Table 2 Comparison of the correlations between age and the slope of the NREM sleep EEG spectra in subjects with average and high intelligence (AIQ vs HIQ).

From: A set of composite, non-redundant EEG measures of NREM sleep based on the power law scaling of the Fourier spectrum

Recording location

ρAIQ

pAIQ

NAIQ

ρHIQ

pHIQ

NHIQ

pdifference

Fp1

.44

 < .001

79

.40

.001

60

.787

Fp2

.44

 < .001

85

.45

 < .001

63

.901

F3

.48

 < .001

84

.41

.001

64

.622

F4

.52

 < .001

83

.42

.001

64

.476

Fz

.57

 < .001

70

.45

 < .001

60

.370

F7

.39

.001

70

.45

 < .001

58

.660

F8

.45

 < .001

69

.43

.001

59

.900

C3

.44

 < .001

84

.45

 < .001

64

.956

C4

.45

 < .001

85

.43

 < .001

64

.896

Cz

.47

 < .001

70

.37

.004

60

.507

P3

.39

 < .001

85

.42

.001

64

.801

P4

.42

 < .001

85

.41

.001

64

.927

T3

.43

 < .001

70

.49

 < .001

59

.640

T4

.51

 < .001

70

.42

.001

60

.507

T5

.32

.007

70

.45

 < .001

58

.412

T6

.40

.001

70

.42

.001

60

.896

O1

.31

.004

85

.40

.001

64

.549

O2

.34

.002

84

.41

.001

64

.610

  1. Spearman rank correlations (ρ) were significant in both intelligence groups, however, the differences between the higher (HIQ) and average (AIQ) intelligence groups was not significant (pdifference). Bold italic values indicate statistical significance at p < .017.
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