The Term-Preterm EHG DataSet with Tocogram (TPEHGT DS)

Version 1.0 - 29 August 2018

When referencing this material, please cite:

Jager F, Libenšek S, Geršak K (2018) Characterization and automatic classification of preterm and term uterine records. PLoS ONE 13(8): e0202125. https://doi.org/10.1371/journal.pone.0202125. [bib]
@article{TPEHGTDS,
  author  = {Jager F, Libenšek S, Geršak K},
  title   = {Characterization and automatic classification of preterm and term uterine records.},
  journal = {PLoS ONE},
  volume  = {13},
  number  = {8},
  year    = {2018},
  month   = {August},
  pages   = {e0202125},
  doi     = {https://doi.org/10.1371/journal.pone.0202125},
  url     = {https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0202125}
}

Please also include the standard citation for PhysioNet:

Goldberger AL, Amaral LAN, Glass L, Hausdorff JM, Ivanov PCh, Mark RG, Mietus JE, Moody GB, Peng C-K, Stanley HE. PhysioBank, PhysioToolkit, and PhysioNet: Components of a New Research Resource for Complex Physiologic Signals. Circulation 101(23):e215-e220 [Circulation Electronic Pages; http://circ.ahajournals.org/content/101/23/e215]; 2000 (June 13). [bib]
@article{PhysioNet,
  author    = {Goldberger, Ary L. and Amaral, Luis A. N.
               and Glass, Leon and Hausdorff, Jeffrey M.
               and Ivanov, Plamen Ch. and Mark, Roger G.
               and Mietus, Joseph E. and Moody, George B.
               and Peng, Chung-Kang and Stanley, H. Eugene},
  title     = {{PhysioBank}, {PhysioToolkit}, and {PhysioNet}:
               Components of a New Research Resource for Complex
               Physiologic Signals},
  journal   = {Circulation},
  publisher = {American Heart Association, Inc.},
  volume    = {101},
  number    = {23},
  year      = {2000},
  month     = {June},
  pages     = {e215--e220},
  doi       = {10.1161/01.CIR.101.23.e215},
  issn      = {0009-7322},
  url       = {http://circ.ahajournals.org/content/101/23/e215}
}

Introduction

The Term-Preterm ElectroHysteroGram DataSet with Tocogram (TPEHGT DS) contains 26 four-signal 30-min uterine EHG records, i.e., three EHG signals accompanied by a simultaneously recorded external tocogram measuring mechanical uterine activity (TOCO signal) of pregnant women, and another five 30-min uterine records (EHG signals and TOCO signal) of non-pregnant women.

Data Description

The records of the pregnant women belong to pregnancies that resulted in spontaneous preterm delivery (13 preterm records from eight pregnancies), and to pregnancies that resulted in spontaneous term delivery (13 term records from ten pregnancies). The main objective of the dataset is to provide a set of annotated contraction intervals (annotated intervals related to uterine contractions), and another set of annotated non-contraction intervals (dummy intervals, i.e., intervals out of uterine contractions). The annotated contraction and dummy intervals of the records allow:

The dataset was developed at the Faculty of Computer and Information Science (Laboratory for Biomedical Computer Systems and Imaging), University of Ljubljana, Ljubljana, while the records were colected at the University Medical Centre Ljubljana, Department of Obstetrics and Gynecology. (Obtaining of the uterine records and the research were approved by the National Medical Ethics Committee of the Republic Slovenia: No. 32/01/97 and No. 108/09/09. The recording protocol (including position of the electrodes) was those which was also used during colecting the records of the Term-Preterm EHG Database (TPEHG DB).

The women participating in the study represented a sample of the general population. The TPEHGT DS contains 31 uterine records of which:

The records of pregnant women were obtained during regular check-ups in pregnancy around 31st week of pregnancy. The mean recording time and standard deviation of the records of pregnant women was 30.2 (± 2.76) weeks of pregnancy. For the manual annotating procedure, we used a graphic user interface and annotation editor. Besides visualizing original signals and annotation editing, the graphic user interface also allows calculating, and visualizing, spectra and spectrograms of the signals. Consensus about the annotated intervals was reached by two annotators.

