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Table 3 Levene’s test (statistics based on means) of variances equality between LEI and SP (geographical region) and stroke and control participants (participants type)

From: Pooling data from different populations: should there be regional differences in cerebral haemodynamics?

 

Geographical Region

Participants Type

F

p value

F

p value

CBFv, cm.s−1

0.721

0.399

0.195

0.662

CrCP, mm Hg

4.276

0.080

3.153

0.091

RAP, mmHg.s.cm− 1

1.496

0.230

2.231

0.120

Coherence VLF range

2.099

0.493

2.443

0.407

Coherence LF range

1.727

0.610

1.987

0.540

Coherence HF range

0.929

0.703

1.592

0.622

Normalized gain VLF range, % mm Hg− 1

0.331

0.901

0.486

0.838

Normalized gain LF range, % mm Hg− 1

0.297

0.882

3.089

0.567

Normalized gain HF range, % mm Hg−1

3.921

0.098

3.444

0.612

Phase VLF range, radians

2.982

0.801

2.491

0.475

Phase LF range, radians

2.001

0.712

1.984

0.399

Phase HF range, radians

2.665

0.723

2.091

0.523

ARI

0.078

0.762

0.510

0.950

  1. CBFv Cerebral blood flow velocity, CrCP Critical closing pressure, RAP Resistance Area Product, VLF, LF, HF Very low, low and high frequency ranges, respectively