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Volume 5 Supplement 1

3rd Congress of the International Foot and Ankle Biomechanics Community

Correlates of calf cramp in children with Charcot-Marie-Tooth disease

Journal of Foot and Ankle Research volume 5, Article number: O16 (2012) Cite this article

Background

Leg muscle cramps have been identified as the strongest independent predictor of worse quality of life in Australian children with Charcot-Marie-Tooth disease Type 1A (CMT1A) [1]. There is no accepted treatment for cramp in children with CMT and the cause of cramp is not well understood. Potential therapeutic targets should be carefully identified to direct clinical trials of interventions.

Materials and methods

81 children aged 2-16 years with CMT1A were recruited nationally through the Australasian Paediatric Charcot-Marie-Tooth Disease Registry [2]. Body size and measures of strength, ankle range, foot posture, balance, agility, endurance, gait and neurophysiology were assessed at The Children's Hospital at Westmead (Sydney) and Royal Children's Hospital (Melbourne). Data analysis included Pearson product moment and Spearman rank correlation coefficients for normally and non-normally distributed continuous data respectively, and Fischer's exact test for dichotomous data. Logistic regression analyses were performed to identify independent predictors of calf cramp.

Results

Of the 81 children, 26 (32%) reported calf cramp and one child each reported toe, quadriceps or arm cramp. Calf cramp was associated (p < 0.05) with older age; presence of hand tremor; stronger foot inversion, eversion, dorsiflexion and plantarflexion; and better performance in long jump and 9-hole peg tests. Logistic regression analysis revealed only increasing age (OR 1.32; 95% CI: 1.11 to 1.58; p = 0.002) and presence of hand tremor (OR 3.81; 95% CI: 1.18 to 12.56; p = 0.028) as independent predictors of calf cramp.

Conclusions

Calf cramps are common in children with CMT1A and worsen with age. This study revealed a previously unrecognised link between cramp and hand tremor in children with CMT1A. Further investigation of proposed mechanisms and risk factors common to both cramp and tremor will contribute to our understanding of these common complications of CMT1A.

References

  1. 1.

    Burns J, et al: Determinants of reduced health related quality of life in pediatric inherited neuropathies. Neurology. 2010, 75: 726-731. 10.1212/WNL.0b013e3181eee496.

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    Burns J, et al: Establishment of the Australasian paediatric Charcot-Marie-Tooth disease registry. Neuromuscular Disord. 2007, 17: 349-350. 10.1016/j.nmd.2006.11.007.

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Author information

Affiliations

  1. Discipline of Paediatrics and Child Health, The University of Sydney, Westmead, NSW, 2145, Australia

    Fiona E Blyton, Robert A Ouvrier & Joshua Burns

  2. Podiatry Program, The University of Newcastle, Ourimbah, 2258, Australia

    Fiona E Blyton

  3. Neurosciences Department, Royal Children’s Hospital, Parkville, 3052, Victoria, Australia

    Monique M Ryan

  4. Institute for Neuroscience and Muscle Research, The Children’s Hospital at Westmead, Sydney, NSW, 2145, Australia

    Robert A Ouvrier & Joshua Burns

Authors
  1. Fiona E Blyton
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  2. Monique M Ryan
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  3. Robert A Ouvrier
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  4. Joshua Burns
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Corresponding author

Correspondence to Fiona E Blyton.

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This article is published under license to BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Blyton, F.E., Ryan, M.M., Ouvrier, R.A. et al. Correlates of calf cramp in children with Charcot-Marie-Tooth disease. J Foot Ankle Res 5, O16 (2012). https://doi.org/10.1186/1757-1146-5-S1-O16

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Keywords

  • Logistic Regression Analysis
  • Independent Predictor
  • Spearman Rank Correlation
  • Potential Therapeutic Target
  • Disease Registry

Journal of Foot and Ankle Research

ISSN: 1757-1146