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. Author manuscript; available in PMC: 2020 Aug 1.
Published in final edited form as: Sleep Med. 2019 Apr 19;60:202–210. doi: 10.1016/j.sleep.2019.04.007

Table 2.

Correlations between Waves by Sleep Dimension

Weekday Sleep Weekend Sleep Nightly Variability
Wave 1 Wave 2 Wave 1 Wave 2 Wave 1 Wave 2
Duration Duration
Wave 2 .24** Wave 2 .32*** Wave 2 .20**
Wave 3 .17 .32*** Wave 3 .00 .22* Wave 3 −.05 .11
Efficiency Efficiency
Wave 2 34*** Wave 2 .40***
Wave 3 .15 39*** Wave 3 −.03 .16
Latency Latency
Wave 2 .26*** Wave 2 31***
Wave 3 .26** .34*** Wave 3 −.03 .14

Note.

*

p < .05,

**

p < .01,

***

p < .001.

Significant correlations in all sleep parameters between the first two waves of the study. Fewer significant correlations between the second and third waves of the study. Only one significant correlation between the first and third waves of the study.