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. 2019 Nov 14;9:16824. doi: 10.1038/s41598-019-53115-3

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© The Author(s) 2019

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Sleep metrics: Bland-Altman plots for four different sleep metrics, comparing manual PSG scoring and automatic earEEG scoring (leave-one-subject-out). In each plot is included the mean (full line) as well as the mean ±1.96 standard deviations. Only epochs that could be scored by the sleep technician, as well as by the algorithm (meaning it had functional electrodes in both ears) were included - the rest were marked as ‘unscored’ in both hypnograms.