In a study published in the British Journal of Psychiatry of over 11,000 Australians who’d been diagnosed with depression, researchers from University of Sydney have discovered about one in four participants met the criteria for what they’re calling "circadian depression."

Today, lifestyle and health writer Sarah Berry on the sleep habits that may point to this type of depression, and how it can best be treated.

Further reading:

• New research may change the way many people with depression are treated

The Morning Edition brings you the story behind the story with the best journalists in Australia. Join host Samantha Selinger-Morris, from the newsrooms of The Sydney Morning Herald and The Age, weekdays from 5am.
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