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Table 4 The P value of ECG waveform features significant level among different lying positions

From: Lying position classification based on ECG waveform and random forest during sleep in healthy people

 

Left–supine

Left–right

Supine–right

QT

0.0059**

0.1341

0.2947

QTc

0.1148

0.0229*

0.1207

RR

0.0066**

0.0206*

0.4106

PR inter

0.3549

0.0881

0.9203

PR segment

0.1287

0.0222*

0.7313

ST inter

0.1023

0.1906

0.3491

ST segment

0.2737

0.3323

0.5255

P wide

0.1912

0.1905

0.2587

QS wide

0.1157

0.0975

0.3296

T wide

0.2199

0.0609

0.3164

TP segment

0.0111*

0.0182*

0.3068

P peak*

0.0028**

0.0039**

0.1516

R peak*

0.0143*

0.0235*

0.1003

S peak*

0.0360*

0.0831

0.6562

T peak*

0.0002***

0.0180*

0.0004***

QRS area*

0.0063**

0.0228*

0.2293

T area*

0.0000***

0.0814

0.0032**

T a/QRS a*

0.4441

0.0435*

0.0379*

QRSa–Ta*

0.0562

0.0369*

0.3981

Rp-Tp x

0.0191*

0.0696

0.4688

Rp-Tp y*

0.0307*

0.0316*

0.1696

Tpte

0.3207

0.3413

0.2490

QR*

0.0066**

0.0111*

0.1585

RS*

0.0418*

0.1086

0.0651

RT slope*

0.0244*

0.0205*

0.1921

RS slope*

0.2182

0.4109

0.0197*

ST slope*

0.0126*

0.4443

0.1886

S/R*

0.0014**

0.0207*

0.3539

T/R*

0.4710

0.2809

0.2560

Angleqsr*

0.0012**

0.0275*

0.4710

  1. The first column in this table includes 30 waveform features. To facilitate the observation, the amplitude features and double-direction features are marked by *. Columns 2, 3, and 4 show the significant level of the waveform features between two lying positions. *** \({\text{P}}\, \le \,0.001\), ** \({\text{P}}\, \le \,0.01\), and * \({\text{P}}\, \le \,0.05\)
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