|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|
|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|
|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|
|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***|
|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|
|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*|
|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