Actigraphic assessment of sleep disorders in children with chronic fatigue syndrome.
ABSTRACT Children with chronic fatigue syndrome (CFS) often suffer from sleep disorders, which cause many physiological and psychological problems. Understanding sleep characteristics in children with CFS is important for establishing a therapeutic strategy. We conducted an actigraphic study to clarify the problems in sleep/wake rhythm and physical activity in children with CFS.
Actigraphic recordings were performed for 1-2 weeks in 12 CFS children. The obtained data were compared with those of healthy age-matched children used as the control.
Sleep patterns were divided into two groups based on subjects' sleep logs: irregular sleep type and delayed sleep phase type. Compared to the control group, total sleep time was longer and physical activity was lower in both groups of CFS. Continuous sleep for more than 10h was not uncommon in CFS. In the irregular sleep type, impaired daily sleep/wake rhythms and disrupted sleep were observed.
Using actigraphy, we could identify several characteristics of the sleep patterns in CFS children. Actigraphic analysis proved to be useful in detecting sleep/wake problems in children with CFS.
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ABSTRACT: Actigraphic (ACT) recordings are used widely in schoolchildren as a less intrusive and more extended approach to evaluation of sleep problems. However, critical assessment of the validity and reliability of ACT against overnight polysomnography (NPSG) are unavailable. Thus, we explored the degree of concordance between NPSG and ACT in school-aged children to delineate potential ACT boundaries when interpreting pediatric sleep. Non-dominant wrist ACT was recorded simultaneously with NPSG in 149 healthy school-aged children (aged 4.1-8.8 years, 41.7% boys, 80.4% Caucasian) recruited from the community. Analyses were limited to the Actiware (MiniMitter-64) calculated parameters originating from 1-min epoch sampling and medium sensitivity threshold value of 40; i.e. sleep period time (SPT), total sleep time (TST) and wake after sleep onset (WASO). SPT was not significantly different between ACT and NPSG. However, ACT underestimated TST significantly by 32.2±33.4 min and overestimated WASO by 26.3±34.4 min. The decreased precision of ACT was also evident from moderate to small concordance correlation coefficients (0.47 for TST and 0.09 for WASO). ACT in school-aged children provides reliable assessment of sleep quantity, but is relatively inaccurate during determination of sleep quality. Thus, caution is advocated in drawing definitive conclusions from ACT during evaluation of the sleep-disturbed child.Journal of Sleep Research 03/2011; 20(1 Pt 2):223-32. DOI:10.1111/j.1365-2869.2010.00857.x
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ABSTRACT: The bedtime of preschoolers/pupils/students in Japan has become progressively later with the result sleep duration has become progressively shorter. With these changes, more than half of the preschoolers/pupils/students in Japan recently have complained of daytime sleepiness, while approximately one quarter of junior and senior high school students in Japan reportedly suffer from insomnia. These preschoolers/pupils/students may be suffering from behaviorally induced insufficient sleep syndrome due to inadequate sleep hygiene. If this diagnosis is correct, they should be free from these complaints after obtaining sufficient sleep by avoiding inadequate sleep hygiene. However, such a therapeutic approach often fails. Although social factors are often involved in these sleep disturbances, a novel clinical notion – asynchronization – can further a deeper understanding of the pathophysiology of these disturbances. The essence of asynchronization is a disturbance in various aspects (e.g., cycle, amplitude, phase and interrelationship) of the biological rhythms that normally exhibit circadian oscillation, presumably involving decreased activity of the serotonergic system. The major trigger of asynchronization is hypothesized to be a combination of light exposure during the night and a lack of light exposure in the morning. In addition to basic principles of morning light and an avoidance of nocturnal light exposure, presumable potential therapeutic approaches for asynchronization involve both conventional ones (light therapy, medications (hypnotics, antidepressants, melatonin, vitamin B12), physical activation, chronotherapy) and alternative ones (kampo, pulse therapy, direct contact, control of the autonomic nervous system, respiration (qigong, tanden breathing), chewing, crawling). A morning-type behavioral preference is described in several of the traditional textbooks for good health. The author recommends a morning-type behavioral lifestyle as a way to reduce behavioral/emotional problems, and to lessen the likelihood of falling into asynchronization.Brain & development 04/2009; DOI:10.1016/j.braindev.2008.07.006
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ABSTRACT: Children with allergic rhinitis (AR) are reported to have disturbed sleep and daytime fatigue due to nasal obstruction. To evaluate sleep impairment in children with AR using actigraphic evaluation. Fourteen children aged 7 to 16 years with grass pollen-sensitized seasonal AR were enrolled. They completed the Total 4-Symptom Score (T4SS) scoring system for AR symptom score and the Pittsburgh Sleep Quality Index (PSQI) questionnaire for sleep quality, and they underwent actigraphy for 3 days in the pretreatment period. After topical corticosteroid and antihistaminic treatment for 8 weeks, actigraphy, the T4SS, and the PSQI were repeated. Fourteen healthy children aged 8 to 16 years underwent actigraphy and completed the PSQI questionnaire as controls. There were no significant age or sex differences between the AR and control groups. Pretreatment PSQI and actigraphy scores were worse in the AR group vs the control group. After treatment, sleep quality improved, and there were no differences in actigraphy and PSQI scores between the 2 groups. Before treatment, the T4SS was significantly correlated with the sleep efficiency, daytime napping episodes, and total nap duration variables of actigraphy (r = -0.53, P = .004; r = 0.43, P = .02; and r = 0.39, P = .04, respectively). The T4SS was correlated with the total PSQI score (r = 0.67, P < .001). Sleep can be compromised in children with AR. There is a significant correlation of clinical symptom score with the actigraphic and PSQI variables. Therefore, actigraphy may be used as an objective tool to evaluate sleep disturbance in children with AR.Annals of allergy, asthma & immunology: official publication of the American College of Allergy, Asthma, & Immunology 10/2009; 103(4):290-4. DOI:10.1016/S1081-1206(10)60527-3