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. 2020 Jul 10;15(7):e0236123. doi: 10.1371/journal.pone.0236123

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© 2020 Montero-Nava et al

This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

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Fig 4 — Comparison between the raw parameters of fetal heart rate (FHR) and electrohysterogram (EHG) coupling at the third trimester of pregnancy provided either by the maximum coefficient of coherence (C_RAW), the normalized cross-correlation coefficient (X-corrr_RAW) and cross-sample entropy (X-SampEn_RAW) or by the Bivariate Phase-Rectified Signal Averaging versions (BPRSA) of the maximum coefficient of coherence (C_BPRSA), the normalized cross-correlation coefficient (X-corrr_BPRSA) and the cross-sample entropy (X-SampEn_BPRSA): a) C_RAW vs. C_BPRSA (0.53±0.10 vs. 0.82±0.15); b) X-Corr_RAW vs. X-Corr_BPRSA (0.42±0.12 vs. 0.63± 0.17) and c): X-SampEn_RAW vs. X-SampEn_BPRSA (3.70±0.65 vs. 2.68±0.48), respectively. *p<0.0001 according to Wilcoxon matched-pairs signed-rank test.