Symmetry index of step width and walking speed were mainly correlated with the difference of ankle inversion ROM between two sides ( R = -0.750, P = 0.005 R = -0.700, P = 0.011). During gait analysis, patients presented compromised gait patterns: shorter step length, larger step width, slower walking speed and shorter single support compared to healthy controls ( P < 0.001), and patients showed asymmetrical gait. Patients had poor outcomes of clinical assessments in the short-term. The control group only performed gait test. All patients underwent clinical assessments: Olerud and Molander ankle score (OMAS), ankle swelling and passive range of motion (ROM) of ankle, and completed gait biomechanical analysis when weight-bearing was allowed: temporal-spatial parameters, plantar pressure distributions, and surface electromyography (sEMG). 12 patients with trimalleolar fractures were recruited, and 12 healthy people served as controls. This study aimed to investigate the clinical outcomes and gait biomechanics in patients with trimalleolar fractures in the early postoperative period and compared to healthy controls. Ankle biomechanics studies on gait in patients with trimalleolar fractures are still rare. Dynamic, objective and precise evaluations such as gait analysis are needed. Although clinical assessments are valid, they are static and subjective. Most studies used clinical assessments to evaluate the functional status of the patients. ![]() Trimalleolar fracture is a common ankle fracture with serious complications and costly healthcare problem.
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