NHS Page - Device Usage Linked to Less Sleep

This NHS page is about a study involved with 10,000 teenagers in Norway and electronic devices such as tablets, laptops and smartphones. This study was carried out by researchers in Norway and was a cross-sectional study identifying the relationship between the time teens spend using devices and the amount of sleep they get.





The research involved an analysis of whether those who used electronic devices more tended to sleep different amounts to those who used them less. The teens were also asked questions about their use of their devices and how much time they spend on various on-screen activities. 

The study found that older teens who use their devices more, tend to sleep less, however, the design of the study does reveal that screen time directly causes a lack of sleep - as researchers did not ask what they are using their device for, and the findings were both measured at the same time.

The study also found that the teens were more likely to feel they needed at least another 2 hours sleep more than they actually got. 
It is important to stress that getting enough sleep is vital for all age groups.

http://www.nhs.uk/news/2015/02February/Pages/Teen-screen-time-linked-to-poorer-sleep.aspx