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. 2022 Mar 11;13:785079. doi: 10.3389/fpsyt.2022.785079

Table 3.

Descriptive and inferential statistics for daytime sleepiness, evening sleepiness, and sustained evening attention, as well as mood in chronotype subgroups.

Characteristics Slight late type (N = 8) Moderate late type (N = 4) Extreme late type (N = 6) Statistics
M SD M SD M SD F p η2
Daytime sleepiness 15.5 3.46 15.5 2.65 15.5 3.89 0.00 1.000 0.000
Evening sleepiness
    3 h before BT 4.75 1.83 4.75 1.26 5.83 1.17 1.00 0.390 0.118
    2 h before BT 5.25 1.58 5.75 0.50 6.83 1.17 2.60 0.107 0.257
    1 h before BT 5.50 1.41 6.25 1.50 7.83 0.75 6.00 0.012 0.444
    0 h before BT 6.88 1.36 7.50 1.29 8.00 0.89 1.51 0.253 0.168
Evening attention
    RT 3 h before BT 309.63 44.23 319.75 35.82 317.83 26.51 0.13 0.879 0.017
    RT 2 h before BT 304.25 47.48 336.25 22.59 323.50 42.13 0.87 0.440 0.104
    RT 1 h before BT 310.38 43.13 356.25 43.87 326.00 35.12 1.69 0.219 0.184
    RT 0 h before BT 353.75 41.31 353.75 41.31 327.83 44.97 0.731 0.498 0.089
    Error % 3 h before BT 2.42 1.45 1.66 0.27 2.19 0.78 0.631 0.546 0.078
    Error % 2 h before BT 1.45 0.30 1.94 0.21 1.99 0.50 4.56 0.028 0.378
    Error % 1 h before BT 1.87 0.61 4.38 2.60 2.57 0.79 4.88 0.23 0.394
    Error % 0 h before BT 1.68 0.63 2.79 0.57 2.17 0.90 3.21 0.069 0.300
Mood
    Depression 7.00 5.24 9.00 3.83 13.67 5.85 2.85 0.089 0.151
    Anxiety 5.75 2.71 6.00 6.73 12.00 5.66 3.29 0.066 0.305
    Stress 7.00 4.00 8.50 5.26 13.00 9.78 1.42 0.273 0.159

M, mean; SD, standard deviation; BT, bedtime; RT, reaction time Go/NoGo task; error %, commission error percentage of Go/NoGo task; higher sleepiness scores reflect higher sleepiness, sustained evening attention, larger RT and error % reflect lower attention; Mood, higher scores represent higher prevalence of mood disturbances.