Prevalence of sleep problems by age and sex
| Age (years) | Total No | No (%) with disturbed sleep | No (%) with poor sleep | ||||
|---|---|---|---|---|---|---|---|
| ⩾1 a week | <1 a week | ||||||
| Boys | |||||||
| 5 | 1131 | 46 (4.1) | 141 (12.5) | 19 (1.7) | |||
| 6 | 1169 | 25 (2.1) | 89 (7.6) | 16 (1.4) | |||
| 7 | 1112 | 27 (2.4) | 72 (6.5) | 20 (1.8) | |||
| 8 | 1081 | 15 (1.4) | 63 (5.8) | 12 (1.1) | |||
| 9 | 1073 | 9 (0.8) | 42 (3.9) | 20 (1.9) | |||
| 10 | 1095 | 7 (0.6) | 29 (2.7) | 22 (2.0) | |||
| 11 | 676 | 6 (0.9) | 21 (3.1) | 12 (1.8) | |||
| Total | 7337 | 135 (1.8) | 457 (6.2) | 121 (1.6) | |||
| Girls | |||||||
| 5 | 1085 | 37 (3.4) | 148 (13.6) | 11 (1.0) | |||
| 6 | 1083 | 33 (3.1) | 92 (8.5) | 13 (1.2) | |||
| 7 | 1090 | 19 (1.7) | 76 (7.0) | 16 (1.5) | |||
| 8 | 1068 | 14 (1.3) | 69 (6.5) | 13 (1.2) | |||
| 9 | 1061 | 11(1.0) | 33 (3.1) | 21 (2.0) | |||
| 10 | 1018 | 7 (0.7) | 24 (2.4) | 23 (2.3) | |||
| 11 | 630 | 6 (1.0) | 17 (2.7) | 15 (2.4) | |||
| Total | 7035 | 127 (1.8) | 459 (6.5) | 112 (1.6) | |||