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Table 3 Results for the test-retest investigation a

From: A computerized neuropsychological test battery designed for idiopathic normal pressure hydrocephalus

Computer test

Test 1 N = 44 median (IQR) (Day 1)

Retest N = 44 median (IQR) (Day 7 - 65)

Difference, median (IQR)

p

SEm

Reliability

Two choice reaction [ms]

737 (660 - 822)

735 (634 - 818)

−16 (-62 - 28)

0.06b

51

0.75

Stroop congruent [ms]

846 (790 - 924)

841 (787 - 919)

−3 (-53 - 23)

0.4c

56

0.74

Stroop incongruent [ms]

1073 (952 - 1371)

1021 (865 - 1258)

−93 (-184 - 21)

<0.01c

149

0.83

Ten word list e #

20 (17 - 22)

22.5 (19 - 24.25)

2 (0.5 - 3)

<0.001b

2.1

0.67

Delayed recall e #

6 (5 - 8)

7 (4.75 - 8)

0 (-1 - 1)

0.78 c

1.2

0.74

Delayed recognition e #

9 (9 - 10)

9 (8 - 10)

0 (-1 - 1)

0.65 c

0.9

0.70

Trail making test A [s]

39.9 (36.0 - 48.8)

38.2 (33.5 - 44.7)

−2.2 (-7.0 - 2.4)

< 0.05c

6.5

0.87

Trail making test B [s]

78.2 (63.6 - 99.2)

74.7 (62.0 - 93.1)

−5.9 (-14.5 - 2.7)

< 0.05c

14.3

0.83

Figure copy task [%]

90.9f

81.8f

N/A

0.22 d

N/A

0.57

Four finger tapping e #

108 (97 -149)

123 (103 -173)

12 (3 - 22)

<0.001c

15.8

0.90

  1. aIQR = Interquartile range; p = significance in score difference between test and retest; SEM = Standard Error of Measurement.
  2. bPaired t-test.
  3. cWilcoxon signed-rank test.
  4. dMcNemar test.
  5. eTests redesigned during the study and only 26 of the 44 participants in the reliability group took the slightly modified battery.
  6. fPercent who scored “correct”.