Nakao H1,2, Imaoka M1, Oka K1, Hida M1, Morifuji T1, Hashimoto M1, Matsumoto K2, Kita K2
1Osaka Kawasaki Rehabilitation University, Department of Rehabilitation, Kaizuka, Japan, 2Tokushima University, Graduate School of Technology, Tokushima, Japan
Background: The prevalence of foot deformations, such as hallux valgus and flatfeet, increase with age. However, the progression of foot deformations vary between individuals, which necessitates the consideration of related factors.
Purpose: Focusing on foot-arch height for individuals older than 40 years, we examined factors related to low-arch deformations.
Methods: We examined the right feet of 124 subjects (43 males) who were older than 40 years. The average subject age was 62.2±13.8 years-old, the average height was 159.2±9.2 cm, and the average body mass index (BMI) was 22.6±2.9 kg/m2. In the method, measurements of the questionnaire and feet measured the foot length and dorsal arch height[A1] . The questionnaire examined anamnesis and foot pain, and sports career. Arch height was measured with 2 examiners using a ruler and electronic calipers, with the value calculated by dividing the dorsal arch height [A2] by the foot length. Participants were measured and then categorized into either a low arch group or a non-low arch group. The low arch group had an arch height of 5.85 cm or less. The associations between the low arch and non-low arch groups were analyzed using multiple logistic regression. Furthermore, logistic regression analysis by the forced input method as adjusted by sex and age for the co-variates that had significant differences identified and independent significant factors were then examined. The significance level was set at 5%.
Results: The low arch group consisted of 31 subjects (25%) and the non-low arch group included 93 subjects (75%). From the multiple logistic regression analysis, a significant difference was observed in the 2 groups for age, BMI, and pain. The result of the logistic regression analysis after adjusting for sex and age, indicated that BMI was an independent significant factor (odds ratio = 0.83, 95% confidence interval: 0.70-0.99).
Conclusion(s): After age 40, high BMI was found to be a factor related to the decrease of foot-arch height.
Implications: We showed that high BMI is involved in low arch foot. Appropriate weight control might prevent flatfoot.
Keywords: Low foot arch, BMI, Middle and senior age
Funding acknowledgements: non
Purpose: Focusing on foot-arch height for individuals older than 40 years, we examined factors related to low-arch deformations.
Methods: We examined the right feet of 124 subjects (43 males) who were older than 40 years. The average subject age was 62.2±13.8 years-old, the average height was 159.2±9.2 cm, and the average body mass index (BMI) was 22.6±2.9 kg/m2. In the method, measurements of the questionnaire and feet measured the foot length and dorsal arch height[A1] . The questionnaire examined anamnesis and foot pain, and sports career. Arch height was measured with 2 examiners using a ruler and electronic calipers, with the value calculated by dividing the dorsal arch height [A2] by the foot length. Participants were measured and then categorized into either a low arch group or a non-low arch group. The low arch group had an arch height of 5.85 cm or less. The associations between the low arch and non-low arch groups were analyzed using multiple logistic regression. Furthermore, logistic regression analysis by the forced input method as adjusted by sex and age for the co-variates that had significant differences identified and independent significant factors were then examined. The significance level was set at 5%.
Results: The low arch group consisted of 31 subjects (25%) and the non-low arch group included 93 subjects (75%). From the multiple logistic regression analysis, a significant difference was observed in the 2 groups for age, BMI, and pain. The result of the logistic regression analysis after adjusting for sex and age, indicated that BMI was an independent significant factor (odds ratio = 0.83, 95% confidence interval: 0.70-0.99).
Conclusion(s): After age 40, high BMI was found to be a factor related to the decrease of foot-arch height.
Implications: We showed that high BMI is involved in low arch foot. Appropriate weight control might prevent flatfoot.
Keywords: Low foot arch, BMI, Middle and senior age
Funding acknowledgements: non
Topic: Musculoskeletal: lower limb
Ethics approval required: Yes
Institution: Osaka Kawasaki Rehabilitation University
Ethics committee: Research ethics committee
Ethics number: OKRU29-019
All authors, affiliations and abstracts have been published as submitted.
