Table 3.
Sleep duration and sleep latency in the different age groups.
| 1–3 Years | 4–5 Years | 6–12 Years | 13–18 Years | P | Total | |
|---|---|---|---|---|---|---|
| Night sleep duration weekday | ||||||
| < 7 h | 86 (6.8%; 5.4–8.2%) | 20 (2.2%; 1.3–3.2%) | 29 (1.6%; 1.0–2.2%) | 37 (12.0%; 8.4–15.6%) | < .001 | 172 (4.0%; 3.4–4.6%) |
| 7–8 h | 176 (13.9%; 12.0–15.9%) | 132 (14.8%; 12.4–17.1%) | 313 (17.1%; 15.4–18.9%) | 124 (40.1%; 34.7–45.6%) | < .001 | 745 (17.4%; 16.2–18.5%) |
| 8–9 h | 400 (31.7%; 29.1–34.3%) | 305 (34.1%; 31.0–37.2%) | 799 (43.8%; 41.5–46.0%) | 121 (39.2%; 33.7–44.6%) | < .001 | 1,625 (37.9%; 36.4–39.3%) |
| 9–10 h | 406 (32.2%; 29.6–34.7%) | 318 (35.6%; 32.4–38.7%) | 568 (31.1%; 29.0–33.2%) | 25 (8.1%; 5.1–11.1%) | < .001 | 1,317 (30.7%; 29.3–32.1%) |
| > 10 h | 194 (15.4%; 13.4–17.4%) | 119 (13.3%; 11.1–15.5%) | 117 (6.4%; 5.3–7.5%) | 2 (0.6%; −0.2–1.5%) | < .001 | 432 (10.1%; 9.2–11.0%) |
| Night sleep duration weekend | ||||||
| < 7 h | 74 (5.9%; 4.6–7.1%) | 13 (1.5%; 0.7–2.3%) | 14 (0.8%; 0.4–1.2%) | 8 (2.6%; 0.8–4.4%) | < .001 | 109 (2.6%; 2.1–3.0%) |
| 7–8 h | 166 (13.1%; 11.3–15.0%) | 99 (11.2%; 9.1–13.2%) | 156 (8.6%; 7.3–9.9%) | 43 (14.0%; 10.1–17.8%) | < .001 | 464 (10.9%; 9.9–11.8%) |
| 8–9 h | 393 (31.1%; 28.5–33.6%) | 269 (30.3%; 27.3–33.4%) | 680 (37.5%; 35.3–39.7%) | 117 (38.0%; 32.6–43.4%) | < .001 | 1,459 (34.2%; 32.7–35.6%) |
| 9–10 h | 414 (32.8%; 30.2–35.3%) | 330 (37.2%; 34.0–40.4%) | 721 (39.8%; 37.5–42.0%) | 94 (30.5%; 25.4–35.7%) | < .001 | 1,559 (36.5%; 35.0–37.9%) |
| > 10 h | 217 (17.2%; 15.1–19.2%) | 176 (19.8%; 17.2–22.5%) | 242 (13.3%; 11.8–14.9%) | 46 (14.9%; 11.0–18.9%) | < .001 | 681 (15.9%; 14.8–17.0%) |
| 24-Hour weekday sleep | ||||||
| < 7 h | 11 (0.9%; 0.4–1.4%) | 10 (1.2%; 0.4–1.9%) | 28 (1.6%; 1.0–2.2%) | 30 (9.9%; 6.6–13.3%) | < .001 | 79 (1.9%; 1.5–2.3%) |
| 7–8 h | 50 (4.0%; 2.9–5.1%) | 68 (7.9%; 6.1–9.7%) | 299 (16.8%; 15.1–18.5%) | 119 (39.4%; 33.9–44.9%) | < .001 | 536 (12.8%; 11.8–13.8%) |
| 8–9 h | 101 (8.2%; 6.6–9.7%) | 223 (25.8%; 22.9–28.7%) | 768 (43.2%; 40.9–45.5%) | 124 (41.1%; 35.5–46.6%) | < .001 | 1,216 (29.1%; 27.7–30.5%) |
| 9–10 h | 232 (18.8%; 16.6–21.0%) | 317 (36.6%; 33.4–39.9%) | 557 (31.3%; 29.2–33.5%) | 26 (8.6%; 5.4–11.8%) | < .001 | 1,132 (27.1%; 25.7–28.4%) |
| 10–11 h | 382 (30.9%; 28.4–33.5%) | 170 (19.7%; 17.0–22.3%) | 114 (6.4%; 5.3–7.5%) | 2 (0.7%; −0.3–1.6%) | < .001 | 668 (16.0%; 14.9–17.1%) |
