title: Deviations in gait metrics in patients with chronic ankle instability: a case control study.
abstract: BACKGROUND
  Gait metric alterations have been previously reported in patients suffering from chronic ankle instability (CAI). Previous studies of gait in this population have been comprised of relatively small cohorts, and the findings of these studies are not uniform. The objective of the present study was to examine spatiotemporal gait metrics in patients with CAI and examine the relationship between self-reported disease severity and the magnitude of gait abnormalities.
  
  
  METHODS
  Forty-four patients with CAI were identified and compared to 53 healthy controls. Patients were evaluated with spatiotemporal gait analysis via a computerized mat and with the Short Form (SF) - 36 health survey.
  
  
  RESULTS
  Patients with CAI were found to walk with approximately 16% slower walking velocity, 9% lower cadence and approximately 7% lower step length. Furthermore, the base of support, during walking, in the CAI group was approximately 43% wider, and the single limb support phase was 3.5% shorter compared to the control group. All of the SF-36 8-subscales, as well as the SF-36 physical component summary and SF-36 mental component summary, were significantly lower in patients with CAI compared to the control group. Finally, significant correlations were found between most of the objective gait measures and the SF-36 mental component summary and SF-36 physical component summary.
  
  
  CONCLUSIONS
  The results outline a gait profile for patients suffering from CAI. Significant differences were found in most spatiotemporal gait metrics. An important finding was a significantly wider base of support. It may be speculated that these gait alterations may reflect a strategy to deal with imbalance and pain. These findings suggest the usefulness of gait metrics, alongside with the use of self-evaluation questionnaires, in assessing disease severity of patients with CAI.
authors: Department of Orthopedic Surgery, Tel Aviv Sourasky Medical Center, Sackler Faculty of Medicine, Tel Aviv University, 6 Weizmann Street, Tel Aviv, 64239 Israel.
authors: Roy
authors: R
authors: Gigi
authors: Department of Orthopedic Surgery, Tel Aviv Sourasky Medical Center, Sackler Faculty of Medicine, Tel Aviv University, 6 Weizmann Street, Tel Aviv, 64239 Israel.
authors: Amir
authors: A
authors: Haim
authors: Department of Orthopedic Surgery, Tel Aviv Sourasky Medical Center, Sackler Faculty of Medicine, Tel Aviv University, 6 Weizmann Street, Tel Aviv, 64239 Israel.
authors: Elchanan
authors: E
authors: Luger
authors: AposTherapy Research Group, Herzliya, Israel.
authors: Ganit
authors: G
authors: Segal
authors: Department of Orthopedic Surgery, Rambam Medical Center, Haifa, Israel.
authors: Eyal
authors: E
authors: Melamed
authors: Department of Orthopedic Surgery, Assaf Harofeh Medical Center, Zerifin, Israel.
authors: Yiftah
authors: Y
authors: Beer
authors: Department of Orthopedic Surgery, Assaf Harofeh Medical Center, Zerifin, Israel.
authors: Matityahu
authors: M
authors: Nof
authors: Department of Orthopedic Surgery, Meir Medical Center, Kfar-Saba, Israel.
authors: Meir
authors: M
authors: Nyska
authors: AposTherapy Research Group, Herzliya, Israel.
authors: Avi
authors: A
authors: Elbaz
keywords: Chronic ankle instability; Gait; Quality of life
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