AI Article Synopsis
- Early-life parental factors, including positive personality traits and stress levels, significantly shape the environment for child development and can influence sleep health in children.
- The study involved 351 families from the Arizona Twin Project, assessing parental characteristics and children's sleep duration when the twins were both 12 months and 8 years old.
- Findings indicate that a more positive parental personality can reduce the genetic influence on sleep duration, while increased parental stress enhances genetic contributions, suggesting that both genetic and environmental factors play key roles in children's sleep health.
Article Abstract
Early-life positive and adverse parental factors, such as positive parent personality and parental stress, affect the environmental context in which children develop and may influence individual differences in children's sleep health. This study examined the moderating role of early-life parental factors in the heritability (i.e., the extent to which individual differences are due to genetic influences) of objectively assessed childhood sleep duration. A total of 351 families from the Arizona Twin Project were studied. Primary caregivers (95% mothers) reported on multiple dimensions of stress and facets of their own personality when the twins were 12 months old. Seven years later (M = 8.43 years, SD = 0.68), families completed a home visit, and twins (51% female; 57% White, 29% Hispanic; 30% monozygotic, 39% same-sex dizygotic, 31% other-sex dizygotic) wore actigraph watches to assess their sleep, with caregivers completing similar assessments on their personality attributes and stress. Early-life positive parent personality moderated the heritability of sleep duration (Δ-2LL [-2 log likelihood] = 2.54, Δdf = 2, p = .28), such that as positive parent personality increased, the heritability of duration decreased. Early-life parental stress also moderated the genetic contribution to sleep duration (Δ-2LL = 2.02, Δdf = 2, p = .36), such that as stress increased, the heritability of duration increased. Concurrent positive parent personality and parental stress composites showed similar patterns of findings. Results highlight the likely contribution of parent positive traits and adverse experiences to the etiology of children's sleep health, with genetic influences on children's sleep more prominent in "riskier" environments. Understanding how genetics and environments work together to influence the etiology of sleep may inform prevention programs.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11467747 | PMC |
| http://dx.doi.org/10.1016/j.jecp.2024.105994 | DOI Listing |
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