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. Author manuscript; available in PMC: 2019 Jan 2.
Published in final edited form as: Sleep Med. 2017 Feb 10;33:103–108. doi: 10.1016/j.sleep.2016.12.028

Table 3.

Sleep parameter mean values for both sexes on school days and non-school days.

Sleep parameters Boys (n = 114) Girls (n = 167) All (n = 281)
SchD NSchD p SchD NchD p SchD NSchD p
Sleep duration
 TRT (hours) 7.01 ± 0.90 8.36 ± 1.45 <0.001 7.07 ± 0.78 8.42 ± 1.06 <0.001 7.05 ± 0.83 8.40 ± 1.23 <0.001
 TST (hours) 6.16 ± 0.82 7.25 ± 1.29 <0.001 6.21 ± 0.69 8.42 ± 1.06 <0.001 6.20 ± 0.74 7.33 ± 1.10 <0.001
Sleep quality
 SLE (%) 88.0 ± 4.4 86.8 ± 4.2 0.01 87.9 ± 4.4 87.9 ± 5.1 0.837 87.9 ± 4.4 87.4 ± 4.7 0.038
 SOL (minutes) 1.6 ± 1.0 1.6 ± 1.1 0.790 1.5 ± 1.0 1.6 ± 1.2 0.767 1.6 ± 1.0 1.6 ± 1.2 <0.001
 WASO (minutes) 50.0 ± 21.1 66.3 ± 24.8 <0.001 50.2 ± 21.4 60.3 ± 28.4 <0.001 50.1 ± 21.2 62.7 ± 27.1 <0.001
 NOA (count) 18.3 ± 6.3 23.4 ± 9.4 <0.001 18.5 ± 4.8 22.7 ± 7.8 <0.001 18.4 ± 5.5 23.0 ± 7.8 <0.001
 SFI (%) 19.7 ± 5.8 22.3 ± 6.7 <0.001 20.1 ± 4.2 20.7 ± 7.5 0.175 19.9 ± 6.1 21.3 ± 7.2 0.846

SchD, school days; NSchD, non-school days; TRT, total rest time; TST, total sleep time; SLE, sleep efficiency; SOL, sleep onset latency; WASO, wake time after sleep onset; NOA, number of awakenings during rest period; SFI, Sleep Fragmentation Index.