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PEDIATRICS Vol. 106 No. 5 November 2000, p. e70

ELECTRONIC ARTICLE:
Sleep and Periodic Limb Movement in Sleep in Juvenile Fibromyalgia

Received Jan 25, 2000; accepted Jun 7, 2000.

Catherine E. Tayag-Kier*, Gregory F. KeenanDagger , Lisabeth V. ScalziDagger , Brian Schultz*, Joanne Elliott, RPFT*; Huaqing Zhao§, and Raanan Arens*

From the * Division of Pulmonary Medicine and Sleep Disorders Center, Dagger  Section of Rheumatology, and the § Division of Biostatistics and Epidemiology, Children's Hospital of Philadelphia, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania.

Objectives.  Fibromyalgia has been recently recognized in children and adolescents as juvenile fibromyalgia (JF). In adult fibromyalgia, subjective complaints of nonrestorative sleep and fatigue are supported by altered polysomnographic findings including a primary sleep disorder known as periodic limb movements in sleep (PLMS) in some subjects. Although poor sleep is a diagnostic criterion for JF, few reports in the literature have evaluated specific sleep disturbances. Our objectives were to evaluate in a controlled study the polysomnographic findings of children and adolescents with JF for alterations in sleep architecture as well as possible PLMS not previously noted in this age group.

Methods.  Sixteen consecutive children and adolescents (15.0 ± 2.6 years of age) diagnosed with JF underwent overnight polysomnography. Polysomnography was also performed on 14 controls (14.0 ± 2.2 years of age) with no history of an underlying medical condition that could impact on sleep architecture. Respiratory variables, sleep stages, and limb movements were measured during sleep in all subjects.

Results.  JF subjects differed significantly from controls in sleep architecture. JF subjects presented with prolonged sleep latency, shortened total sleep time, decreased sleep efficiency, and increased wakefulness during sleep. In addition, JF subjects exhibited excessive movement activity during sleep. Six of the JF subjects (38%) were noted to have an abnormally elevated PLMS index (>5/hour), indicating PLMS in these subjects.

Conclusion.  Our study demonstrated abnormalities in sleep architecture in children with JF. We also noted PLMS in a significant number of subjects. This has not been reported previously in children with this disorder. We recommend that children who are evaluated for JF undergo polysomnography including PLMS assessment. juvenile fibromyalgia; periodic limb movement in sleep; restless legs syndrome. .


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