Analysing data from 6.9 million adolescents and adults from all over the US, researchers found that Americans now report more psychosomatic symptoms of depression, such as trouble sleeping and trouble concentrating, than their counterparts in the 1980s.
"Previous studies found that more people have been treated for depression in recent years, but that could be due to more awareness and less stigma," said Jean M Twenge, from the San Diego State University.
Compared to their 1980s counterparts, teens in the 2010s are 38 per cent more likely to have trouble remembering, 74 per cent more likely to have trouble sleeping and twice as likely to have seen a professional for mental health issues.
College students surveyed were 50 per cent more likely to say they feel overwhelmed, and adults were more likely to say their sleep was restless, they had poor appetite and everything was an effort - all classic psychosomatic symptoms of depression.
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The study also found that the suicide rate for teens decreased, though the decline was small compared to the increase in symptoms of depression.
With the use of anti-depressant medications doubling over this time period, Twenge speculates that medication may have helped those with the most severe problems but has not reduced increases in other symptoms that, she said, can still cause significant issues.