Table 3.
Mean and SD of EHG characteristics of 7- and 14-day women. p-value < 0.05 (grey shading) indicates significant differences between both groups.
| TTD < 7 | TTD ≥ 7 | p-Value | TTD < 14 | TTD ≥ 14 | p-Value | |
|---|---|---|---|---|---|---|
| Peak-to-peak amplitude (µV) | 144.0 ± 72.4 | 154.8 ± 206.5 | 0.482 | 136.4 ± 63.5 | 160.8 ± 224.5 | 0.977 |
| DF1 (Hz) | 0.269 ± 0.02 | 0.266 ± 0.019 | 0.650 | 0.268 ± 0.02 | 0.266 ± 0.019 | 0.520 |
| DF2 (Hz) | 0.399 ± 0.015 | 0.401 ± 0.024 | 0.966 | 0.397 ± 0.014 | 0.403 ± 0.025 | 0.374 |
| H/L Ratio | 0.410 ± 0.084 | 0.428 ± 0.073 | 0.237 | 0.42 ± 0.09 | 0.426 ± 0.068 | 0.344 |
| Decile 1 (Hz) | 0.223 ± 0.007 | 0.223 ± 0.006 | 0.976 | 0.224 ± 0.008 | 0.222 ± 0.005 | 0.460 |
| Decile 2 (Hz) | 0.243 ± 0.012 | 0.243 ± 0.011 | 0.579 | 0.245 ± 0.015 | 0.242 ± 0.009 | 0.797 |
| Decile 3 (Hz) | 0.262 ± 0.016 | 0.264 ± 0.014 | 0.509 | 0.265 ± 0.018 | 0.263 ± 0.012 | 0.642 |
| Decile 4 (Hz) | 0.284 ± 0.019 | 0.287 ± 0.017 | 0.369 | 0.287 ± 0.02 | 0.286 ± 0.016 | 0.974 |
| Decile 5 (Hz) | 0.308 ± 0.023 | 0.312 ± 0.019 | 0.383 | 0.311 ± 0.022 | 0.312 ± 0.018 | 0.781 |
| Decile 6 (Hz) | 0.336 ± 0.028 | 0.341 ± 0.022 | 0.271 | 0.338 ± 0.025 | 0.341 ± 0.022 | 0.445 |
| Decile 7 (Hz) | 0.371 ± 0.032 | 0.380 ± 0.026 | 0.109 | 0.374 ± 0.028 | 0.381 ± 0.027 | 0.177 |
| Decile 8 (Hz) | 0.427 ± 0.039 | 0.439 ± 0.033 | 0.077 | 0.431 ± 0.037 | 0.439 ± 0.034 | 0.161 |
| Decile 9 (Hz) | 0.525 ± 0.045 | 0.541 ± 0.038 | 0.103 | 0.530 ± 0.044 | 0.541 ± 0.038 | 0.221 |
| Teager energy (a.u.) | 8.6 ± 8.8 | 21.6 ± 19.9 | 0.183 | 9.1 ± 8.6 | 23.9 ± 19.8 | 0.440 |
| Binary Lempel-Ziv | 0.388 ± 0.066 | 0.437 ± 0.075 | 0.002 | 0.411 ± 0.075 | 0.435 ± 0.075 | 0.062 |
| Multistate Lempel-Ziv | 0.210 ± 0.058 | 0.241 ± 0.062 | 0.011 | 0.231 ± 0.062 | 0.236 ± 0.063 | 0.510 |
| Sample entropy | 2.173 ± 0.308 | 2.272 ± 0.243 | 0.143 | 2.261 ± 0.27 | 2.245 ± 0.257 | 0.158 |
| Spectral entropy | 0.874 ± 0.018 | 0.887 ± 0.022 | 0.003 | 0.881 ± 0.02 | 0.886 ± 0.022 | 0.078 |
| Fuzzy entropy | 0.264 ± 0.06 | 0.308 ± 0.064 | 0.002 | 0.287 ± 0.065 | 0.304 ± 0.066 | 0.152 |
| Time reversibility | 4.858 ± 3.182 | 3.554 ± 2.049 | 0.011 | 4.538 ± 2.649 | 3.467 ± 2.161 | 0.001 |
| SD1 | 2.86 ± 1.62 | 3.54 ± 3.18 | 0.126 | 3.038 ± 1.527 | 3.59 ± 3.434 | 0.385 |
| SD2 | 26.28 ± 13.03 | 27.02 ± 25.19 | 0.501 | 25.28 ± 11.57 | 27.68 ± 27.24 | 0.809 |
| SD1/SD2 | 0.116 ± 0.032 | 0.141 ± 0.045 | 0.003 | 0.129 ± 0.04 | 0.14 ± 0.045 | 0.119 |