A community-based study of insomnia in Hong Kong Chinese children: Prevalence, risk factors and familial aggregation

Department of Psychiatry, The Chinese University of Hong Kong, Shatin, Hong Kong.
Sleep Medicine (Impact Factor: 3.15). 05/2009; 10(9):1040-6. DOI: 10.1016/j.sleep.2009.01.008
Source: PubMed

ABSTRACT There has been limited data on familial aggregation of insomnia. We aimed to explore the prevalence, risk factors and familial aggregation of childhood insomnia with a large community-based sample.
A community-based epidemiologic study of sleep disorders was conducted among primary school children. Those children with at least one reported biological parent were recruited. A total of 5695 children (mean age 9.2; SD 1.8), 4939 of their reported biological mothers (mean age 38.9; SD 4.6) and 4289 of their reported biological fathers (mean age 43.3; SD 5.5) were studied.
The rates of insomnia 3 times/week in the past 12 months were 4.0%, 12.8% and 9.7% for children, mothers and fathers, respectively. A robust familial aggregation of insomnia was found even after adjustment of the shared environmental and socio-demographic factors. There was a significant dose-response relationship among the children across their parental status from neither, fathers, mothers to both parents with insomnia [3.0%, 7.1%, 9.5% and 11.9%; with ORs (95% CIs)=2.48 (1.82-4.37) for fathers, 3.42 (2.55-4.59) for mothers and 4.42 (2.42-8.10) for both parents, respectively]. In addition, the frequency of insomniac symptoms of the parents also had a dose-response effect on the rate of insomnia of their children.
Insomnia is a common problem in both children and their parents. A significant familial aggregation of childhood onset insomnia was seen in this study even after adjustment of the co-risk factors. There was a dose-response effect of parental insomnia on the rate of insomnia of their children with a slight predilection of maternal influences.

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    • "relatives, particularly the mother (Bastien and Morin, 2000; Beaulieu-Bonneau et al., 2007; Dauvilliers et al., 2005; Hauri and Olmstead, 1980; Wing et al., 201; Zhang et al., 2009). However, the vast majority of these studies were limited by the reliance on self-report of the probands with regard to the family history, with only two studies directly assessing first-degree relatives (Wing et al., 2012; Zhang et al., 2009). Moreover, twin studies have shown substantial heritability of insomnia and related constructs of poor sleep quality (see Barclay and Gregory, 2013 for an extensive review). "
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    Journal of Sleep Research 05/2014; 23(5). DOI:10.1111/jsr.12168 · 3.35 Impact Factor
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    • "It has been demonstrated to have satisfactory validity and internal consistency (Cronbach's α coefficient=0.846) (16). Teachers distributed the questionnaires to the children for completion by their parents. "
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    • "Consequently , prevalence estimates of insomnia symptoms in childhood have varied from 4% to 41% [1] [2] [3] [4] [5] [6] [7] [8] [9]. Insomnia symptoms of difficulty falling (DFA) and/or staying asleep (DSA) are the most common parent-reported sleep complaints in children, but little is known about the risk factors associated with insomnia symptoms in prepubescent children, with the exception of two population-based studies in China of children ages 6–13 years [3] [10]. These studies did not find age or gender effects on the prevalence of insomnia symptoms. "
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