SDNN/RMSSD as a Surrogate for LF/HF: A Revised Investigation

<table>Normal distribution of Pearson correlation coefficients for 5-minute and 3-minute epochs. The <svg height="7.1624999" id="M32" style="vertical-align:-0.11285pt" version="1.1" viewbox="0 0 8.7250004 7.1624999" width="8.7250004" xmlns="http://www.w3.org/2000/svg">
<g transform="matrix(1.25,0,0,-1.25,0,7.1625)">
<g transform="translate(72,-66.27)">
<text transform="matrix(1,0,0,-1,-71.95,66.44)">
<tspan style="font-size: 12.50px; " x="0" y="0">𝑥</tspan>
</text>
</g>
</g>
</svg>-axis indicates the correlation coefficient and the <svg height="9.8625002" id="M33" style="vertical-align:-2.29482pt" version="1.1" viewbox="0 0 7.875 9.8625002" width="7.875" xmlns="http://www.w3.org/2000/svg">
<g transform="matrix(1.25,0,0,-1.25,0,9.8625)">
<g transform="translate(72,-64.11)">
<text transform="matrix(1,0,0,-1,-71.95,66.45)">
<tspan style="font-size: 12.50px; " x="0" y="0">𝑦</tspan>
</text>
</g>
</g>
</svg>-axis indicates the percentage of the related coefficient.</table>

Modelling and Simulation in Engineering

SDNN/RMSSD as a Surrogate for LF/HF: A Revised Investigation

Figure 5