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Table 11 Correlation between HRV indices obtained from ECG and SCG on all recordings

From: Comparison of HRV indices obtained from ECG and SCG signals from CEBS database

HRV index \(R^2\) (reference algorithm) \(R^2\) (tested algorithm)
Mean NN 1.0000 0.9681
SDNN 0.9232 0.2738
RMSSD 0.6092 0.2047
NN50 0.3949 0.5800
pNN50 0.4410 0.0617
\({{\text{PSD}}}_{{\text{LF}}}\) 1.0000 0.9889
\({{\text{PSD}}}_{{\text{VLF}}}\) 0.9390 0.0132
\({{\text{PSD}}}_{{\text{HF}}}\) 1.0000 0.9895
LF/HF 0.9976 0.1326