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Analysis of quantitative ultrasound graphic trace and derived variables assessed at proximal phalanges of the hand in healthy subjects and in patients with cerebral palsy or juvenile idiopathic arthritis. A pilot study
Bone , 10/06/09

Baroncelli GI et al. – The aim of the study was to provide a reference database for some additional QUS variables reflecting morphology of the ultrasound graphic trace according to gender, age, height, weight, and body mass index (BMI), and to assess their clinical usefulness.Measurement of QUS variables derived from the morphological analysis of the ultrasound signal could give additional information in estimating bone mineral status in children and adolescents, probably reflecting some aspect related to bone structure.

Methods

52 patients (age 3.1–20.9 years) affected by cerebral palsy with spastic tetraplegia (CPST, n=38) or polyarticular active juvenile idiopathic arthritis (JIA, n=14) examined
In addition to AD-SoS and BTT, 2 QUS variables derived from morphological analysis of ultrasound graphic trace, such as energy, extrapolated from area under ultrasound signal received, and weighted-slope (W-slope), derived from angular coefficient of regression line fitting top point of peaks of the ultrasound signal, were measured by phalangeal QUS (DBM Sonic, IGEA)
)Values of QUS variables measured in patients were compared with sex- and age-reference values (n=1083, 587 males and 496 females, aged 3–21 years)

Results

Mean values of AD-SoS, BTT, energy, and W-slope reduced in patients as a whole compared with normative data
Fractured patients showed lower values of the QUS variables than fracture-free patients
No difference between patients with CPST and JIA
Age and height positively correlated with QUS variables
Age and number of fractures were independent predictors of the QUS variables

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