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Radiographic Measurements of Patients With Juvenile Hallux Valgus Compared With Age-Matched Controls: A Cohort Investigation

  • Author Footnotes
    1 Private Practice, Perth, Western Australia, Australia.
    John Gregory McCluney
    Correspondence
    Address correspondence to: John Gregory McCluney, MSc (Pod), Woodlands Podiatry Surgery, 6 Liege Street, Perth, Western Australia 6018, Australia.
    Footnotes
    1 Private Practice, Perth, Western Australia, Australia.
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  • Author Footnotes
    2 Associate Professor, Head of Podiatry, School of Community Health, Charles Sturt University, Albury, New South Wales, Australia.
    Paul Tinley
    Footnotes
    2 Associate Professor, Head of Podiatry, School of Community Health, Charles Sturt University, Albury, New South Wales, Australia.
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  • Author Footnotes
    1 Private Practice, Perth, Western Australia, Australia.
    2 Associate Professor, Head of Podiatry, School of Community Health, Charles Sturt University, Albury, New South Wales, Australia.
      The purpose of this study was to investigate radiographic measurements in a cohort of patients with juvenile hallux valgus (with a hallux valgus angle > 15°) using standardized weightbearing x-rays compared with an age-matched control group. First metatarsal protrusion distance, metatarsus primus adductus angle, metatarsus adductus, first metatarsal cuneiform angle, calcaneal inclination angle, and talocalcaneal angles were assessed with discriminant functional analysis. A total of 37 sets of data were analyzed from patients with a mean age of 13.45 ± 1.75 years. The study identified 2 significant components of juvenile hallux valgus: a positive first metatarsal protrusion distance (P <.001) and metatarsal primus adductus angle (P = .002). Discriminant functional analysis was then used to determine the best predictors of juvenile hallux valgus. This analysis allowed only 1 variable, metatarsal protrusion distance, as a predictor of whether juvenile hallux valgus was present (P < .001), with 94.3% accuracy. This study showed that a positive metatarsal protrusion distance is a significant component of juvenile hallux valgus.

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