Bidirectional Relationships Between Sleep Duration and Screen Time in Early Childhood

In this cohort study, a representative sample of 3427 children was obtained from Longitudinal Study of Australian Children. Bidirectional relationships between sleep duration and screen time (TV and Computer) were examined using a cross-lagged models for ages 4, 6 and 8 years. Sleep duration was recorded based on 2 time use diaries maintained by one of the parents on a weekday and weekend day, each. They found that sleep duration was inversely associated with subsequent screen time after two years. Significant associations were observed for children belonging to parents with low education level and extremes of socio-economic status (high and low). Future studies should be targeted to explore the factors resulting in these differences.

http://www.ncbi.nlm.nih.gov/pubmed/24589672