Table 1 Characteristics of the study sample (aged 3 to 13 years), including sociodemographic characteristics, sleep problems (CSHQ), and behavioural difficulties (SDQ); (n = 1101)
| Â | Mean (SD) | n (%) |
|---|---|
Sex | |
 Male | 557 (50.6) |
 Female | 544 (49.4) |
Age (yrs.) | 7.44 (3.13) |
 3 – 4 | 269 (24.4) |
 5 – 7 | 283 (25.7) |
 8 – 10 | 309 (28.1) |
 11 – 13 | 240 (21.8) |
SES | 13.42 (3.22) |
 Lower | 96 (8.7) |
 Intermediate | 664 (60.3) |
 Higher | 341 (31.0) |
SDQ scales | |
 Total difficulties score | 9.28 (5.57) |
 Hyperactivity/inattention | 3.66 (2.43) |
 Emotional problems | 2.14 (2.06) |
 Conduct problems | 2.07 (1.64) |
 Peer relationship problems | 1.41 (1.71) |
CSHQ scales | |
 Total sleep disturbance score | 42.55 (5.77) |
 Sleep anxiety | 4.86 (1.42) |
 Night wakings | 3.71 (1.17) |
 Daytime sleepiness | 12.33 (2.79) |
 Sleep duration | 3.88 (1.34) |
 Sleep disordered breathing | 3.30 (0.73) |
 Parasomnias | 8.24 (1.45) |
 Bedtime resistance | 7.03 (1.79) |
 Sleep onset delay | 1.57 (0.77) |