Table 2.
Students’ sleep, depression, and cognitive measures depending on sex.
| Measure | Girls 1 | Boys 1 | W | p | Effect Size r |
|---|---|---|---|---|---|
| Daytime sleepiness | 8.32 (4.06) | 7.18 (4.41) | 8543.5 | 0.029 | −0.14 |
| Sleep quality 2 | 5.57 (8.08) | 4.16 (2.59) | 8355.0 | 0.037 | −0.13 |
| Dysthymia-state | 24.21 (28.67) | 32.32 (33.53) | 6341.0 | 0.093 | −0.11 |
| Euthymia-state | 74.91 (24.89) | 85.42 (18.30) | 4991.5 | <0.001 | −0.26 |
| State total score | 65.20 (17.43) | 77.39 (17.44) | 3918.5 | <0.001 | −0.39 |
| Dysthymia-trait | 20.15 (26.52) | 23.56 (29.46) | 7028.0 | 0.808 | −0.02 |
| Euthymia-trait | 71.22 (27.17) | 82.06 (21.65) | 5331.0 | <0.001 | −0.22 |
| Trait total score | 58.74 (21.38) | 68.26 (18.99) | 5216.5 | <0.001 | −0.23 |
| Inductive reasoning | 39.67 (24.88) | 35.70 (27.59) | 7668.5 | 0.136 | −0.10 |
| Reading comprehension | 36.62 (23.52) | 35.70 (25.46) | 7102.0 | 0.602 | −0.03 |
| Problem-solving | 39.09 (24.51) | 40.03 (25.00) | 6333.0 | 0.723 | −0.02 |
| Number and calculation | 43.77 (26.88) | 38.39 (25.95) | 7416.5 | 0.122 | −0.10 |
1 Mean (SD). 2 Higher score means lower sleep quality.