Table 4

Linear regression analyses separately for boys (n = 161–172)† and girls (n = 163–181)† for variables indicating interaction with gender
Boys Girls
Model 1 Model 2 Model 1 Model 2
B-coefficient [95% CI] B-coefficient [95% CI] B-coefficient [95% CI] B-coefficient [95% CI]
Television in the bedroom (yes/no) Television in the bedroom (yes/no)
Bedtime school day (hh:mm) 0.25 [0.05-0.44*] 0.26 [0.09-0.43**] −0.015 [−0.21-0.18] −0.06 [−0.23-0.11]
Bedtime weekends (hh:mm) 0.38 [0.09-0.66**] 0.30 [0.07-0.53*] −0.034 [−0.30-0.23] −0.10 [−0.33-0.12]
Sleep duration weekends (hh:mm/day) −0.12 [−0.47-0.24] −0.197 [−0.53-0.14] 0.44 [0.10-0.77**] 0.45 [0.14-0.76**]
Discrepancy in sleep duration (hh:mm) 0.05 [−0.31-0.42] 0.011 [−0.32-0.34] 0.45 [0.12-0.78**] 0.38 [0.06-0.70*]
Computer in the bedroom (yes/no) Computer in the bedroom (yes/no)
Bedtime school day (hh:mm) 0.26 [0.07-0.44**] 0.20 [0.03-0.37*] −0.02 [−0.23-0.18] −0.05 [−0.23-0.14]
Bedtime weekends (hh:mm) 0.49 [0.21-0.77***] 0.32 [0.10-0.56**] −0.04 [−0.32-0.24] −0.05 [−0.30-0.19]
Bedtime discrepancy (hh:mm) 0.28 [0.03-0.52*] 0.20 [−0.02-0.41] −0.01 [−0.24-0.23] 0.02 [−0.20-0.24]
Television viewing (hh:mm/day) Television viewing (hh:mm/day)
Bedtime discrepancy (hh:mm) −0.09 [−0.22-0.04] −0.06 [−0.18-0.05] 0.06 [−0.04-0.17] 0.02 [−0.08-0.12]

† Range of respondents in the analyses.

CI confidence interval.

Model 1: adjusted for grade and family structure.

Model 2: adjusted for grade, family structure and corresponding sleep variable 2006.

*<0.05, **<0.01, ***<0.001.

All independent variables are included separately in the models.

Nuutinen et al.

Nuutinen et al. BMC Public Health 2013 13:684   doi:10.1186/1471-2458-13-684

Open Data