scholarly journals Test-Retest Reliability of Low-Cost Posturography for Assessing Postural Stability Control Performance during Standing

2021 ◽  
Vol 2021 ◽  
pp. 1-11
Author(s):  
Sumet Heamawatanachai ◽  
Witawit Wiriyasakunphan ◽  
Kanokwan Srisupornkornkool ◽  
Chaiyong Jorrakate
Keyword(s):  
Postural Stability ◽  
Center Of Pressure ◽  
Low Cost ◽  
Intraclass Correlation ◽  
Stability Control ◽  
Control Performance ◽  
Cross Sectional ◽  
Stability Tests ◽  
Retest Reliability ◽  
Test Retest Reliability

Postural stability control performance assessment is necessary in providing important information for individuals who are at risk of falling or who have balance impairment. Instrumented assessment is suggested as a valid and reliable test, but the cost and the difficulty of setup are significant limitations. The aim of this cross-sectional (test-retest reliability) study was to develop and determine the reliability of a low-cost posturography for assessing postural stability control performance during standing. The low-cost posturography was developed with four load cells and an acrylic platform. The center of pressure (COP) displacement and velocity were analyzed using written software. Test-retest reliability was performed with six different standing postural stability tests in twenty healthy volunteers on two different days. Intraclass correlation coefficient (ICC), standard error of measurement (SEM), coefficient of variation (CV), and Bland–Altman plot and limits of agreements (LOA) were used for analyses. The low-cost posturography was accurate (ICC = 0.99, p < 0.001 ; SEM = 0.003 cm) when compared to the true with calculated X and Y coordinates, with a moderate to excellent test-retest reliability for both COP displacement (ICCs ranged 0.62–0.91, p < 0.05 ; SEMs ranged 17.92–25.77%) and COP velocity (ICCs ranged 0.62–0.91, p < 0.05 ; SEMs ranged 18.09–27.69%) in all standing postural stability tests. Bland–Altman plots and LOAs suggested good agreement of tested parameters from the developed low-cost posturography between different days. In conclusion, the developed low-cost posturography had adequate reliability for assessing COP displacement and velocity during standing postural control stability performance tests.

The Comparison of a Virtual Reality Headset and Force plate to Investigate Human Postural Control (Preprint)

2020 ◽  
Author(s):  
Brian Sylcott ◽  
Chia-Cheng Lin ◽  
Keith Williams ◽  
Mark Hinderaker
Keyword(s):  
Virtual Reality ◽  
Postural Control ◽  
Postural Sway ◽  
Center Of Pressure ◽  
Low Cost ◽  
Intraclass Correlation ◽  
Force Plate ◽  
Retest Reliability ◽  
Position Data ◽  
Test Retest Reliability

BACKGROUND Accurately measuring postural sway is an important part of balance assessment and rehabilitation. While force plates give accurate measurements, their cost and space requirements make their use impractical in many situations. OBJECTIVE The work presented here is aimed at addressing this issue by validating a virtual reality (VR) headset as a relatively low-cost alternative for postural sway measurement. The HTC Vive (VR) headset has built-in sensors that allow for position and orientation tracking making it a potentially effective tool for balance assessments. METHODS Participants in this study were asked to stand upright on a force plate (Neurocom platform) while wearing the HTC ViveTM. Position data was collected from the headset and force plate simultaneously as participants experienced a custom-built VR environment that covered their entire field of view. The Intraclass Correlation Coefficient (ICC) was used to examined the test-retest reliability on the postural control variables, including normalized path length (NPL), root-mean-square (RMS), and peak-to-peak (P2P), computed from the VR position output and the center of pressure (COP) data from the force plate. Liner regression were used to investigate the correlation between the VR and force plate measurements. RESULTS Results showed that the test-retest reliability of VR headset was similar to COP in RMS and P2P, ranging from .285 to .636 in VR and .228 to .759. Linear regression between VR and COP measures showed significant correlation in RMS and P2P. CONCLUSIONS Based on our results, the VR headset has potential for use in postural control measurements. However, further development of software and testing protocols for balance assessments is needed.

scholarly journals 72 Test-Retest Reliability and Minimal Detectable Change for Postural Sway by using Sway Meter in Elderly Subjects

