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What is already known on this topic?
Owing to physiological and societal factors, adolescent sleep patterns undergo significant changes compared to preadolescent sleep. These changes often involve later bedtimes during the school week and the subsequent need for catch-up sleep and later wake-up times during the weekend.1 Adolescents also have a high incidence of depression related to sleep loss, improving sleep patterns improves mood status.2
What this paper adds?
Previous studies have evaluated the effects of restricted or extended sleep on depression, but have not done so using a gradual sleep extension protocol, which would appear to be more acceptable and achievable for this population.2 ,3
The attempt to restrict weekend deviations from sleep protocols is a welcome addition, as irregular weekend sleep patterns are the most detrimental to ongoing sleep health among adolescents.
There was a lack of differentiation between the sleep extension and sleep hygiene groups. It would be expected that together and separately these two factors would improve sleep but we are unable to ascertain which one was the most contributing factor.
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