Three-channel surface electrogastrogram (EGG) dataset recorded during fasting and post-prandial states in healthy individuals

This repository contains Electrogastrography signals termed Electrogastrograms (EGG) recorded with surface Ag/AgCl electrodes placed over stomach and pre-processed in 20 healthy individuals (8 Females and 12 Males). The method for EGG recording and pre-processing together with subjects' data can be found in Popović et al. 2019.

For each subject, EGG was recorded from three locations before (fasting state) and after (postprandial state) a commercial oat meal (274 kcal). Two 20 minutes recordings (files) are obtained for each subject - fasting and postprandial.

Naming convention for files: subjects ID _ type of recording (fasting / postprandial).

Sample rate was set at 2 Hz and A/D card had 16 bits resolution. Gain of the amplifier was set at 1000. Overall, file size is 7200 samples (2400 samples for each channel). File structure: 1^st column - CH1 (recordings from channel 1), 2^nd column - CH2, and 3^rd column - CH3. All signals were filtered with 3^rd order band-pass Butterworth filter with cut-off frequencies of 0.03 Hz and 0.25 Hz. In order to avoid phase distortion, zero-phase digital filtering was performed in Matlab R2013a by filtfilt() function.

For convenient test download and appropriate preview, we provided all signals in .zip and sample signal for ID1 in .txt form.

If you find these signals useful for your own research or teaching class, please cite both relevant paper and dataset as:

1. Popović, N.B., Miljković, N. and Popović, M.B., 2019. Simple gastric motility assessment method with a single-channel electrogastrogram. Biomedical Engineering/Biomedizinische Technik, 64(2), pp.177-185, doi: 10.1515/bmt-2017-0218.

2. Popović, N.B., Miljković, N. and Popović, M.B., 2020. Three-channel surface electrogastrogram (EGG) dataset recorded during fasting and post-prandial states in healthy individuals (Version 1) [Data set]. Zenodo, doi: 10.5281/zenodo.3730618.