Using electronic devices in bed before sleep linked to insomnia, daytime sleepiness, and sleep timing preferences

Mean time of media use per night was 46.6 minutes.

• Computer usage for playing, surfing, or reading may be linked to increased insomnia and a preference for eveningness.
• Mobile phone usage for playing, surfing, or texting may also be associated with insomnia and certain chronotypes, while negatively affecting morningness.
• Other media devices did not show any relationship with insomnia or chronotype.
• No type of media use was associated with daytime sleepiness.

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