Table 3.
Sleep duration and sleep related characteristics in the study population
| Age groups (yrs) | All subjects | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 to 3 | 3 to 5 | 5 to 7 | 7 to 10 | 10 to 14 | ||||||||
| Subjects | 523 | 100.0 | 429 | 100.0 | 425 | 100.0 | 355 | 100.0 | 298 | 100.0 | 2030 | 100.0 |
| Med | IQR | Med | IQR | Med | IQR | Med | IQR | Med | IQR | Med | IQR | |
| Nocturnal sleep (hrs) | 9.50 | 1.25 | 9.75 | 1.25 | 9.75 | 1.00 | 9.50 | 0.75 | 8.88 | 1.25 | 9.50 | 1.00 |
| Daytime sleep (hrs) | 2.00 | 1.00 | 0.75 | 1.50 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 1.50 |
| Total sleep (hrs) | 11.50 | 1.50 | 10.50 | 1.00 | 9.75 | 1.00 | 9.50 | 1.00 | 9.00 | 1.25 | 10.00 | 1.75 |
| N | % | N | % | N | % | N | % | N | % | N | % | |
| Sleep duration according with Recommendationsa | ||||||||||||
| Under | 171 | 32,7 | 104 | 24.2 | 141 | 33.2 | 82 | 23.1 | 144 | 48.3 | 642 | 31.6 |
| Recommended | 346 | 66.2 | 319 | 74.4 | 272 | 64.0 | 272 | 76.6 | 149 | 50.0 | 1358 | 66.9 |
| Over | 6 | 1.1 | 6 | 1.4 | 12 | 2.8 | 1 | 0.3 | 5 | 1.7 | 30 | 1.5 |
| Awakenings | ||||||||||||
| 0 | 170 | 32.5 | 204 | 47.6 | 294 | 69.2 | 272 | 76.6 | 223 | 74.8 | 1163 | 57.3 |
| 1 | 156 | 29.8 | 144 | 33.6 | 96 | 22.6 | 60 | 16.9 | 52 | 17.4 | 508 | 25.0 |
| 2 | 120 | 22.9 | 46 | 10.7 | 31 | 7.3 | 14 | 3.9 | 18 | 6.0 | 229 | 11.3 |
| 3 | 39 | 7.5 | 27 | 6.3 | 3 | 0.7 | 6 | 1.7 | 4 | 1.3 | 79 | 3.9 |
| ≥4 | 38 | 7.3 | 8 | 1.8 | 1 | 0.2 | 2 | 0.6 | 1 | 0.3 | 50 | 2.4 |
| Unknown | 0 | 0.0 | 0 | 0.0 | 0 | 0.0 | 1 | 0.3 | 0 | 0.0 | 1 | 0.0 |
| Owns a room | ||||||||||||
| Yes | 212 | 40.5 | 234 | 54.5 | 211 | 49.6 | 181 | 51.0 | 164 | 55.0 | 1002 | 49.4 |
| No | 209 | 40.0 | 90 | 21.0 | 48 | 11.3 | 27 | 7.6 | 7 | 2.3 | 381 | 18.8 |
| Shared | 97 | 18.5 | 100 | 23.3 | 166 | 39.1 | 146 | 41.1 | 127 | 42.6 | 636 | 31.3 |
| Unknown | 5 | 1.0 | 5 | 1.2 | 0 | 0.0 | 1 | 0.3 | 0 | 0.0 | 11 | 0.5 |
| Has TV in bedroom | 131 | 25.0 | 155 | 36.1 | 182 | 42.8 | 184 | 51.8 | 158 | 53.0 | 810 | 39.9 |
| Display devices use | 207 | 39.6 | 281 | 65.5 | 295 | 69.4 | 269 | 75.8 | 237 | 79.5 | 1289 | 63.5 |
| Reads before sleep | 189 | 36.1 | 208 | 48.5 | 183 | 43.1 | 120 | 33.8 | 93 | 31.2 | 793 | 39.1 |
| Where falls asleep | ||||||||||||
| Own bed | 245 | 46.8 | 218 | 50.8 | 264 | 62.1 | 255 | 71.8 | 260 | 87.2 | 1242 | 61.2 |
| Parents’ bed | 203 | 38.8 | 157 | 36.6 | 109 | 25.6 | 70 | 19.7 | 23 | 7.7 | 562 | 27.7 |
| Other room | 67 | 12.8 | 48 | 11.2 | 49 | 11.5 | 28 | 7.9 | 15 | 5.0 | 207 | 10.2 |
| Outside home | 5 | 1.0 | 5 | 1.2 | 2 | 0.5 | 2 | 0.6 | 0 | 0.0 | 14 | 0.7 |
| Unknown | 3 | 0.6 | 1 | 0.2 | 1 | 0.2 | 0 | 0.0 | 0 | 0.0 | 5 | 0.2 |
| Where sleeps | ||||||||||||
| Own bed | 363 | 69.4 | 284 | 66.2 | 333 | 78.4 | 289 | 81.4 | 278 | 93.3 | 1547 | 76.2 |
| Parents’ bed | 157 | 30.0 | 137 | 31.9 | 84 | 19.8 | 61 | 17.2 | 17 | 5.7 | 456 | 22.5 |
| Other room | 2 | 0.4 | 5 | 1.2 | 6 | 1.4 | 3 | 0.8 | 2 | 0.7 | 18 | 0.9 |
| Outside home | 0 | 0.0 | 2 | 0.5 | 1 | 0.2 | 2 | 0.6 | 0 | 0.0 | 5 | 0.2 |
| Unknown | 1 | 0.2 | 1 | 0.2 | 1 | 0.2 | 0 | 0.0 | 1 | 0.3 | 4 | 0.2 |
aNSF recommendations (ref. [15])