Hallux Valgus Deformity and Postural Sway: A Cross-sectional Study
Omae H, Ohsawa T, Hio N, Tsunoda K, Omodaka T, Hashimoto S, et al.
Hallux Valgus Deformity and Postural Sway: A Cross-sectional Study. 2021.
https://gyazo.com/8946fdb5ab0431395084c3fb782bd778
https://gyazo.com/4abce5ba2f06715bfe779a3781eb2743
abst
Background: Hallux valgus deformity has been reported to be associated with increased postural sway. However, the direction and magnitude of postural sway associated with hallux valgus remain inconclusive. We assessed the association between hallux valgus deformity and postural sway using a force plate. Methods: The subjects were 169 healthy volunteers, >40 years old (63 males, 106 females, average age: 66.0 ± 12.4 years old), who took part in an annual medical examination. We investigated the photographic hallux valgus angle (°), total trajectory length of the gravity center fluctuation (mm), area of the center of pressure (mm2), mediolateral and anteroposterior postural sway (mm) in a standing position with 2-legged stance and eyes open, hallux pain (Numerical Rating Scale), trunk and lower limb muscle mass (kg). We classified the subjects into a hallux valgus group (n=44, photographic hallux valgus angle of 1 or both feet ≥20°) and a no hallux valgus group (n=125, photographic hallux valgus angle of both feet <20°) and analyzed the relationship between hallux valgus and postural sway. Results: The anteroposterior postural sway in the hallux valgus group (6.5 ± 2.8) was significantly greater than in the no hallux valgus group (5.4 ± 2.2, p=0.014), and the lower limb muscle mass in the hallux valgus group (12.4 ± 2.2) was significantly smaller than in the no hallux valgus group (13.5 ± 3.2, p=0.016). The total value of the photographic hallux valgus angle on both feet was positively correlated with the anteroposterior postural sway (p=0.021) and negatively correlated with the lower limb muscle mass (p=0.038). The presence of hallux valgus (p=0.024) and photographic hallux valgus angle were (p=0.008) independently related to the magnitude of anteroposterior postural sway. Conclusions: Hallux valgus deformity and its severity were positively associated with the magnitude of the anteroposterior postural sway.
背景 外反母趾は、姿勢動揺の増加と関連することが報告されている。しかし、外反母趾に関連する姿勢動揺の方向性や大きさについては、まだ結論が出ていない。我々は、外反母趾変形と重心動揺の関連性をフォースプレートを用いて評価した。 方法は以下の通り。対象者は、年1回の健康診断に参加した40歳以上の健康なボランティア169名（男性63名、女性106名、平均年齢：66.0±12.4歳）。写真の外反母趾角度（°），重心変動の総軌跡長（mm），圧力中心の面積（mm2），2本足立位・開眼立位での内側・前後方向の姿勢動揺（mm），外反母趾痛（Numerical Rating Scale），体幹・下肢筋量（kg）を調査した。対象者を外反母趾群（n＝44、写真上の片足または両足の外反母趾角度が20°以上）と外反母趾なし群（n＝125、写真上の両足の外反母趾角度が20°未満）に分類し、外反母趾と姿勢動揺との関係を分析した。 結果は以下の通り。外反母趾群の前後方向の姿勢動揺（6.5±2.8）は、外反母趾なしの群（5.4±2.2、p＝0.014）よりも有意に大きく、外反母趾群の下肢筋肉量（12.4±2.2）は、外反母趾なしの群（13.5±3.2、p＝0.016）よりも有意に小さかった。両足の写真の外反母趾角度の合計値は、前後方向の姿勢動揺と正の相関があり（p＝0.021）、下肢筋量と負の相関があった（p＝0.038）。また、外反母趾の有無（p＝0.024）と写真の外反母趾角度（p＝0.008）は、前後方向の姿勢動揺の大きさと独立して関係していた。
結論としては 外反母趾の変形とその重症度は、前後方向の姿勢動揺の大きさと正の相関があった。