Journal article
Relationship Between Chronic Lateral Ankle Instability and Hindfoot Varus Using Weight-Bearing Cone Beam Computed Tomography
Foot & ankle international, Vol.40(10), pp.1175-1181
10/2019
DOI: 10.1177/1071100719858309
PMID: 31253045
Abstract
Varus hindfoot deformity may increase the risk of chronic lateral ankle instability (CLAI). Our aim was to analyze hindfoot alignment (HFA) in patients with CLAI using weight-bearing cone beam computed tomography (WBCT) to assess this risk.
This retrospective, comparative analysis was carried out using an existing WBCT database (Talas, CurveBeam LLC), including data sets for 370 consecutive feet (189 patients) obtained between July 2016 and October 2018 at a single institution. The software provided semiautomated measurement of HFA, given as foot ankle offset (FAO). Univariate analysis was conducted to compare feet with and without CLAI against sex, age, body mass index, and FAO. Significant variables were included in a multivariable logistic model with random effects to take into account correlation between feet of the same patient.
Forty-three feet had CLAI (34 patients). FAO (
= .0009) was significant for CLAI by univariate analysis. Mean FAO was -2.2% ± 5.5% (varus) and + 2.6% ± 4.7% (valgus) with and without CLAI history, respectively. Multivariable logistic regression adjusted for sex and age demonstrated a 35% increased odds ratio (OR) of CLAI per 1% reduction in FAO value (varus) (adjusted OR=0.64, 95% confidence interval [CI]: 0.49-0.84;
= .001) and no significant effect of sex (adjusted OR=0.52;
= .617) or age (adjusted OR=0.94;
= .165) after adjustment for FAO.
A positive relationship was found between varus HFA and the risk to have CLAI. Systematic recording of FAO measurements from WBCT images along with clinical data regarding CLAI history proved successful at quantifying the risk of CLAI.
Level III, retrospective cohort study.
Details
- Title: Subtitle
- Relationship Between Chronic Lateral Ankle Instability and Hindfoot Varus Using Weight-Bearing Cone Beam Computed Tomography
- Creators
- François Lintz - Générale de SantéAlessio Bernasconi - Royal National Orthopaedic HospitalLouise Baschet - Centre Hospitalier Universitaire de BordeauxCéline Fernando - Générale de SantéNazim Mehdi - Générale de SantéCesar de Cesar Netto - University of Alabama at BirminghamWeight Bearing CT International Study Group
- Resource Type
- Journal article
- Publication Details
- Foot & ankle international, Vol.40(10), pp.1175-1181
- DOI
- 10.1177/1071100719858309
- PMID
- 31253045
- ISSN
- 1071-1007
- eISSN
- 1944-7876
- Grant note
- name: Groupement de Coopération Sanitaire Ramsay Générale de Santé pour l’Enseignement et la Recherche
- Language
- English
- Date published
- 10/2019
- Academic Unit
- Orthopedics and Rehabilitation
- Record Identifier
- 9984304694502771
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