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. 2022 Jun 8;19(12):7032. doi: 10.3390/ijerph19127032

Figure 1.

Figure 1

Bar plots representing the significant differences in terms of sleep patterns and academic stress across school grade groups. Specifically, the figure reports differences across school grades in terms of: (A) weekday bedtime; (B) weekday wake up time; (C) weekday total sleep time; (D) weekend bedtime; (E) weekend oversleep; (F) sleep/wake behaviour problems; (G) circadian preference; and (H) stress derived from frustrations (* p < 0.017; ** p< 0.01; *** p< 0.001; **** p< 0.0001).