Abstract
Background
This study aimed to determine the relationships between subjective validated patient-reported outcomes and health-related quality of life, to objective gait characteristics in patients with foot–ankle conditions. Objective gait characteristics were obtained using a wearable foot inertial-sensor device as well as by assessing the relationships between spatiotemporal or gait parameters by analyzing the inter-metric correlations.
Methods
Fifty-two patients with foot–ankle conditions (37 women/15 men, aged 21–75 years) were included in this study. Clinical assessments, including evaluations of validated patient-reported outcomes using visual analog scale foot and ankle score, health-related quality of life using validated Short Form-36, and gait characteristics using a wearable foot inertial-sensor device, were performed and recorded for each patient.
Results
A significant negative correlation was observed between the physical component summary (PCS) and maximal cadence (r = − 0.308, P = 0.025). Significant positive correlations were noted between mean walking speed and mean cadence (r = 0.776, P < 0.001) and between maximal walking speed and mean step length (r = 0.498, P < 0.001). Significant negative correlations were found between the mean cadence and mean step length (r = − 0.491, P < 0.001) and between maximal cadence and mean step length (r = − 0.355, P = 0.009).
Conclusions
Cadence is an important objective spatiotemporal parameter to assess in foot and ankle patients as it relates well to outcome, with a significantly negatively correlation to subjectively reported PCS in health-related quality of life. Based on inter-metric relationships, an increased cadence might be used to maintain walking speed as a compensatory mechanism in patients with foot–ankle conditions.
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The first author reports personal fees from Amgen, Device Innovation, Phoenix surgical equipment (Thailand), Novatec Healthcare (Thailand), Pfizer, Eisai (Thailand), Symgens, Smith & Nephew, and Bangkok Unitrade outside the submitted work. The second author reports grants from Acumed, grants from Zimmer, grants from Bioventus, from null, grants from Wright medical, grants from Arthrex, grants from Synthes, grants from Ferring, and grants from Amniox, outside the submitted work.
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Angthong, C., Veljkovic, A. Relationships among subjective patient-reported outcome, quality of life, and objective gait characteristics using wearable foot inertial-sensor assessment in foot–ankle patients. Eur J Orthop Surg Traumatol 29, 683–687 (2019). https://doi.org/10.1007/s00590-018-2346-0
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DOI: https://doi.org/10.1007/s00590-018-2346-0