Table 3

The associations examined by linear regression analyses between baseline computer use (hh:mm/day), TV viewing (hh:mm/day), media presence in bedroom (yes/no) and sleep habits (hh:mm/day) eighteen-months later among Finnish school-aged children (n = 327–353)†
Model 1 Model 2
B-coefficient 95% CI B-coefficient 95% CI
Computer in bedroom
Sleep duration school days −0.15 −0.31-0.01 −0.11 −0.27-0.04
Sleep duration weekends −0.01 −0.25-0.24 −0.04 −0.26-0.19
Bedtime school day 0.13 −0.01-0.27 0.09 −0.04-0.21
Bedtime weekend 0.25 0.05-0.45* 0.16 −0.01-0.33
Discrepancy of bedtime school days and at weekends 0.15 −0.02-0.32 0.12 −0.03-0.27
Discrepancy in sleep duration school and at weekends 0.15 −0.11-0.40 0.07 −0.17-0.3
Television in bedroom
Sleep duration school day −0.09 −0.26-0.07 −0.09 −0.24-0.07
Sleep duration weekends −0.14 −0.10-0.39 0.11 −0.12-0.34
Bedtime school day 0.12 −0.02-0.26 0.10 −0.02-0.23
Bedtime weekends 0.18 −0.01-0.38 0.11 −0.06-0.27
Discrepancy of bedtime school day and at weekends 0.08 −0.08-0.24 −0.02 −0.13-0.16
Discrepancy in sleep duration school day and at weekends 0.24 −0.01-0.48 0.19 −0.04-0.42
Computer use
Sleep duration school day −0.18 −0.26-(−)0.10*** −0.14 −0.22-(−)0.07***
Sleep duration weekends −0.09 −0.21-0.032 −0.09 −0.20-0.02
Bedtime school day 0.19 0.13-0.26*** 0.14 0.08-0.20***
Bedtime weekends 0.19 0.09-0.29*** 0.12 0.04-0.20**
Discrepancy of bedtime school day and at weekends −0.004 −0.08-0.07 0.004 −0.07-0.07
Discrepancy in sleep duration school day and at weekends 0.10 −0.02-0.22 0.06 −0.05-0.17
Television viewing
Sleep duration school day −0.09 −0.17-(−)0.01* −0.07 −0.14-0.01
Sleep duration weekends −0.01 −0.13-0.11 −0.01 −0.12-0.11
Bedtime school day 0.10 0.04-0.17** 0.07 0.01-0.13*
Bedtime weekends 0.10 −0.001-0.20 0.04 −0.04-0.13
Discrepancy of bedtime school day and at weekends −0.01 −0.09-0.07 −0.02 −0.09-0.05
Discrepancy in sleep duration school day and at weekends 0.09 −0.03-0.21 0.08 −0.04-0.19

† Range of respondents in the analyses.

CI confidence interval.

Model 1: Adjusted for gender, grade, nuclear family.

Model 2: Adjusted for gender, grade, nuclear family, 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