Journal of the American Podiatric Medical Association · 2025
Foot Posture, Foot Function, and Balance in Patients With Nonspecific Low-Back Pain and Knee Osteoarthritis: A Cross-Sectional Study.
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Chen Min, Han Na, Miao Yu, Qiang Yujun, Zhang Wen, Liu Pengbo, Liu Qiyong, Li Dongmei
Аннотация
BACKGROUND: This study examined the influence of foot posture and balance function in individuals with knee osteoarthritis (KOA) and nonspecific low-back pain (LBP).
METHODS: This study included participants aged 40 to 65 years categorized into three groups: nonspecific LBP (n = 44), KOA (n = 43), and healthy controls (n = 45). Demographic data were collected and disability levels were assessed using the Oswestry Disability Index for LBP and the Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) for KOA. Foot posture was evaluated using the Foot Posture Index 6 (FPI-6) and navicular drop test, whereas balance was quantified using the Y Balance Test.
RESULTS: Analysis of the FPI-6 scores on the dominant side revealed significant differences between the LBP and healthy control groups (P = .008) and between the LBP and KOA groups (P = .005). The Manchester-Oxford Foot Questionnaire (MOXFQ) scores also showed significant differences between the KOA and healthy control groups (P = .022) and between the LBP and healthy control groups (P = .038). Overall, significant differences were observed among all groups in both FPI-6 (P = .006) and MOXFQ (P = .033) scores. The results of the multiple linear regression models indicated that MOXFQ scores significantly predicted the Oswestry Disability Index, with an R2 of 0.283 (P = .04), whereas WOMAC and FPI-6 scores were significant predictors of the WOMAC score, with an R2 of 0.078 (P = .04).
CONCLUSIONS: This study revealed distinct impairments in foot function and posture in KOA and LBP patients. Foot function was compromised in both groups, with more pronounced foot posture changes in the KOA group, whereas balance remained unaffected. Foot function was linked to disability in LBP and foot posture to disability in KOA. These findings highlight the importance of targeted foot assessment in KOA and LBP rehabilitation.
METHODS: This study included participants aged 40 to 65 years categorized into three groups: nonspecific LBP (n = 44), KOA (n = 43), and healthy controls (n = 45). Demographic data were collected and disability levels were assessed using the Oswestry Disability Index for LBP and the Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) for KOA. Foot posture was evaluated using the Foot Posture Index 6 (FPI-6) and navicular drop test, whereas balance was quantified using the Y Balance Test.
RESULTS: Analysis of the FPI-6 scores on the dominant side revealed significant differences between the LBP and healthy control groups (P = .008) and between the LBP and KOA groups (P = .005). The Manchester-Oxford Foot Questionnaire (MOXFQ) scores also showed significant differences between the KOA and healthy control groups (P = .022) and between the LBP and healthy control groups (P = .038). Overall, significant differences were observed among all groups in both FPI-6 (P = .006) and MOXFQ (P = .033) scores. The results of the multiple linear regression models indicated that MOXFQ scores significantly predicted the Oswestry Disability Index, with an R2 of 0.283 (P = .04), whereas WOMAC and FPI-6 scores were significant predictors of the WOMAC score, with an R2 of 0.078 (P = .04).
CONCLUSIONS: This study revealed distinct impairments in foot function and posture in KOA and LBP patients. Foot function was compromised in both groups, with more pronounced foot posture changes in the KOA group, whereas balance remained unaffected. Foot function was linked to disability in LBP and foot posture to disability in KOA. These findings highlight the importance of targeted foot assessment in KOA and LBP rehabilitation.