00:00Researchers at the University of Sydney have proposed a new circadian subtype of depression.
00:05They analyzed 11 380 participants in the Australian Genetics of Depression study.
00:11About one in four fit the subtype, which is defined by six criteria.
00:15These include an evening chronotype, a late sleep midpoint, social jet lag, and morning tiredness.
00:21Senior researcher Ian Hickey describes it as feeling jet lagged all the time.
00:26People with this subtype had earlier onset of depression and more severe features.
00:31They were also more likely to gain weight during episodes.
00:34They were less likely to benefit from common antidepressants and reported more side effects.
00:39The team suggests body clock treatments may be more relevant for this group.
00:43Examples are light therapy and melatonin.
00:46The findings were published in the British Journal of Psychiatry.
00:49Disclosure. This video contains stock footage and content created or enhanced using AI-assisted tools.
