[논문]Effects of a Newly Designed Pelvic Belt Orthosis on Functional Mobility of Adults with Post-Stroke Hemiparesis

Cho, Byeong-Mo; Zarayeneh, Neda; Suh, Sang C.

doi:10.15268/ksim.2020.8.4.125

[국내논문] Effects of a Newly Designed Pelvic Belt Orthosis on Functional Mobility of Adults with Post-Stroke Hemiparesis 원문보기

Journal of the Korean Society of Integrative Medicine = 대한통합의학회지, v.8 no.4, 2020년, pp.125 - 131

Cho, Byeong-Mo (Dept. of Prosthetics & Orthotics, Korea National University of Welfare) , Zarayeneh, Neda (Dept. of Department of Computer Science, Texas A&M University-Commerce) , Suh, Sang C. (Dept. of Department of Computer Science, Texas A&M University-Commerce)

Abstract ▼ AI-Helper

Purpose : Lower extremity orthoses have been used as conservative methods to recover gait of the stroke patients. The purpose of this study is to examine how newly designed pelvic belt orthosis can improve gait ability and dynamic balance of adults with Hemiparesis after stroke. Methods : 22 patients who had hemiparesis after stroke participated in this study. Two groups were randomly created by assigning 10 subjects to the experimental group and the rest of the 12 subjects to the control group. The control group was treated by conventional physical therapy and occupational therapy. Identical therapy protocols were used to treat the experimental group who were assigned to wear the pelvic belt orthosis during post measurement. This study has a group of independent variables including group, gender, age, height, MAS, lesion side, cause and a group of dependent variables including gait speed, cadence, step length, stride length, and dynamic balance. The GAITRite system was used to measure spatial-temporal gain parameters and the balance system SD to measure dynamic balance. The data was analyzed using R version 3.3.1. Random forest, boosting algorithm, and MANOVA test were conducted to determine the effects of independent variables on dependent variables. Results : This study has a group of independent variables including group, gender, age, height, MAS, lesion side, cause and a group of dependent variables including gait speed, cadence, step length, stride length, and dynamic balance. The independent variable "group" has the most important value, which is approximately 25.42 (%IncMSE) representing a value three times greater than the second important predictor "height." Conclusion : As a result of this research, the hypothesis is validated with conclusion that Pelvic Belt orthosis could be effectively used for improving gait ability and balance of the patients with post-stroke hemiparesis.

주제어

표/그림 (3)

표 Table 1. Subject characteristics
표 Table 2. Effects of independent variables on dependent variables
그림 Fig 1. Result of boosting algorithm

AI 본문요약
AI-Helper

제안 방법

Before the start of the measurements, the participants were given a full explanation of the research purpose and experimental procedure, and signed Institutional Review Board consent forms to comply with the ethical principles of the Declaration of Helsinki (1975, revised 1983).
For this purpose, using multivariate tree boosting as a method for non-parametric regression is beneficial. In this paper, we are extending these two methods along with linear regression for a group of independent variables and a group of dependent variables to analyze the dataset and find the importance of independent variables in order to predict the dependent variables as well as illustrate the correlation between dependent variables. The purpose of this study is to realize the effect of applying the pelvic belt in stroke patients using some specific methods.
The inclusion criteria were as follows: (1) the sub-acute patient cohort diagnosed with post-stroke hemiplegia that has occurred within 3 months to 6 months, (2) the patient cohort who could walk independently for at least 10 m, (3) the patient cohort who did not have any orthopedic disease, (4) the patient cohort whose modified Ashworth scale (MAS) was less than 2, (5) the patient cohort whose scores on the Korean version of the mini mental state examination were at least 24.
The purpose of the current study was to determine the effect of new designed pelvic belt orthosis intervention in balance and gait ability of post-stroke patients. As a result, the balance and gait ability of the experimental group dramatically improved compared with the control group.
In this paper, we are extending these two methods along with linear regression for a group of independent variables and a group of dependent variables to analyze the dataset and find the importance of independent variables in order to predict the dependent variables as well as illustrate the correlation between dependent variables. The purpose of this study is to realize the effect of applying the pelvic belt in stroke patients using some specific methods.
The purpose of this study was to focus on how newly designed pelvic belt orthosis affects gait ability of the patients with post-stroke hemiparesis and dynamic balance using a statistical method.
Random forest is a very effective method to find variable importance. This study has a group of independent variables including group, gender, age, height, MAS, lesion side, cause and a group of dependent variables including gait speed, cadence, step length, stride length, and dynamic balance. Variable importance is measured using the random forest as shown in Table 2.

대상 데이터

A total of 22 post-stroke patients participated in this study. 10 of them were assigned to the experimental group wearing orhosis, and the other 12 were assigned as controls.
A total of 22 subjects participated in this study. 10 of them were assigned to the experimental group, and the other 12 subjects were assigned to the control group.
The study was conducted by 22 subjects who were screened based on the study inclusion criteria. All subjects are patients of K hospital in Incheon diagnosed with post-stroke hemiparesis.

성능/효과

Boosting uses a set of weak classifiers while combining them to derive a strong classifier, which reduces bias for many "small" models with low variance. Based on the current findings, the pelvic belt orthosis proved to enhance gait ability.
While the most predictors for step length is height, it also has considerable importance approximately 40 % for cadence. Besides, the second most important predictors for dynamic balance and step length are weight (around 32 %) and age (around 28 %).
Finally, as illustrated in figure 1, the boosting algorithm decides that "group" variable is the most useful predictor for all dependent variable except step length, 100 % for gait speed, 91.6 % for stride length and more than 60 % for cadence and dynamic balance
Variable importance is measured using the random forest as shown in Table 2. The group having the most impactful independent variable indicated 25.42 (%IncMSE) which is three times greater, than the second significant predictor, height. Age, and MAS (7.
42 (%IncMSE) which is three times greater than the second significant predictor, height. These results suggest that pelvic belt orthosis can be useful for preventing falls and improving gait and balance.
We found that "group" has the most important value at approximately 25.42 (%IncMSE) which is three times greater than the second significant predictor, height
10 of them were assigned to the experimental group wearing orhosis, and the other 12 were assigned as controls. We used GAITRite for measuring the gait abilities. Dynamic balance ability was evaluated using BIODEX's balance system.

참고문헌 (17)

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