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Table 4 Comparison of ERP parameters between MCI stable and AD-converting subgroups (Statistically significant differences are shown in bold)

From: Usefulness of event-related potentials in the assessment of mild cognitive impairment

Parameter

Total

MCI stable

AD-converters

Statistic

p

N (female)

91(56)

86(54)

5(2)

χ2 = 1.037

0.309

Age Mean (SD)

67.1(6.9)

66.8(6.7)

72.6(9.5)

Z = -1.666

0.096

MMSE Median

28

28

26

Z = -1.858

0.063

(IQR)

(26–29)

(26–29)

(24–28)

  

N200L median

240

238.5

306

Z = -3.580

< 0.001

(IQR), ms

(225–265)

(224–258)

(291–327)

  

P300L median

394

394

467

Z = -1.916

0.055

(IQR), ms

(370–424)

(370–422)

(387–518)

  

SWL median

527

528

522

Z = -0.165

0.869

(IQR), ms

(488–571)

(490–570)

(474–684)

  

N200A median

8.75

8.41

11.25

Z = -1.734

0.083

(IQR), μV

(6.25–11.25)

(6.25–11.25)

(8.82–16.22)

  

P300A median

13.90

13.95

13.75

Z = -0.944

0.345

(IQR), μV

(10.45–19.65)

(10.50–20.0)

(9.40–15.25)