groups: a case–control study

Scale Schizophrenia (N = 128) Controls (N = 68) Test of difference Sign.
  M sd M sd Test U p
WSCT correct answers 26,61 11,318 35,76 9,244 2019,5 0,000
WSCT total errors 36,37 11,821 27,37 7,191 2028,5 0,000
WSCT perseverative answers 25,05 17,749 15,05 7,643 2942,5 0,001
WSCT perseverative errors 20,66 15,737 12,88 5,776 2970,5 0,001
WSCT conceptual level 16,39 13,872 28,14 10,099 1995,5 0,000
WSCT categories achieved 0,66 ,864 1,80 2,623 2091,5 0,000
WSCT to complete 1st category 41,90 26,041 23,28 19,002 2754,0 0,000
WSCT failure to maintain set 0,66 1,022 0,94 0,864 3194,5 0,004
RAVLT A1-A5 26,84 11,124 43,51 10,437 1152 0,000
RAVLT A6 5,20 2,957 9,25 3,086 1509,5 0,000
RAVLT A7 4,25 2,694 8,81 3,021 1174,5 0,000
RAVLT list B 2,96 1,428 5,34 1,523 1104 0,000
RAVLT Recognition ,71733 ,196041 ,90170 ,132401 1719 0,000
ROCFT similarity ,52 ,501 ,99 ,122 2308,5 0,000
ROCFT main elements 3,89 2,040 6,36 1,366 1406,500 0,000
TMT A 81,01 58,753 32,84 14,624 1027 0,000
TMT B 274,73 298,46 67,74 31,338 886,5 0,000
Wechsler digits forward 6,11 2,185 7,84 1,920 2422,000 0,000
Wechsler digits backward 3,70 1,638 6,07 1,645 1360 0,000
Verbal fluency 10,17 4,864 16,72 4,836 1429,5 0,000
Stroop words 77,17 18,158 94,04 12,942 1921,500 0,000
Stroop colors 55,38 16,487 73,21 13,521 1651 0,000
Stroop Interferention 29,49 12,251 44,35 10,108 1458 0,000
Stroop Coefficient 31,7587 8,06665 40,9462 6,19602 1539 0,000