Leg length difference and plantar fasciitis

NewsBot · Nov 17, 2019

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Relationship between lower limb dysmetria and plantar fasciitis
Henrique Mansur et al
Vol 13 NoSupl 1 (2019): Proceedings of the 19th Brazilian Ankle and Foot Medicine and Surgery Congress

Introduction: Plantar fasciitis is an inflammatory process of multifactorial etiology that affects the origin of the plantar fascia and surrounding structures. A difference in length between lower limbs is relatively common within the population and can sometimes cause changes in biomechanics and symptoms. The objective of this study is to evaluate the relationship between lower limb dysmetria and plantar fasciitis. Methods: A cross-sectional study was performed to measure the length of the lower limbs by scanometry in patients diagnosed with plantar fasciitis. Other risk factors, such as body mass index, foot shape and the presence of plantar calcaneal spur, were also assessed in foot radiographs. Results: Of the 54 patients included in the study, 44.4% were men, and the mean age was 50.38 (23-73 years); 81.5% had pain in one foot, and 53.7% had feet that were considered plantigrade. We observed dysmetria in 88.9% of the sample, with a mean of 0.749 cm (SD ±0.63). In addition, 46.3% feet with pain showed calcaneal spurs on the radiographs. Conclusion: Approximately 90% of patients showed lower-limb dysmetria and, in most cases, the side with the shorter limb was affected by plantar fasciitis
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NewsBot · Feb 9, 2024

Leg length discrepancy is not a risk factor for plantar fasciitis
Henrique Mansur et al
Arch Orthop Trauma Surg. 2024 Jan 29

Purpose: Plantar fasciitis (PF) is a main source of heel pain, and only about one-third of patients have bilateral symptomatic involvement, although age, body mass index (BMI), and physical activities are known risk factors. The high prevalence of unilateral involvement is poorly understood. We aimed to assess the potential association between PF and the leg length discrepancy (LLD) in unilateral PF.

Methods: A transversal case-control study was conducted from January 2019 to December 2020, including 120 participants allocated to two groups matched by BMI and sex: cases (with a diagnosis of PF; 50 ± 13 years) and control (without foot pain; 40 ± 15 years). For both groups, a difference greater than 0.64 cm in the scanometry determined the criteria for the presence of LLD.

Results: The multivariate logistic regression analysis showed an independent association of PF only with age (p < 0.001), and no association with LLD. We did not observe differences in the mean discrepancy (1.37 ± 0.83 cm in the PF group in comparison with 1.13 ± 0.37 cm in the control group, [p > 0.05]) or in the prevalence of LLD between groups (48% [n = 29] in the PF group compared with 42% [n = 25] in the control group, [p > 0.05]). In the PF group, 80% of the participants reported unilateral pain. We observed a higher prevalence of pain in the shorter limb (p < 0.05).

Conclusion: Age was the only factor associated with the diagnosis of PF when groups were matched by sex and BMI. LLD was not an independent factor associated with the diagnosis of PF. However, when PF is unilateral, the shorter limb is more affected with 70% of prevalence.
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