The EHG signals of the records were colected from the abdominal surface. The electrodes (AgCl2) to measure EHG signals of the records were placed in two horizontal rows, symmetrically above and under the navel, spaced 7 cm apart:

The differences in the electrical potentials of the electrodes were recorded, producing three signals:

Prior to sampling, the EHG signals were filtered using an analog three-pole Butterworth filter with the bandwidth from 0.0 Hz to 5.0 Hz. The fourth simultaneous signal was the analog signal corresponding to an external tocogram (TOCO signal) measuring mechanical uterine pressure acquired using a cardiotocograph (model HP8030) attached at the top of the fundus. The analog TOCO signal was lead to one of the amplifiers of the A/D converter (the value of 150 μV corresponds to a pressure of 1 Pa). The sampling frequency for the EHG and TOCO signals was 20 samples per second per signal, with 16-bit resolution.

The original EHG and TOCO signals of the records were further filtered using the four-pole band-pass digital Butterworth filter with cut-off frequencies at 0.08 Hz and 5.0 Hz applied bi-directionally. The records of the TPEHGT DS contain both, the original and filtered signals.

Files

Record names of the TPEHGT DS are of the following format: tpehgt_TXXX, where capital T refers to the type of record: p - Preterm, t - Term, and n - Non-pregnant, and XXX is the record number of that type.

The records of the dataset are in the WFDB format. Each records consists of three files, a header file (.hea) containing information regarding the record, the data file (.dat) containing original and filtered signal data, and the annotation file (.atr) containing annotations for the record.

The comment section in the header files (.hea) includes clinical information, such as:

If data was not available, the value is marked as None, if data was not applicable, the value is marked as N/A.

The signal data in the data files (.dat) are in the following order:

The annotations files (.atr) cantain manual annotations of contraction and dummy intervals:

Contact

For further information, please contact:

Franc Jager
Laboratory of Biomedical Computer Systems and Imaging
Faculty of Computer and Information Science
University of Ljubljana
Večna pot 113
1000 Ljubljana, Slovenia
email: franc.jager@fri.uni-lj.si

