Table 2.
Multiple logistic regression analysis of factors associated with insomnia (MISS ≥ 6) among adolescents aged 15–17 years (n = 1477).
| Independent Variables | Wald | OR | 95% CI for OR | p |
|---|---|---|---|---|
| Male sex | 4.692 | 1.380 | 1.031–1.846 | 0.030 |
| Poor self-reported health a | 97.515 | 4.349 | 3.248–5.822 | <0.0001 |
| ≥1 failed school course(s) | 4.331 | 1.474 | 1.023–2.125 | 0.037 |
| Poor perceived family financial situation | 0.460 | 1.247 | 0.659–2.359 | 0.498 |
| Physical activity ≤1 time/week | 3.527 | 1.334 | 0.987–1.803 | 0.060 |
| School start at 08:15 or earlier | 0.537 | 0.895 | 0.665–1.205 | 0.464 |
| Alcohol and/or cigarette use ≥1 time/month | 5.681 | 1.433 | 1.066–1.926 | 0.017 |
| Screen time (not school related) <4 h/day b | 0.137 | 0.947 | 0.709–1.265 | 0.711 |
CI = confidence interval; OR = odds ratio. Hosmer–Lemeshow goodness-of-fit test, p = 0.099; Nagelkerke’s pseudo-R2 = 0.271; there were no signs of multicollinearity (tolerance: 0.7–0.8). a Neither good nor bad/quite bad/very bad health. b Time spent on social media/gaming/TV/film on schooldays.