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. 2021 May 26:zsab080. doi: 10.1093/sleep/zsab080

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© Sleep Research Society 2021. Published by Oxford University Press on behalf of the Sleep Research Society. All rights reserved. For permissions, please email: journals.permissions@oup.com

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Figure 2. — “Survey wave” × “Screen exposure” interaction for bedtime and rise time (hh:mm).

Mean ± standard error of the bedtime (A) and rise time (B) at the two assessments (Survey wave 1, Survey wave 2) for participants who declared an increase (+), preservation (=), or reduction (–) of the electronic device usage duration before falling asleep. Bonferroni post hoc results are reported with asterisks (** p < 0.01, *** p < 0.001).