Application of the Gait Deviation Index to Study Gait Impairment in Adult Population With Spinal Cord Injury: Comparison With the Walking Index for Spinal Cord Injury Levels

Isabel Sinovas-Alonso; Diana Herrera-Valenzuela; Roberto Cano-de-la-Cuerda; Ana de Los Reyes-Guzmán; Antonio J Del-Ama; Ángel Gil-Agudo

doi:10.3389/fnhum.2022.826333

Application of the Gait Deviation Index to Study Gait Impairment in Adult Population With Spinal Cord Injury: Comparison With the Walking Index for Spinal Cord Injury Levels

Front Hum Neurosci. 2022 Apr 4:16:826333. doi: 10.3389/fnhum.2022.826333. eCollection 2022.

Authors

Isabel Sinovas-Alonso^{1

2}, Diana Herrera-Valenzuela^{1

2}, Roberto Cano-de-la-Cuerda³, Ana de Los Reyes-Guzmán², Antonio J Del-Ama⁴, Ángel Gil-Agudo²

Affiliations

¹ International Doctoral School, Rey Juan Carlos University, Madrid, Spain.
² Biomechanics and Technical Aids Unit, National Hospital for Paraplegics, Toledo, Spain.
³ Faculty of Health Sciences, Department of Physical Therapy, Occupational Therapy, Physical Medicine and Rehabilitation, Rey Juan Carlos University, Alcorcón, Spain.
⁴ School of Science and Technology, Department of Applied Mathematics, Materials Science, Engineering and Electronic Technology, Rey Juan Carlos University, Móstoles, Spain.

Abstract

The Gait Deviation Index (GDI) is a multivariate measure of overall gait pathology based on 15 gait features derived from three-dimensional (3D) kinematic data. GDI aims at providing a comprehensive, easy to interpret, and clinically meaningful metric of overall gait function. It has been used as an outcome measure to study gait in several conditions: cerebral palsy (CP), post-stroke hemiparetic gait, Duchenne muscular dystrophy, and Parkinson's disease, among others. Nevertheless, its use in population with Spinal Cord Injury (SCI) has not been studied yet. The aim of the present study was to investigate the applicability of the GDI to SCI through the assessment of the relationship of the GDI with the Walking Index for Spinal Cord Injury (WISCI) II. 3D gait kinematics of 34 patients with incomplete SCI (iSCI) was obtained. Besides, 3D gait kinematics of a sample of 50 healthy volunteers (HV) was also gathered with Codamotion motion capture system. A total of 302 (iSCI) and 446 (HV) strides were collected. GDI was calculated for each stride and grouped for each WISCI II level. HV data were analyzed as an additional set. Normal distribution for each group was assessed with Kolmogorov-Smirnov tests. Afterward, ANOVA tests were performed between each pair of WISCI II levels to identify differences among groups (p < 0.05). The results showed that the GDI was normally distributed across all WISCI II levels in both iSCI and HV groups. Furthermore, our results showed an increasing relationship between the GDI values and WISCI II levels in subjects with iSCI, but only discriminative in WISCI II levels 13, 19, and 20. The index successfully distinguished HV group from all the individuals with iSCI. Findings of this study indicated that the GDI is not an appropriate multivariate walking metric to represent the deviation of gait pattern in adult population with iSCI from a normal gait profile when it is compared with the levels of walking impairment described by the WISCI II. Future work should aim at defining and validating an overall gait index derived from 3D kinematic gait variables appropriate for SCI, additionally taking into account other walking ability outcome measures.

Keywords: Gait Deviation Index (GDI); gait impairment; spinal cord injury (SCI); three-dimensional (3D) kinematic gait data; walking index for spinal cord injury (WISCI).