Table 4.
Relationship between sleep deprivation, characteristics of sleep quality, health behaviours and subjective health complaints for 8th grade girls and 10th grade boys (logistic regression).
| OR (95% CI) | |||||
| Girls | Sleep deprivation | Sleep less | Difficulties falling asleep | Waking up tired | Waking up middle of the night |
| Physical activity Every day | 1.66 (0.80-3.45) | 1.74 (0.98-3.10) | 1.34 (0.60-2.99) | ||
| TV <4 hours/day | 0.56 (0.39-0.79) | ||||
| Fruit and vegetables Every day | 0.54 (0.32-0.90) | 0.67 (0.42-1.06) | 0.63 (0.48-0.83) | ||
| Drink alcohol No | 0.34 (0.22-0.53) | 0.86 (0.55-1.36) | 0.99 (0.70-1.42) | 0.66 (0.48-0.90) | 1.02 (0.62-1.68) |
| Smoke cigarettes No | 1.45 (0.70-3.01) | 0.53 (0.29-0.97) | 0.88 (0.52-1.50) | 1.18 (0.71-1.96) | 0.51 (0.27-0.96) |
| Headache Rarely/never | 0.73 (0.46-1.16) | 0.87 (0.56-1.35) | 0.64 (0.46-0.89) | 0.88 (0.67-1.16) | 0.47 (0.28-0.79) |
| Sadness Rarely/never | 0.98 (0.61-1.55) | 0.73 (0.47-1.15) | 0.58 (0.42-0.81) | 0.73 (0.55-0.98) | 0.54 (0.33-0.89) |
| Tiredness Rarely/never | 0.80 (0.48-1.31) | 0.46 (0.27-0.78) | 0.65 (0.45-0.94) | 0.62 (0.47-0.83) | 0.62 (0.34-1.10) |
| Being bullied No | 0.80 (0.48-1.33) | 0.95 (0.63-1.41) | 0.84 (0.49-1.45) | ||
| Boys | Sleep deprivation | Sleep less | Difficulties falling asleep | Waking up tired | Waking up middle of the night |
| Physical activity Every day | 2.67 (1.49-3.44) | 1.14 (0.58-2.24) | 1.23 (0.50-3.06) | ||
| TV <4 hours/day | 1.17 (0.62-2.21) | ||||
| Fruit and vegetables Every day | 1.20 (0.73-1.96) | 0.85 (0.49-1.46) | 0.79 (0.54-1.15) | ||
| Drink alcohol No | 0.60 (0.37-0.97) | 0.46 (0.27-0.77) | 0.55 (0.33-0.92) | 0.62 (0.44-0.87) | 1.03 (0.53-2.03) |
| Smoke cigarettes No | 1.26 (0.66-2.41) | 0.77 (0.42-1.41) | 0.99 (0.53-1.87) | 0.63 (0.38-1.04) | 0.71 (0.31-1.63) |
| Headache Rarely/never | 0.58 (0.35-0.96) | 0.48 (0.28-0.82) | 0.49 (0.29-0.82) | 0.78 (0.53-1.15) | 0.65 (0.32-1.33) |
| Sadness Rarely/never | 1.15 (0.67-1.97) | 0.97 (0.56-1.68) | 0.66 (0.38-1.12) | 0.83 (0.55-1.25) | 0.51 (0.25-1.03) |
| Tiredness Rarely/never | 0.90 (0.55-1.49) | 1.05 (0.61-1.79) | 1.37 (0.80-2.34) | 0.88 (0.61-1.25) | 1.14 (0.55-2.38) |
| Being bullied No | 1.04 (0.49-2.27) | 0.74 (0.37-1.51) | 0.46 (0.20-1.03) | ||
OR, odds ratio; CI, confidence interval
Reference categories: physical activity, ≤6 days/week; TV, ≥4 hours/day; Fruit and vegetables, not every day; Drink alcohol, yes; Smoke cigarettes, yes; Headache, at least once a month; Sadness, at least once a month; Tiredness, at least once a month; Being bullied, yes.
Analyses were adjusted for all other health behaviours.
Significant odds are in bold.