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Open Access 01-12-2024 | Research

Progression and risk factors of hallux valgus angle in elite adolescent dancers: a cohort study

Authors: Zijian Liu, Shuo Chen, Takumi Okunuki, Hiroki Yabiku, Takuma Hoshiba, Toshihiro Maemichi, Yanshu Li, Hanye Zhao, Tsukasa Kumai

Published in: BMC Musculoskeletal Disorders | Issue 1/2024

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Abstract

Introduction

To the best of our knowledge, no previous studies have linked the progression of hallux valgus (HV) with plantar pressure distribution. Therefore, this study aimed to determine the progression of HV angle in elite adolescent dancers and evaluate the risk factors associated with foot plantar pressure during demi-pointe movement.

Methods

For this cohort study, 40 adolescent dancesport dancers (age: 14.5 ± 1.3 years; height: 168.3 ± 8.3 cm; weight: 52.4 ± 8.1 kg) were recruited from a dancesport specialty school. All participants reported no foot or lower limb injuries or symptoms in the past year and were not undergoing any rehabilitation or medication treatment. The HV angle was measured by photography (HVAp). The HVAp survey included baseline and follow-up assessments after 1 year. Foot plantar pressures (kPa) were obtained using the F-Scan measurement system (Tekscan, Tokyo, Japan), and the data were divided into two categories based on the foot location (type 1: hallux, toe, and metatarsophalangeal [MTP] joint area and type 2: medial, middle, and lateral areas). Data were analyzed using the Pearson’s chi-square test and multiple logistic regression.

Results

The HVAp measurement demonstrated excellent reliability. A significant increase of 2.1° ± 3.5° in the HV angle of elite adolescent dancers was found at the 1-year follow-up assessment relative to that at baseline. There were significant correlations between the HVAp variation values and the hallux (r = − 0.480, P = 0.002), toe (r = − 0.313, P = 0.049), and MTP joint area (r = 0.446, P = 0.004) plantar pressure percentages in the type 1 category and medial area (r = − 0.331, P = 0.037) and middle area (r = 0.386, P = 0.014) pressure percentages in the type 2 category. Based on the multivariate logistic regression analysis, the HVAp variation values were associated with foot plantar pressure in the hallux (odds ratio [OR]: − 0.12, 95% confidence interval [CI]: − 0.191 to − 0.048, P = 0.002) and middle areas (OR: 0.09, 95% CI: 0.019 – 0.161, and P = 0.014) from the two categories, respectively.

Conclusion

This study demonstrated significant progression of the HV angle in elite adolescent dancers over 1 year, which was significantly associated with increased foot plantar pressure in the middle area and decreased plantar pressure in the hallux area. These findings highlight the importance of monitoring and addressing foot plantar pressure in adolescent dancers.
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Metadata
Title
Progression and risk factors of hallux valgus angle in elite adolescent dancers: a cohort study
Authors
Zijian Liu
Shuo Chen
Takumi Okunuki
Hiroki Yabiku
Takuma Hoshiba
Toshihiro Maemichi
Yanshu Li
Hanye Zhao
Tsukasa Kumai
Publication date
01-12-2024
Publisher
BioMed Central
Published in
BMC Musculoskeletal Disorders / Issue 1/2024
Electronic ISSN: 1471-2474
DOI
https://doi.org/10.1186/s12891-024-08005-9