The abstract just says people genetically inclined to wake up early are less likely to have major depressive disorder.
The full text says their data are consistent recent randomized clinical trial that shifted the sleep timing of individuals with an evening diurnal preference.[1] But that study seems to be about making an unnatural schedule more bearable.[2] It should be compared to accommodating people's natural sleep cycles.
So isn't that a common sense? If you are inclined to wake up later than the society expects of you, then you are likely to be depressed because of the pressure?
> that shifted the sleep timing of individuals with an evening diurnal preference
> But that study seems to be about making an unnatural schedule more bearable.
That's sounds like something akin to telling a depressed person "why can't you just be happy?" and then making them watch comedy?
> that shifted the sleep timing of individuals with an evening diurnal preference
> But that study seems to be about making an unnatural schedule more bearable.
That's sounds like something akin to telling a depressed person "why can't you just be happy?" and then making them watch comedy?