20.500.12556/RUL-143396 Characterization and separation of preterm and term spontaneous, induced, and cesarean EHG records To improve the understanding of the underlying physiological processes that lead to preterm birth, and different term delivery modes, we quantitatively characterized and assessed the separability of the sets of early (23rd week) and later (31st week) recorded, preterm and term spontaneous, induced, cesarean, and induced-cesarean electrohysterogram (EHG) records using several of the most widely used non-linear features extracted from the EHG signals. Linearly modeled temporal trends of the means of the median frequencies (MFs), and of the means of the peak amplitudes (PAs) of the normalized power spectra of the EHG signals, along pregnancy (from early to later recorded records), derived from a variety of frequency bands, revealed that for the preterm group of records, in comparison to all other term delivery groups, the frequency spectrum of the frequency band B0L (0.08–0.3 Hz) shifts toward higher frequencies, and that the spectrum of the newly identified frequency band B0L’ (0.125–0.575 Hz), which approximately matches the Fast Wave Low band, becomes stronger. The most promising features to separate between the later preterm group and all other later term delivery groups appear to be MF (p = 1.1 ⋅ 10$^{-5}$) in the band B0L of the horizontal signal S3, and PA (p = 2.4 ⋅ 10$^{-8}$) in the band B0L’ (S3). Moreover, the PA in the band B0L’ (S3) showed the highest power to individually separate between the later preterm group and any other later term delivery group. Furthermore, the results suggest that in preterm pregnancies the resting maternal heart rate decreases between the 23rd and 31st week of gestation. electrohysterogram characterization of EHG records separation of EHG records preterm birth prediction term birth induced birth cesarean section FWL band FWH band elektrohisterogram karakterizacija EHG posnetkov separacija EHG posnetkov napovedovanje prezgodnjega poroda terminski porod induciran porod carski rez FWL področje FWH področje true false true Angleški jezik Slovenski jezik Članek v reviji 2022-12-19 10:00:30 2022-12-19 10:00:31 2023-01-20 03:37:33 0000-00-00 00:00:00 2022 0 0 19 str. pt. A, art. 106238 Vol. 151 Dec. 2022 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 004:618.39 0010-4825 10.1016/j.compbiomed.2022.106238 128179459 1-s2.0-S0010482522009465-main.pdf 1-s2.0-S0010482522009465-main.pdf 1 6B2FB0B9106B8361AD3385C1718DB741 be0a0be1a1a4835f0436d5f899503ba0050a42893d1b8229a825f5da5c504073 4b090aea-7f80-11ed-9c94-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=165053 https://www.sciencedirect.com/science/article/pii/S0010482522009465 0 68361d19-7f7b-11ed-9c94-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=165049 Fakulteta za računalništvo in informatiko Medicinska fakulteta 0 0 0