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. 2019 Aug 11;24(1):387–398. doi: 10.1007/s11325-019-01904-5

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© The Author(s) 2019

Open Access This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided 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.

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Fig. 6 — a Bland-Altman plot for the effect of mean AHI on the difference in AHI between WatchPAT and PSG. b Bland-Altman plot for the effect of mean AHIc on the difference in AHI between WatchPAT and PSG. Bland-Altman plots for the effect of mean AHI (a) or mean central AHI, (b) on the differences between WatchPAT and PSG. As can be seen, on the average across various severities of AHI, PSG scored 0.77 less events per hour of sleep compared with WP, while for AHIc PSG scored 1.7 events greater than WP per hour of sleep. In both cases, there was no substantial effect of the average AHI severity on the difference between the methods