Table 2. Population neuropsychological characteristics.

Variables (median/range/SD)	Controls, N=41	Amyloid-positive MCI, N=28	Poststroke, N=27
General screening test
MMSE	30.0/28–30/0.6	28.0/25–29/1.1a	29.0/26–30/1.2b
Neuropsychology (missing)	32 (9)	27 (1)	26 (1)
Memory
Word list memory; immediate recall (RAVLT)	49.5/32–63/8.8	35.0/18–60/12.2c	46.0/21–63/12.2d
Word list memory; delayed recall (RAVLT)	51.0/33–75/10.8	34.0/21–62/12.9e	42.5/27–75/13.7f
Story memory; immediate recall (WMS-R)	Not available	45.6/31–62/9.58	57.1/34–73/8.6g
Story memory; delayed recall (WMS-R)	Not available	45.6/27–68/12.0	54.7/38–73/9.4h
Psychomotor speed
D-KEFS Stroop 1 (Color naming)	51.5/43-63/4.5	40.0/0–60/14.2i	47.0/20–60/13.2j
D-KEFS Stroop 2 (Word reading)	51.5/43-63/4.8	50.0/10–60/11.6k	47.0/7–60/14.0l
Digit-symbol (WAIS-III)	Not available	40/23–63/9.32	43/30–60/8.55m
Executive functions
D-KEFS Stroop 3 (Color-Word response inhibition)	55.0/37-67/7	50.0/0–63/13.7n	47.0/20–67/13.4o
D-KEFS Stroop 4 (Color-Word Switching)	57/37-67/6.6	41.5/20–60/12.5p	47.0/20–63/11.0q
Letter-number sequencing (WAIS-III)	50/0-67/11.8	43.0/30–63/8.15r	47.0/30-60/8.11s

Abbreviations: D-KEFS, Delis-Kaplan Executive Function System; MCI, mild cognitive impairment; MMSE, mini-mental state examination; RAVLT, Rey Auditory Verbal Learning Test; SD, standard deviation; WAIS-III, Wechsler Adult Intelligence Scale – Third Edition; WMS-R, Wechsler Memory Scale – Revised. All neuropsychological variables (except mini-mental status examination) are T scores. Figures in bold are significantly different from controls, underlined figures are significantly different from mild cognitive impairment.

^aMann–Whitney U=52, P<0.001 compared with controls.

^bMann–Whitney U=240, P=0.002 compared with controls, Mann–Whitney U=184, P=0.004 compared with MCI.

^cMann–Whitney U=146, P<0.001.

^dMann–Whitney U=336, P=0.207 comparet with controls; Mann–Whitney U=184, P=0.003 compared with MCI.

^eMann–Whitney U=166, P<0.001 compared with controls.

^fMann–Whitney U=307, P=0.088 compared with controls; U=223, P=0.025 compared with MCI.

^gMann–Whitney U=165, P=0.002 compared with MCI.

^hMann–Whitney U=166, P=0.002 compared with MCI.

ⁱMann–Whitney U=249, P=0.005 compared with controls.

^jMann–Whitney U=264, P=0.016 compared with controls; Mann–Whitney U=336, P=0.782 compared with MCI.

^kMann–Whitney U=346, P=0.184 compared with controls.

^lMann–Whitney U=271, P=0.021 compared with controls; Mann–Whitney U=299, P=0.352 compared with MCI.

^mMann–Whitney U=333, P=0.747 compared with MCI.

ⁿMann–Whitney U=264, P=0.010 compared with controls.

^oMann–Whitney U=276, P=0.027 compared with controls; Mann–Whitney U=351, P=.993 compared with MCI.

^pMann–Whitney U=120, P<0.001 compared with controls.

^qMann–Whitney U=231, P=0.003 compared with controls; Mann–Whitney U=244, P=0.083 compared with MCI.

^rMann–Whitney U=260, P=0.005 compared with controls.

^sMann–Whitney U=328, P=0.118 compared with controls; Mann–Whitney U=281, P=0.206 compared with MCI.