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. Author manuscript; available in PMC: 2013 Oct 1.
Published in final edited form as: Biol Psychol. 2012 Jul 31;91(2):283–291. doi: 10.1016/j.biopsycho.2012.06.010

Table 1.

Number of participants classified by time awake (TA) and time of day (TOD)

Morning Afternoon Evening Total TA
Just Awake (<= 3 hours) 39 47 na 86
Awake 4–6 hours 22 88 28 138
Awake 7+ hours na 55 160 215
Total TOD 61 190 188
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