Interactive effects of delayed bedtime and family-associated factors on depression in elementary school children.
Late bedtime plus family strain quadruples depression risk in elementary kids.
01Research in Context
What this study did
Researchers asked 676 Taiwanese elementary students about bedtime, family life, and mood.
They used a survey to see if late bedtime plus family problems raised depression risk.
What they found
Kids who went to bed late and had a poor family climate or weak parent bond faced four times the depression risk.
The risks piled up—one alone was bad, but together they were much worse.
How this fits with other research
Lin et al. (2013) used the same survey style and found a similar jump in risk for children in single-father homes when money or peer problems were also present.
Tassé et al. (2013) and Mikulovic et al. (2014) showed that late sleep timing is also linked to weight gain and less activity in people with intellectual disabilities, so bedtime matters across groups.
Eggleston et al. (2018) reviewed sleep problems in ADHD and urged routine screening—our survey adds depression as another reason to ask about bedtime in general classrooms.
Why it matters
If a child looks sad, ask what time they go to bed and how things feel at home. A quick family climate check gives you a fuller picture. Push bedtime earlier and loop parents in—small shifts can cut risk more than you think.
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02At a glance
03Original abstract
Shorter sleep time was reported to be associated with psychological functioning in children. We intended to examine the relationship between nocturnal sleep duration and depression status by investigating if delayed bedtime could be one of the enhancement factors for depression in children. A cross-sectional study was performed to investigate the depression status in elementary school children in middle Taiwan. Total 676 participants from 29 schools, in grades 3-6 were recruited to participate in the study. A modified depression scale for domestic school children was used to determine the depression status. Data of depression-related demographic characteristics, family, school variables and bedtime data were collected with a structured questionnaire. The results showed that almost one in five children (18%) had depression status. Delayed bedtime, child-parent relationship, family climate, and peer relationship were found to be the main predictors of childhood depression. Further stratification analysis showed that delayed bedtime significantly interacted with family climate and peer relationship on childhood depression. The risk of depression for children with a delayed bedtime of 10 PM and either in a non-harmonious family life or without a close parent-child relationship was 4.35 and 4.73 times greater than the reference group respectively. This study provides evidence for interactive effects between delayed bedtime and family concern factors which synergistically elevated the risk of childhood depression. This information may serve as a practical guide for parents and school teachers by recognizing that an adequate bedtime schedule could serve as a preventive measure against depression in children.
Research in developmental disabilities, 2011 · doi:10.1016/j.ridd.2011.08.011