References

  1. Jager F, Libenšek S, Geršak K (2018). Characterization and automatic classification of preterm and term uterine records. PLoS ONE 13(8): e0202125. https://doi.org/10.1371/journal.pone.0202125.
Icon  Name                     Last modified      Size  Description
[PARENTDIR] Parent Directory - [   ] DOI 2018-08-15 13:44 19 [   ] MD5SUMS 2018-08-30 11:52 4.8K [   ] SHA1SUMS 2018-08-30 11:52 5.5K [   ] SHA256SUMS 2018-08-30 11:52 7.8K [   ] journal.pone.0202125.pdf 2018-08-29 11:42 23M [   ] tpehgt_n001.dat 2018-08-13 14:50 552K digitized signal(s) [   ] tpehgt_n002.dat 2018-08-13 14:50 551K digitized signal(s) [   ] tpehgt_n003.dat 2018-08-13 14:50 552K digitized signal(s) [   ] tpehgt_n004.dat 2018-08-13 14:50 554K digitized signal(s) [   ] tpehgt_n005.dat 2018-08-13 14:50 550K digitized signal(s) [   ] tpehgt_p001.dat 2018-08-13 14:50 563K digitized signal(s) [   ] tpehgt_p002.dat 2018-08-13 14:50 562K digitized signal(s) [   ] tpehgt_p003.dat 2018-08-13 14:50 563K digitized signal(s) [   ] tpehgt_p004.dat 2018-08-13 14:50 563K digitized signal(s) [   ] tpehgt_p005.dat 2018-08-13 14:50 563K digitized signal(s) [   ] tpehgt_p006.dat 2018-08-13 14:50 563K digitized signal(s) [   ] tpehgt_p007.dat 2018-08-13 14:50 563K digitized signal(s) [   ] tpehgt_p008.dat 2018-08-13 14:50 563K digitized signal(s) [   ] tpehgt_p009.dat 2018-08-13 14:50 562K digitized signal(s) [   ] tpehgt_p010.dat 2018-08-13 14:50 563K digitized signal(s) [   ] tpehgt_p011.dat 2018-08-13 14:50 562K digitized signal(s) [   ] tpehgt_p012.dat 2018-08-13 14:50 563K digitized signal(s) [   ] tpehgt_p013.dat 2018-08-13 14:50 562K digitized signal(s) [   ] tpehgt_t001.dat 2018-08-13 14:50 563K digitized signal(s) [   ] tpehgt_t002.dat 2018-08-13 14:50 563K digitized signal(s) [   ] tpehgt_t003.dat 2018-08-13 14:50 562K digitized signal(s) [   ] tpehgt_t004.dat 2018-08-13 14:50 562K digitized signal(s) [   ] tpehgt_t005.dat 2018-08-13 14:50 562K digitized signal(s) [   ] tpehgt_t006.dat 2018-08-13 14:50 563K digitized signal(s) [   ] tpehgt_t007.dat 2018-08-13 14:50 563K digitized signal(s) [   ] tpehgt_t008.dat 2018-08-13 14:50 562K digitized signal(s) [   ] tpehgt_t009.dat 2018-08-13 14:50 562K digitized signal(s) [   ] tpehgt_t010.dat 2018-08-13 14:50 562K digitized signal(s) [   ] tpehgt_t011.dat 2018-08-13 14:50 562K digitized signal(s) [   ] tpehgt_t012.dat 2018-08-13 14:50 563K digitized signal(s) [   ] tpehgt_t013.dat 2018-08-13 14:50 563K digitized signal(s) [   ] tpehgt_n001.hea 2018-08-13 14:50 684 header file [   ] tpehgt_n002.hea 2018-08-13 14:50 682 header file [   ] tpehgt_n003.hea 2018-08-13 14:50 682 header file [   ] tpehgt_n004.hea 2018-08-13 14:50 696 header file [   ] tpehgt_n005.hea 2018-08-13 14:50 692 header file [   ] tpehgt_p001.hea 2018-08-13 14:50 639 header file [   ] tpehgt_p002.hea 2018-08-13 14:50 627 header file [   ] tpehgt_p003.hea 2018-08-13 14:50 628 header file [   ] tpehgt_p004.hea 2018-08-13 14:50 638 header file [   ] tpehgt_p005.hea 2018-08-13 14:50 639 header file [   ] tpehgt_p006.hea 2018-08-13 14:50 631 header file [   ] tpehgt_p007.hea 2018-08-13 14:50 638 header file [   ] tpehgt_p008.hea 2018-08-13 14:50 641 header file [   ] tpehgt_p009.hea 2018-08-13 14:50 632 header file [   ] tpehgt_p010.hea 2018-08-13 14:50 639 header file [   ] tpehgt_p011.hea 2018-08-13 14:50 640 header file [   ] tpehgt_p012.hea 2018-08-13 14:50 639 header file [   ] tpehgt_p013.hea 