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. 2014 Sep 2;21(1):23–31. doi: 10.1111/cns.12319

Table 2.

Distribution and duration of daytime sleep

Nap I (n = 21) II (n = 19) III (n = 19) Test statistic
% M ± SD (min) % M ± SD (min) % M ± SD (min) P‐value
Morning 2 162 ± 187 5 140 ± 9 1.6 64 ± 1 H(2,10) = 3.3, P = 0.20
Noon 70 95 ± 35 68 95 ± 44 73 101 ± 37 H(2,35) = 4.1, P = 0.13
Afternoon 24 100 ± 76 13 99 ± 53 12.7 77 ± 47 H(2,61) = 1.4, P = 0.49
Late Afternoon 5 54 ± 31 14 118 ± 114 12.7 65 ± 50 H(2,37) = 1.7, P = 0.43

I, first recording period; II, second recording period; III, third recording period; M, mean; SD, standard deviation.