alexa Validity and reproducibility of hand-held dynamometry in children aged 4-11 years.
Physicaltherapy & Rehabilitation

Physicaltherapy & Rehabilitation

Journal of Novel Physiotherapies

Author(s): van den Beld WA, van der Sanden GA, Sengers RC, Verbeek AL, Gabrels FJ

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Abstract OBJECTIVE: To evaluate validity and reproducibility of hand-held dynamometry in 11 different muscle groups in children. DESIGN AND PATIENTS: Maximum isometric muscle strength was measured with a calibrated hand-held dynamometer in 61 patients aged 4-11 years who had been referred to our specialist centre in the past 3 years because of suspected myopathy. All the patients had had muscle biopsy. METHODS: Validity was assessed by the power to discriminate between patients with and without myopathy, using logistic regression analysis and receiver operating characteristic analysis and sensitivity and specificity at a specifically chosen cut-off point. Reproducibility was evaluated by test-retest reliability in a stratified random sample of 40 patients who returned for re-measurements, using the intraclass correlation coefficient and the standard error of measurement. RESULTS: In the patients, areas under the receiver operating characteristic curve ranged from 0.66 to 0.88. At a specifically chosen cut-off point, sensitivity varied from 73\% to 87\%, while specificity varied from 54\% to 80\%. Intraclass correlation coefficients ranged from 0.73 to 0.91. The standard error of measurement ranged from 3.3 N to 12.2 N. CONCLUSION: Performance of hand-held dynamometry varied widely in the 11 muscle groups. Highest performance was observed in the elbow flexors. Test-retest reliability of the mean value of 2 efforts was generally higher than the maximum value.
This article was published in J Rehabil Med and referenced in Journal of Novel Physiotherapies

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