Growing pains and periodic limb movements of sleep in children

Man Wai Wong1, Bruce D Williamson, Wen Qiu

  • 1School of Women's and Children's Health, University of New South Wales, Sydney, New South Wales, Australia.

Insights

Children with growing pains (GP) were three times more likely to have periodic limb movements of sleep (PLMS). This suggests GP may be linked to restless legs syndrome, potentially sharing genetic factors.

Area of Science:

  • Pediatric Sleep Medicine
  • Neurology
  • Genetics

Background:

  • Growing pains (GP) are common in children, but their underlying mechanisms are not fully understood.
  • Periodic limb movements of sleep (PLMS) are characterized by repetitive limb movements during sleep.
  • Restless legs syndrome (RLS) shares potential genetic links with GP, suggesting a possible connection.

Purpose of the Study:

  • To determine if there is an association between growing pains (GP) and periodic limb movements of sleep (PLMS) in children.
  • To explore the hypothesis that GP may be part of the phenotypic spectrum of restless legs syndrome (RLS).

Main Methods:

  • Retrospective review of 903 children (aged 3-16) who underwent polysomnography (PSG) between January 2009 and May 2010.
  • Inclusion criteria: children without neuromuscular or neurological/developmental disorders, assessed by a single sleep physician.
  • Data collected: current GP, PLMS index, apnea/hypopnea index, and demographics; GP diagnosed pre-PSG.

Main Results:

  • Growing pains (GP) were present in 43 of 230 eligible children.
  • Children with GP had a significantly higher PLMS index (≥ 5/h) at 25.6% compared to 10.2% in children without GP (OR 3.04, P=0.014).
  • The association between GP and PLMS remained significant after adjustment (aOR 2.53, P<0.05); both were linked to restlessness as an indication for PSG.

Conclusions:

  • Children with growing pains (GP) were three times more likely to exhibit periodic limb movements of sleep (PLMS) during polysomnography (PSG).
  • The findings support an association between GP and PLMS.
  • This suggests GP may be a phenotypic manifestation within the spectrum of restless legs syndrome (RLS).
Abstract

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