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Handedness and spinal deformity.

C J Goldberg1, D P Moore, E E Fogarty

  • 1Children's Research Centre, Our Lady's Hospital for Sick Children, Dublin, Ireland.

Studies in Health Technology and Informatics
|November 17, 2006
PubMed
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Biological lateralisation is a factor in scoliosis, but left-handedness is not a confirmed risk factor for spinal deformity. Incidence varies by scoliosis type and patient sex, suggesting a complex relationship.

Area of Science:

  • Orthopedics
  • Neurology
  • Epidemiology

Background:

  • Biological lateralisation is observed in scoliosis, but its role remains unclear.
  • Previous studies have yielded conflicting results regarding left-handedness as a risk factor for spinal deformity.
  • The general population has a sinistrality (left-handedness) rate of approximately 10%.

Purpose of the Study:

  • To investigate the association between sinistrality and clinically significant scoliosis.
  • To determine if scoliosis lateralisation differs from population norms.
  • To explore correlations between curve pattern and handedness in various scoliosis types.

Main Methods:

  • A reassessment of a scoliosis database was performed.
  • 1,636 patients with complete data were analyzed.

Related Experiment Videos

  • Patients' preferred writing hand was recorded to determine handedness.

    • Main Results:

    • Overall left-handedness occurred in 11.5% of patients, significantly higher than the general population (p=0.04).
    • Increased left-hand preference was noted in boys with infantile idiopathic scoliosis and girls with infantile, juvenile, congenital, and syndromic scoliosis.
    • Reduced left-handedness was observed in girls with adolescent idiopathic scoliosis; curve pattern and handedness correlations varied by scoliosis type and sex.

    Conclusions:

    • This study does not confirm left-handedness as a risk factor for spinal deformity.
    • The incidence of left-handedness in scoliosis is not uniform and is reduced in certain groups, such as girls with adolescent idiopathic scoliosis.
    • Scoliosis lateralisation is a factor but likely a consequence of the scoliotic process rather than a cause.