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Association between portable screen-based media device access or use and sleep outcomes: a systematic review and meta-analysis
Carter B, Rees P, Hale L, Bhattacharjee D, Paradkar MS · JAMA Pediatrics 170(12):1202–1208 · 2016
Key finding
Even access to a device in the bedroom (not just use) doubled the odds of inadequate sleep.
Citation
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Evening use of light-emitting eReaders negatively affects sleep, circadian…Reading on a light-emitting device before bed delayed melatonin, lengthened sleep onset and reduced next-morning alertness vs a printed book.Bedtime mobile phone use and sleep in adultsPhone use after lights-out was linked to later bedtimes, longer sleep latency, more fatigue and worse sleep quality in adults."To sleep, perchance to tweet"In-bed social media use was associated with insomnia symptoms and anxiety — engagement, not just light.The inner clock — blue light sets the human rhythmReview of how short-wavelength light drives melanopsin signalling — the (smaller) light component of the screen problem.
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