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. Author manuscript; available in PMC: 2017 Sep 5.
Published in final edited form as: J Biol Rhythms. 2017 Jan 16;32(1):64–74. doi: 10.1177/0748730416685451

Figure 1.

Figure 1

Some standard measures of sleep-wake architecture showed changes with age in early childhood. There was no age-related change in mean total sleep following 13 h of prior wakefulness (A) or mean durations of NREM/REM sleep cycles (B), but NREM sleep episodes (C) increased with age; mean durations of REM sleep episodes showed no age-related change (D). Average changes between ages for each measure except total sleep were positive, suggesting trends for age-related increases (E, F, G, H, respectively). Bars indicate the 95 percent confidence interval of the means (A-D) and paired differences (E-H).