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. Author manuscript; available in PMC: 2013 Aug 20.
Published in final edited form as: Physiol Behav. 2012 May 31;107(1):40–44. doi: 10.1016/j.physbeh.2012.05.021

Table 2.

Relationship between nap frequency and nocturnal sleep

Mean (SD) rnum pnum rmin pnum
Bedtime 01:14 (0:55) 0.289 0.16 0.294 0.27
Wake Time 08:44 (0:53) 0.221 0.29 0.289 0.28
TST (min) 366.6 (40.0) −0.088 0.68 −0.071 0.79
Sleep Latency (min) 14.6 (7.6) −0.036 0.86 0.175 0.52
WASO (min) 64.7 (19.0) 0.223 0.29 0.044 0.87
Sleep Efficiency (min) 83.2 (4.19) −0.237 0.25 −0.053 0.84

Statistics report Pearson’s r and p-values for correlations between number of prior naps (rnum, pnum), total minutes of prior naps (rmin, pmin) and nocturnal sleep variables. TST, total sleep time; WASO, wake after sleep onset.