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Table 4 Independent-samples t test between the group 2 and 3 and beta frequency bands calculated using the ApEn method at the Fz point

From: Analysis of EEG entropy during visual evocation of emotion in schizophrenia

 

Type

HVLA

LVLA

LVHA

Section:

1

2

3

1

2

3

1

2

3

Frequency

β 1(12–15 Hz)

 Moderately ill

.583

.597

.589

.587

.587

.590

.588

.587

.573

 Mean (SD)

(.069)

(.040)

(.048)

(.055)

(.042)

(.043)

(.050)

(.046)

(.062)

 Markedly ill

.625

.624

.627

.626

.627

.627

.621

.624

.622

 Mean (SD)

(.009)

(.006)

(.005)

(.005)

(.004)

(.005)

(.025)

(.016)

(.018)

 t value

−2.462

−2.801

−3.231

−2.860

−3.999

−3.616

−2.417

−3.126

−3.086

 p value

.025*

.012*

.005**

.011*

.001**

.002**

.024*

.005**

.006**

β 2(15–18 Hz)

 Moderately ill

.538

.543

.540

.538

.540

.540

.537

.536

.537

 Mean (SD)

(.071)

(.067)

(.067)

(.064)

(.067)

(.065)

(.064)

(.067)

(.066)

 Markedly ill

.608

.606

.609

.606

.606

.605

.602

.605

.607

 Mean (SD)

(.013)

(.012)

(.008)

(.006)

(.013)

(.011)

(.016)

(.021)

(.014)

 t value

−4.050

−3.812

−4.214

−4.325

−3.957

−4.014

−4.047

−4.052

−4.276

 p value

.001**

.001**

.001**

.001**

.001**

.001**

.001**

.001**

.000***

β 3(18–30 Hz)

 Moderately ill

.564

.575

.568

.569

.567

.570

.568

.573

.563

 Mean (SD)

(.051)

(.044)

(.043)

(.047)

(.045)

(.045)

(.046)

(.045)

(.051)

 Markedly ill

.554

.555

.557

.554

.558

.555

.556

.554

.552

 Mean (SD)

(.015)

(.015)

(.015)

(.014)

(.012)

(.013)

(.019)

(.018)

(.014)

 t value

.788

1.735

1.041

1.275

.821

1.381

.960

1.581

.897

 p value

.441

.092

.310

.218

.422

.184

.344

.124

.381

  1. p < .05, ** p < .01 *** p < .001