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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 4. — (A) Changes in ORP-architecture with age (A), gender (B), and body mass index (BMI, C) in participants with “No OSA/Insomnia” in the Sleep Heart Health Study. Abscissa values are the odds ratio product (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 (youngest in the case of age) 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. CSI, Cummulative Sleep Index.