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. 2023 Feb 17;46(5):zsad033. doi: 10.1093/sleep/zsad033

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© Sleep Research Society 2023. 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 1. — The saliva DLMO (A) and plasma DLMO (B) (mean ± SD) of groups of healthy participants from 121 published studies. The open squares are the n-weighted means ± SD of the 10-year age groups. Note that in some cases, no SD was available.