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. Author manuscript; available in PMC: 2023 May 1.
Published in final edited form as: Sleep Med. 2021 Nov 11;93:90–99. doi: 10.1016/j.sleep.2021.11.004

Figure 1.

Figure 1.

Nonlinear effect for standardized (a) sleep environmental disruptions2 (b) presleep worries2 and (c) presleep arousal2 predicting sleepiness. Points were plotted at +/− 1 SDs for predictors. 95% confidence intervals are presented in gray.

Note: −1-SD environmental disruptions and presleep worries is approximately 0 and +1-SD is approximately 5 and 3, respectively.