Skip to main content

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 * \({\text{P}}\, \le \,0.05\)