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Table 1 Demographic characteristics and neuropsychological test domain scores

From: Prefrontal intra-individual ERP variability and its asymmetry: exploring its biomarker potential in mild cognitive impairment

Characteristic

CN, N = 8781

MCI, N = 3901

T- statistic

p-value2

Demographic characteristics

Age

72.06 (6.36)

73.82 (6.54)

-4.509

< 0.001

Sex

  

3.635

0.057

Female

492 / 878 (56%)

196 / 390 (50%)

  

Male

386 / 878 (44%)

194 / 390 (50%)

  

EDUYR

10.83 (4.36)

11.14 (4.48)

-1.151

0.3

Neuropsychological test scores

MMSE

27.68 (1.90)

26.31 (2.68)

9.150

< 0.001

Attention

9.71 (2.19)

8.54 (1.94)

9.479

< 0.001

Language

0.21 (0.28)

-0.09 (0.47)

11.501

< 0.001

Visuospatial

0.54 (0.37)

0.25 (1.89)

2.960

0.003

Memory

0.30 (0.58)

-0.44 (0.63)

19.753

< 0.001

Frontal

0.23 (0.57)

-0.24 (0.70)

11.696

< 0.001

  1. 1Mean (SD); n / N (%); 2two sample t-test; Pearson’s Chi-squared test; Welch Two Sample t-test
  2. Significant features (p-value ≤ 0.05) are bolded