Kinematic cluster analysis of the crouch gait pattern in children with spastic diplegic cerebral palsy using sparse K-means method

Abbasi, Leila and Rojhani-Shirazi, Zahra and Razeghi, Mohsen and Raeisi-Shahraki, Hadi (2020) Kinematic cluster analysis of the crouch gait pattern in children with spastic diplegic cerebral palsy using sparse K-means method. Clinical biomechanics, 81. ISSN 0268-0033

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Abstract

Background: Crouch gait pattern is a common gait pattern in children with diplegic cerebral palsy with excessive knee flexion throughout stance phase. Few studies have grouped this pattern of gait and usually have examined only the features of gait in the sagittal plane and mostly lower extremities without considering pelvis and trunk behavior. Studies usually categorize the gait pattern according to important variables from the researcher's point of view. Sparse K-means is high dimensional clustering methods that perform clustering and variable selection simultaneously even with low sample size and large number of variables. Our aim was to define existing clusters of crouch gait pattern in children with spastic diplegic cerebral palsy. Methods: Cluster analysis was applied on the lower extremity, pelvis and trunk gait kinematics data of 64 limbs of children with crouch gait pattern and 64 limbs of typically developing children. Eighty-nine kinematic variables were used as input variables for clustering. Findings: Four clusters of crouch gait pattern were defined. Sparse K-means identified influential variables and identified the knee and hip flexion as a major factor in clustering. Kinematic of the trunk, pelvis and ankle was determined in each cluster. Trunk and pelvis kinematic features were strongly correlated with the knee and hip joint flexion severity. Interpretation: Obtained clusters were confirmed observationally. With increasing knee flexion, the kinematic of the trunk and pelvis were further away from the patterns of typically developing individuals. The clusters ranking appear to be reasonable based on the crouch severity. Keywords: Cerebral palsy; Crouch gait pattern; High dimensional cluster analysis; Sparse K-means.

Item Type: Article
Subjects: WE Musculoskeletal system
WS Pediatrics
Divisions: Faculty of Health > Department of Epidemiology
Depositing User: zeynab . bagheri
Date Deposited: 22 Feb 2021 05:36
Last Modified: 22 Feb 2021 05:36
URI: http://eprints.skums.ac.ir/id/eprint/8874

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