Demographic Characteristics for 4525 Children by Duration of Sleep With Adjusted Average Sleep Durations
| . | Hours of Self-reported Sleep on a School Nighta . | . | . | ||||
|---|---|---|---|---|---|---|---|
| <9 h . | 9–9.9 h . | 10–10.9 h . | 11–11.9 h . | ≥12 h . | Adjusted Mean Sleep Hours (95 % CI) . | Pb . | |
| N | 279 (6.2%) | 841 (18.6%) | 2014 (44.5%) | 1166 (25.8%) | 225 (5%) | ||
| Average age, y (SD) | 10.0 (0.4) | 10.0 (0.4) | 10.0 (0.4) | 9.0 (0.4) | 9.8 (0.4) | 10.3 (10.2 to 10.3) | .05 |
| Boys | 180 (8.2) | 431 (19.7) | 963 (44.1) | 501 (22.9) | 110 (5.0) | 10.2 (10.1 to 10.2) | — |
| Girls | 99 (4.2) | 410 (17.5) | 1051 (44.9) | 665 (28.4) | 115 (4.9) | 10.4 (10.3 to 10.4) | <.0001 |
| Ethnic group | |||||||
| White European | 43 (3.9) | 179 (16.4) | 493 (45.3) | 316 (29.0) | 58 (5.3) | 10.4 (10.3 to 10.5) | <.0001 |
| Black African-Caribbean | 87 (7.6) | 245 (21.4) | 508 (44.4) | 252 (22.0) | 51 (4.5) | 10.1 (10.1 to 10.2) | — |
| South Asian | 89 (7.2) | 217 (17.5) | 551 (44.4) | 335 (27.0) | 50 (4.0) | 10.2 (10.2 to 10.3) | — |
| Asian other | 17 (6.1) | 56 (20.1) | 121 (43.5) | 71 (25.5) | 13 (4.7) | 10.2 (10.1 to 10.3) | — |
| Other | 43 (5.6) | 144 (18.6) | 341 (44.1) | 192 (24.8) | 53 (6.9) | 10.3 (10.2 to 10.4) | — |
| Parental socioeconomic position | |||||||
| Managerial, professional | 55 (4.3) | 220 (17.4) | 629 (49.6) | 316 (24.9) | 47 (3.7) | 10.3 (10.2 to 10.4) | .04 |
| Intermediate | 75 (6.5) | 239 (20.6) | 511 (44.1) | 290 (25.0) | 45 (3.9) | 10.2 (10.1 to 10.3) | — |
| Routine, manual | 96 (6.9) | 254 (18.3) | 586 (42.3) | 361 (26.1) | 88 (6.4) | 10.3 (10.2 to 10.3) | — |
| Economically inactive | 33 (7.2) | 77 (16.9) | 171 (37.5) | 143 (31.4) | 32 (7.0) | 10.3 (10.2 to 10.4) | — |
| Unclassified or missing | 20 (7.8) | 51 (19.8) | 117 (45.5) | 56 (21.8) | 13 (5.1) | 10.2 (10.1 to 10.3) | — |
| . | Hours of Self-reported Sleep on a School Nighta . | . | . | ||||
|---|---|---|---|---|---|---|---|
| <9 h . | 9–9.9 h . | 10–10.9 h . | 11–11.9 h . | ≥12 h . | Adjusted Mean Sleep Hours (95 % CI) . | Pb . | |
| N | 279 (6.2%) | 841 (18.6%) | 2014 (44.5%) | 1166 (25.8%) | 225 (5%) | ||
| Average age, y (SD) | 10.0 (0.4) | 10.0 (0.4) | 10.0 (0.4) | 9.0 (0.4) | 9.8 (0.4) | 10.3 (10.2 to 10.3) | .05 |
| Boys | 180 (8.2) | 431 (19.7) | 963 (44.1) | 501 (22.9) | 110 (5.0) | 10.2 (10.1 to 10.2) | — |
| Girls | 99 (4.2) | 410 (17.5) | 1051 (44.9) | 665 (28.4) | 115 (4.9) | 10.4 (10.3 to 10.4) | <.0001 |
| Ethnic group | |||||||
| White European | 43 (3.9) | 179 (16.4) | 493 (45.3) | 316 (29.0) | 58 (5.3) | 10.4 (10.3 to 10.5) | <.0001 |
| Black African-Caribbean | 87 (7.6) | 245 (21.4) | 508 (44.4) | 252 (22.0) | 51 (4.5) | 10.1 (10.1 to 10.2) | — |
| South Asian | 89 (7.2) | 217 (17.5) | 551 (44.4) | 335 (27.0) | 50 (4.0) | 10.2 (10.2 to 10.3) | — |
| Asian other | 17 (6.1) | 56 (20.1) | 121 (43.5) | 71 (25.5) | 13 (4.7) | 10.2 (10.1 to 10.3) | — |
| Other | 43 (5.6) | 144 (18.6) | 341 (44.1) | 192 (24.8) | 53 (6.9) | 10.3 (10.2 to 10.4) | — |
| Parental socioeconomic position | |||||||
| Managerial, professional | 55 (4.3) | 220 (17.4) | 629 (49.6) | 316 (24.9) | 47 (3.7) | 10.3 (10.2 to 10.4) | .04 |
| Intermediate | 75 (6.5) | 239 (20.6) | 511 (44.1) | 290 (25.0) | 45 (3.9) | 10.2 (10.1 to 10.3) | — |
| Routine, manual | 96 (6.9) | 254 (18.3) | 586 (42.3) | 361 (26.1) | 88 (6.4) | 10.3 (10.2 to 10.3) | — |
| Economically inactive | 33 (7.2) | 77 (16.9) | 171 (37.5) | 143 (31.4) | 32 (7.0) | 10.3 (10.2 to 10.4) | — |
| Unclassified or missing | 20 (7.8) | 51 (19.8) | 117 (45.5) | 56 (21.8) | 13 (5.1) | 10.2 (10.1 to 10.3) | — |
Values are mean and SD for age; for all categorical variables, values are N (row %).
P value from likelihood ratio test for heterogeneity is from the same multilevel model.