Journal
JOURNAL OF PSYCHIATRIC RESEARCH
Volume 44, Issue 4, Pages 253-261Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jpsychires.2009.08.012
Keywords
Pre-school children; Actigraphy; HPA system; Saliva cortisol; Sleep patterns; Psychosocial assessment
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Funding
- Swiss National Science Foundation SNF [32-68193.02, 32-66778.01]
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Background: Various studies of adult endocrinology and sleep show close connections between poor sleep quality, deterioration of the HPA axis and negative psychological characteristics. However, the extent to which these associations may have already emerged and developed in childhood remains unclear. Methods: A total of 82 preschoolers (age 4.91 +/- 0.48) underwent activity monitoring for seven consecutive days and nights, wearing a digital movement-measuring instrument. Additionally, on the first and on the last morning of sleep registration, the activity of the HPA axis was assessed via the amount of cortisol in the saliva. Psychological and behavioral assessments were also made. Results: Three sub-groups of good (22%), normal (58.5%) and poor (19.5%) sleepers were distinguished. Poor sleep patterns were associated with higher HPA activity and with behavioral/emotional difficulties. Conclusions: The interplay between unfavorable sleep patterns, deterioration of the HPA axis and behavioral/emotional difficulties is already apparent in pre-school children. (C) 2009 Elsevier Ltd. All rights reserved.
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