|
| both genders | boys | girls | gender difference | |||
| n | % | n | % | n | % | ||
| unspecified sleep problems | 3327/17,102 | 19.5% | 1577/8778 | 18.0% | 1750/8324 | 21.0% | χ² = 25.501, p = 0.000 |
| difficulties falling asleep | 2221/17,102 | 13.0% | 1052/8778 | 12.0% | 1169/8323 | 14.0% | χ² = 16.057, p = 0.000 |
| difficulties sleeping through the night | 1509/17,102 | 8.8% | 688/8778 | 7.8% | 821/8324 | 9.9% | χ² = 21.783, p = 0.000 |
| difficulties falling asleep and difficulties sleeping through the night | 511/17,101 | 3.0% | 213/8778 | 2.4% | 298/8323 | 3.6% | χ² = 19.624, p = 0.000 |