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Table 2 Correlation analysis of ultra-short HRV features vs equivalent short ones

From: Ultra-short term HRV features as surrogates of short term HRV: a case study on mental stress detection in real life

 

Rest Phase

Stress Phase

HRV Features

3 vs 5 min

2 vs 5 min

1 vs 5 min

30 s vs 5 min

3 vs 5 min

2 vs 5 min

1 vs 5 min

30 s vs 5 min

MeanNN

0.984

0.890

0.975

0.936

0.985

0.937

0.955

0.964

StdNN

0.954

0.875

0.905

0.749

0.962

0.912

0.791

0.640

MeanHR

0.984

0.891

0.975

0.947

0.985

0.938

0.954

0.964

StdHR

0.914

0.789

0.796

0.635

0.971

0.904

0.784

0.696

RMSSD

0.961

0.914

0.946

0.859

0.983

0.928

0.915

0.852

NN50

0.972

0.883

0.949

0.822

0.971

0.920

0.905

0.894

pNN50

0.967

0.882

0.943

0.818

0.969

0.915

0.913

0.881

LF

0.894

0.886

–

–

0.921

0.916

–

–

HF

0.915

0.906

0.901

–

0.925

0.915

0.798

–

LF/HF

0.830

0.839

–

–

0.846

0.807

–

–

TotPow

0.897

0.882

–

–

0.900

0.905

–

–

SD1

0.961

0.914

0.945

0.862

0.983

0.928

0.915

0.852

SD2

0.956

0.865

0.876

0.707

0.941

0.898

0.755

0.694

ApEn

0.771

0.169

–

–

0.918

0.790

–

–

SampEn

0.855

0.666

0.681

–

0.931

0.826

0.599

–

D2

0.922

0.674

0.330

–

0.967

0.876

0.816

–

dfa1

0.661

0.687

0.637

–

0.927

0.908

0.799

–

dfa2

0.633

0.611

0.673

–

0.767

0.563

0.485

–

RPlmean

0.837

0.708

0.645

–

0.901

0.730

0.503

–

RPlmax

0.738

0.588

0.583

–

0.896

0.737

0.678

–

REC

0.880

0.643

0.608

–

0.892

0.689

0.513

–

RPadet

0.852

0.645

0.495

–

0.948

0.817

0.642

–

ShanEn

0.795

0.661

0.614

–

0.907

0.720

0.463

–

  1. All the correlations resulted significant (prho < 0.05); in bold Spearman’s correlation coefficient (rho) greater than 0.7; −: not computable
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BMC Medical Informatics and Decision Making

ISSN: 1472-6947

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