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Using mobile phones after 10pm can trigger depression and loneliness, study reveals

Researchers can't prove that disruption to the body clock causes these problems, but argue that it's more evidence that modern life is 'scrambling our natural rhythms'

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According to The Times, people who spend the night checking social media, watching television or roaming around their homes are more likely to suffer from mood problems such as neuroticism and bipolar disorder.

They are also more likely to rate themselves as unhappy and more lonely, the study in The Lancet Psychiatry says.

While researchers cannot prove that disruption to the body clock causes these problems, they argue that it is more evidence that modern life is scrambling our natural rhythms saying: “Daytime is time for activity and darkness is time for sleep.”

Previous studies have linked shift work that disrupts the natural 24-hour cycle of the body to a range of long-term health problems.

Huge study links late phone use with poor sleep

But according to the paper, the latest research is the first attempt large-scale measurement of body clock disruption using wearable monitors on 91,000 middle aged people.

The monitors graded the test subjects circadian rhythms on how far they were from a healthy pattern of an active daytime and restful night.

Shockingly, one quarter of people had an abnormal pattern in which they were not much more active during the day than at night.

According to The Times, senior author of the study paper Daniel Smith said: “These were people who have very poor sleep hygiene, people on their mobile phones at midnight checking Facebook or getting up to make a cup of tea in the middle of the night.”

The people with abnormal patterns were six per cent more likely to suffer from depression and 11 per cent more likely to have bipolar disorder, and scored their happiness nine per cent lower.

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