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. 2022 Mar 10;45(6):zsac059. doi: 10.1093/sleep/zsac059

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© Sleep Research Society 2022. Published by Oxford University Press on behalf of the Sleep Research Society.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.

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Figure 6. — Changes in ORP-architecture (ORP = odds ratio product) with increasing obstructive apnea (OSA) severity (A), different types of insomnia (B), and in participants with insomnia plus OSA (C). AHI, apnea hypopnea index; NSD, normal sleep duration; SSD, short sleep duration. Abscissa values are the ORP deciles, with decile 1 representing the deepest sleep (0.00–0.25), and decile 10 representing full wakefulness (ORP > 2.25). The different groups at each decile were compared by one-way analysis of variance (ANOVA). If p < .05, each group within the same decile was compared to the first group using the independent t-test with appropriate Bonferroni correction. Significant differences from the first group are indicated by letters: “a”, p ≤ .05; “b”, p ≤ .01; “c”, p ≤ .001; “d”, p ≤ .0001.