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. 2013 Jul 26;8(7):e70813. doi: 10.1371/journal.pone.0070813

Table 1. PSG recordings during nighttime and daytime sleep in the adapted and non-adapted group.

Non-Adapted Adapted
Nighttime (V1) Daytime (V2) Nighttime (V1) Daytime (V2) Visit Effect Group Interaction
Bedtime 23.06±0.16 9.55±0.21 22.86±0.38 9.96±0.19 n.s. n.s. n.s.
Waketime 7.06±0.11 17.52±0.23 6.85±0.41 17.98±0.18 n.s. n.s. n.s.
TST (min) 453.2±2.94 398.52±19.31 431.48±8.79 449.36±5.89 n.s. n.s. p = 0.005
SE (%) 0.93±0.01 0.83±0.04 0.9±0.02 0.93±0.01 n.s. n.s. p = 0.008
SOL (min) 4.24±1 4.13±1.06 9.28±1.15 5.61±0.89 P = 0.029 p = 0.025 n.s.
ROL (min) 64.37±9.23 48.17±7.65 68.64±3.84 66.37±1.89 n.s. n.s. n.s.
WASO (min) 23.94±3.32 71.52±19.1* 24.5±3.56 15.28±2.49* n.s. n.s. p = 0.016
WASO (%) 5.31±0.76 15.02±4.50* 5.69±0.92 4.83±0.57* n.s. n.s. p = 0.030
S1 (min) 3.94±0.93 6.57±1.45 4.47±0.99 8.26±2.44 n.s. n.s. n.s.
S1 (%) 0.87±0.18 1.71±0.4 1.04±0.24 1.87±0.56 p = 0.034 n.s. n.s.
S2 (min) 216.19±16.6 198.89±13.36 199.05±22.78 206.79±19.55 n.s. n.s. n.s.
S2 (%) 48.78±3.51 50.1±3.31 46.04±4.87 46.18±4.59 n.s. n.s. n.s.
SWS (min) 117.04±14.45 87±8.39 117.79±18.97 117.88±16.08 n.s. n.s. n.s.
SWS (%) 25.57±2.81 21.82±1.83 27.29±4.23 26.1±3.39 n.s. n.s. n.s.
REMS (min) 116.04±5.84 106.06±11.78 106.1±9.57 116.43±8.33 n.s. n.s. n.s.
REMS (%) 24.79±1.31 26.37±2.3 24.59±2.28 25.86±1.7 n.s. n.s. n.s.
NREMS (min) 333.23±4.44 298.31±7.56 316.83±12.33 324.67±6.36 n.s. n.s. p = 0.020
NREMS (%) 74.35±1.29 71.92±2.22 73.33±1.87 72.28±1.33 n.s. n.s. n.s.

Details of the PSG recording values during the nighttime (visit 1 [V1]) and daytime (visit 2 [V2]) sleep periods in the adapted and non-adapted groups. TST: total sleep time; SE: sleep efficiency; SOL: sleep onset latency; REMS: rapid eye movement sleep; ROL: REMS latency; NREMS: non-REM sleep; WASO: wake after sleep onset; S1: stage 1 sleep; S2: stage 2 sleep; SWS: slow wave sleep. The PSG measurements were compared using a linear mixed effect model with visit and adaptation group as factors and the results are reported in the last three columns.

indicate significant differences (p<0.05) between laboratory visits (thus between nighttime and daytime sleep).

Asterisks (*) indicate significant differences (p<0.05) between adaptation groups. All values are means ± SEM.