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Sleep regularity; circadian rhythms; and chronotype as mechanisms of risk for affective dysregulation in female adolescents
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DOI：10.1017/S0954579426101242.png)
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Abstract
En 中文
In a sample of early post-menarchal female adolescents; this study examined sleep regularity in relation to depression symptoms; circadian rhythms; and chronotype preference. Sixty-six female adolescents; aged 11–14 and within fifteen months post-menarche; completed a one-week sleep and circadian rhythm assessment involving self-reported sleep behaviors; 24-h sleep monitoring using wrist actigraphy; and serial cortisol and 6-sulfatoxymelatonin collections for four days. Sleep regularity was operationalized as the probability of being in the same wake/sleep state at any two timepoints 24 h apart (i.e.; sleep regularity index (SRI)). Reduced SRI was associated with higher depressive symptoms (F [1; 273] = 18.65; p = < .0001); as were eveningness chronotype (F [1; 273] = 21.13; p = < .0001); sleep duration (F [1; 273] = 6.25; p = .01); and self-reported life stress (F [1; 273] = 22.82; p = < .0001). The interaction between SRI and chronotype was also a predictor of increased depression (F [1; 273] = 18.65; p = < .0001); such that eveningness and low sleep regularity predicted higher scores. Sleep regularity was not significantly associated with cortisol awakening response; cortisol slope; or overnight melatonin levels. Sleep regularity appears linked to altered mood in early post-menarchal girls. Further research linking sleep regularity to physiological processes governing sleep is warranted. Interventions targeting sleep regularity stand to improve mental health outcomes; as well as promote healthy developmental trajectories for affect regulation.
Keywords:
Adolescent sleep
chronotype
circadian rhythms
mood
sleep regularity
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