2018-08-13 14:50 632 header file [   ] tpehgt_t001.hea 2018-08-13 14:50 630 header file [   ] tpehgt_t002.hea 2018-08-13 14:50 632 header file [   ] tpehgt_t003.hea 2018-08-13 14:50 635 header file [   ] tpehgt_t004.hea 2018-08-13 14:50 634 header file [   ] tpehgt_t005.hea 2018-08-13 14:50 628 header file [   ] tpehgt_t006.hea 2018-08-13 14:50 636 header file [   ] tpehgt_t007.hea 2018-08-13 14:50 632 header file [   ] tpehgt_t008.hea 2018-08-13 14:50 633 header file [   ] tpehgt_t009.hea 2018-08-13 14:50 632 header file [   ] tpehgt_t010.hea 2018-08-13 14:50 630 header file [   ] tpehgt_t011.hea 2018-08-13 14:50 627 header file [   ] tpehgt_t012.hea 2018-08-13 14:50 638 header file [   ] tpehgt_t013.hea 2018-08-13 14:50 629 header file [   ] ANNOTATORS 2018-08-13 14:50 58 list of annotators [   ] RECORDS 2018-08-13 14:50 372 list of record names [   ] tpehgt_n001.atr 2018-08-13 14:50 260 reference annotations [   ] tpehgt_n002.atr 2018-08-13 14:50 248 reference annotations [   ] tpehgt_n003.atr 2018-08-13 14:50 284 reference annotations [   ] tpehgt_n004.atr 2018-08-13 14:50 230 reference annotations [   ] tpehgt_n005.atr 2018-08-13 14:50 260 reference annotations [   ] tpehgt_p001.atr 2018-08-13 14:50 52 reference annotations [   ] tpehgt_p002.atr 2018-08-13 14:50 232 reference annotations [   ] tpehgt_p003.atr 2018-08-13 14:50 52 reference annotations [   ] tpehgt_p004.atr 2018-08-13 14:50 52 reference annotations [   ] tpehgt_p005.atr 2018-08-13 14:50 160 reference annotations [   ] tpehgt_p006.atr 2018-08-13 14:50 280 reference annotations [   ] tpehgt_p007.atr 2018-08-13 14:50 184 reference annotations [   ] tpehgt_p008.atr 2018-08-13 14:50 142 reference annotations [   ] tpehgt_p009.atr 2018-08-13 14:50 328 reference annotations [   ] tpehgt_p010.atr 2018-08-13 14:50 190 reference annotations [   ] tpehgt_p011.atr 2018-08-13 14:50 52 reference annotations [   ] tpehgt_p012.atr 2018-08-13 14:50 52 reference annotations [   ] tpehgt_p013.atr 2018-08-13 14:50 52 reference annotations [   ] tpehgt_t001.atr 2018-08-13 14:50 100 reference annotations [   ] tpehgt_t002.atr 2018-08-13 14:50 226 reference annotations [   ] tpehgt_t003.atr 2018-08-13 14:50 208 reference annotations [   ] tpehgt_t004.atr 2018-08-13 14:50 52 reference annotations [   ] tpehgt_t005.atr 2018-08-13 14:50 52 reference annotations [   ] tpehgt_t006.atr 2018-08-13 14:50 142 reference annotations [   ] tpehgt_t007.atr 2018-08-13 14:50 100 reference annotations [   ] tpehgt_t008.atr 2018-08-13 14:50 232 reference annotations [   ] tpehgt_t009.atr 2018-08-13 14:50 214 reference annotations [   ] tpehgt_t010.atr 2018-08-13 14:50 52 reference annotations [   ] tpehgt_t011.atr 2018-08-13 14:50 430 reference annotations [   ] tpehgt_t012.atr 2018-08-13 14:50 172 reference annotations [   ] tpehgt_t013.atr 2018-08-13 14:50 142 reference annotations

Questions and Comments

If you would like help understanding, using, or downloading content, please see our Frequently Asked Questions.

If you have any comments, feedback, or particular questions regarding this page, please send them to the webmaster.

Comments and issues can also be raised on PhysioNet's GitHub page.

Updated Friday, 28 October 2016 at 16:58 EDT

PhysioNet is supported by the National Institute of General Medical Sciences (NIGMS) and the National Institute of Biomedical Imaging and Bioengineering (NIBIB) under NIH grant number 2R01GM104987-09.