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Table 3 Multivariate logistic regressions analysis of delayed sleep phase syndrome (DSPS) as a risk factor for register-based school non-attendance among boys and girls in the ung@hordaland study (n = 9,338)

From: Delayed sleep phase syndrome in adolescents: prevalence and correlates in a large population based study

  Days of non-attendance$ Hours of non-attendance$
  Girls Boys Girls Boys
Adjustment variables OR 95% CI OR 95% CI OR 95% CI OR 95% CI
Crude (DSPS) 3.15 2.22–4.70 4.57 2.93–7.14 2.37 1.60–3.53 4.90 3.23–7.45
Age, paternal education, cohabitant status and family economy 2.56 1.76–3.74 3.87 2.42–6.20 2.10 1.39–3.18 4.22 2.70–6.59
Ever tried alcohol 3.12 2.17–4.48 4.63 2.96–7.24 2.26 1.49–3.41 5.05 3.32–7.69
Depression 2.87 2.00–4.13 4.44 2.84–6.95 2.08 1.38–3.16 4.88 3.20–7.44
Insomnia 2.25 1.56–3.24 3.45 2.14–5.55 1.70 1.12–2.56 3.25 2.08–5.09
Fully adjusted model* 1.87 1.25–2.80 3.22 1.94–5.34 1.48 0.94–2.32 3.05 1.89–4.92
  1. $Dichotomized at the 90th percentile.
  2. *Adjusted for age, paternal education, cohabitant status, family economy, alcohol, insomnia and depression.