| 11–12 h | 290 (23.5%; 21.1–25.8%) | 60 (6.9%; 5.2–8.6%) | 9 (0.5%; 0.2–0.8%) | 1 (0.3%; −0.3–1.0%) | < .001 | 360 (8.6%; 7.8–9.5%) |
| > 12 h | 169 (13.7%; 11.8–15.6%) | 17 (2.0%; 1.0–2.9%) | 4 (0.2%; 0.0–0.4%) | 0 (0.0%; 0.0–0.0%) | < .001 | 190 (4.5%; 3.9–5.2%) |
| 24-Hour weekend sleep | ||||||
| < 7 h | 9 (0.7%; 0.3–1.2%) | 5 (0.6%; 0.1–1.1%) | 13 (0.7%; 0.3–0.3%) | 7 (2.3%; 0.6–4.0%) | .026 | 34 (0.8%; 0.5–1.1%) |
| 7–8 h | 43 (3.5%; 2.5–4.5%) | 58 (6.8%; 5.1–8.4%) | 149 (8.4%; 7.1–7.1%) | 40 (13.3%; 9.5–17.1%) | < .001 | 290 (7.0%; 6.2–7.7%) |
| 8–9 h | 100 (8.1%; 6.6–9.6%) | 190 (22.1%; 19.4–24.9%) | 647 (36.6%; 34.4–34.4%) | 112 (37.2%; 31.7–42.7%) | < .001 | 1,049 (25.2%; 23.9–26.5%) |
| 9–10 h | 208 (16.8%; 14.7–18.9%) | 279 (32.5%; 29.4–35.7%) | 710 (40.2%; 37.9–37.9%) | 93 (30.9%; 25.7–36.1%) | < .001 | 1,290 (31.0%; 29.6–32.4%) |
| 10–11 h | 393 (31.8%; 29.2–34.4%) | 219 (25.5%; 22.6–28.4%) | 223 (12.6%; 11.1–11.1%) | 42 (14.0%; 10.0–17.9%) | < .001 | 877 (21.1%; 19.8–22.3%) |
| 11–12 h | 305 (24.7%; 22.3–27.1%) | 90 (10.5%; 8.4–12.5%) | 19 (1.1%; 0.6–0.6%) | 5 (1.7%; 0.2–3.1%) | < .001 | 419 (10.1%; 9.2–11.0%) |
| > 12 h | 179 (14.5%; 12.5–16.4%) | 17 (2.0%; 1.0–2.9%) | 5 (0.3%; 0.0–0.0%) | 2 (0.7%; −0.3–1.6%) | < .001 | 203 (4.9%; 4.2–5.5%) |
| Sleep latency weekday | ||||||
| 5–15 min | 469 (37.1%; 34.5–39.8%) | 438 (49.0%; 45.7–52.3%) | 1,096 (59.8%; 57.6–62.1%) | 162 (52.6%; 47.0–58.2%) | < .001 | 2,165 (50.4%; 48.9–51.9%) |
| 15–30 min | 598 (47.3%; 44.6–50.1%) | 371 (41.5%; 38.3–44.7%) | 613 (33.5%; 31.3–35.6%) | 104 (33.8%; 28.5–39.0%) | < .001 | 1,686 (39.2%; 37.8–40.7%) |
| 30–60 min | 179 (14.2%; 12.2–16.1%) | 80 (8.9%; 7.1–10.8%) | 113 (6.2%; 5.1–7.3%) | 38 (12.3%; 8.7–16.0%) | < .001 | 410 (9.5%; 8.7–10.4%) |
| > 60 min | 17 (1.3%; 0.7–2.0%) | 5 (0.6%; 0.1–1.0%) | 10 (0.5%; 0.2–0.9%) | 4 (1.3%; 0.0–2.6%) | .059 | 36 (0.8%; 0.6–1.1%) |
| Sleep latency weekend | ||||||
| 5–15 min | 428 (33.9%; 31.3–36.5%) | 404 (45.2%; 41.9–48.5%) | 1,044 (57.2%; 54.9–59.4%) | 153 (49.7%; 44.1–55.3%) | < .001 | 2,029 (47.3%; 45.8–48.8%) |
| 15–30 min | 625 (49.5%; 46.7–52.2%) | 381 (42.6%; 39.4–45.9%) | 608 (33.3%; 31.1–35.5%) | 105 (34.1%; 28.8–39.4%) | < .001 | 1,719 (40.1%; 38.6–41.5%) |
| 30–60 min | 190 (15.0%; 13.1–17.0%) | 105 (11.7%; 9.6–13.9%) | 160 (8.8%; 7.5–10.1%) | 43 (14.0%; 10.1–17.8%) | < .001 | 498 (11.6%; 10.6–12.6%) |
| > 60 min | 20 (1.6%; 0.9–2.3%) | 4 (0.4%; 0.0–0.9%) | 14 (0.8%; 0.4–1.2%) | 7 (2.3%; 0.6–3.9%) | .006 | 45 (1.0%; 0.7–1.4%) |
Values are presented as n (%; 95% confidence interval).