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.