2019 ◽  
Vol 48 (Supplement_4) ◽  
pp. iv18-iv27 ◽  
Author(s):  
Kitima Rongsawad ◽  
Laddawon Worawan ◽  
Karnsiree Jirarojprapa ◽  
Sararat Kaewkham ◽  
Sarawut Khattiwong
Keyword(s):  
Clinical Relevance ◽  
Postural Stability ◽  
Postural Sway ◽  
Intraclass Correlation ◽  
Elderly Subjects ◽  
Minimal Detectable Change ◽  
Detectable Change ◽  
Simple Method ◽  
Retest Reliability ◽  
Test Retest Reliability

Abstract Introduction Static postural stability is the ability to maintain the posture with minimum sway. Increasing postural sway during standing in different sensory conditions is associated with aging due to decline in sensory and motor functions. Sway area measured by using sway meter is usually simple method for assessing postural stability in elderly subjects. Like many biological measurements, sway area has an intrinsic variability that affects their test-retest reliability and responsiveness of postural stability assessment. The minimal detectable change (MDC) is ability to detect smallest change beyond measurement error that reflects a reliable change. Therefore, the MDC value could provide information of clinical relevance on postural stability. The aims of this study were to determine test-retest reliability and MDC of sway area obtained from sway meter in elderly subjects. Methods Twelve healthy elderly subjects aged 60 years and above were participated in this study. The test and retest repeatability of postural sway measurements were performed twice with a 1-hour interval. For each subject was assess postural sway using Lord’s sway meter during standing on 4 sensory conditions for 30 seconds of each condition. The test-retest reliability of sway area was calculated using intraclass correlation coefficient. The MDC for each sway area was calculated to quantify clinical relevance. Results The test-retest reliability of sway area revealed good to excellent reliability ranged from 0.85 to 0.94. Standard error of measurement (SEM) and MDC ranged from 75 to 205 mm2 and 209 to 568 mm2, respectively. Discussion and Conclusion Our findings reveal that sway area in different sensory conditions could be used in assessment of postural stability in elderly subjects. SEM and MDC of sway area increased when subjects were asked to close their eyes and on foam surface. The sway meter is a reliable tool for assessing postural stability in clinical setting.

scholarly journals The Inventory of Physical Activity Barriers for Adults 50 Years and Older: Refinement and Validation

2021 ◽  
Vol 5 (Supplement_1) ◽  
pp. 789-789
Author(s):  
Mariana Wingood ◽  
Salene Jones ◽  
Nancy Gell ◽  
Denise Peters ◽  
Jennifer Brach
Keyword(s):  
Physical Activity ◽  
Factor Analysis ◽  
Correlation Coefficient ◽  
Intraclass Correlation Coefficient ◽  
Assessment Tool ◽  
Intraclass Correlation ◽  
Community Dwelling ◽  
Cross Sectional ◽  
Retest Reliability ◽  
Test Retest Reliability

Abstract Addressing physical activity (PA) barriers is an essential component of increasing PA among the 56-73% of community-dwelling adults 50 years and older who are not performing the recommended 150 minutes of moderate-to-vigorous PA. As there is no feasible, multi-factorial tool to assess PA barriers among this population, we developed and validated a PA barrier assessment tool called the Inventory of Physical Activity Barriers (IPAB). We collected cross-sectional data on 503 adults (mean age 70.1), with 79 participants completing the scale twice for test-retest reliability and 64 completing a cross-over design examining the ability to use two administration formats interchangeably. Our analyses consisted of exploratory and confirmatory factor analysis, Cronbach alpha, intraclass correlation coefficient, Bland-Altman Plot, and t-tests. Using factor analysis, we identified and confirmed an eight-factor solution consisting of 27 items. The 27-item IPAB is internally consistent (alpha= 0.91), has a high test-retest reliability (intraclass correlation coefficient=0.99), and can differentiate between individuals who meet the recommended levels of PA and those who do not (p &lt; 0.001). The IPAB scores ranged between 1.00-3.11 for the paper format (mean=1.78) and 1.07-3.48 for the electronic format (mean=1.78), with no statistical difference between the paper and electronic administration formats (p=0.94), resulting in the conclusion that the two administration formats can be used interchangeably. Participant feedback illustrates that the IPAB is easy to use, has clear instruction, and is an appropriate length. The newly validated IPAB scale can be used to develop individualized PA interventions that address PA barriers among patients 50 years and older.

scholarly journals Test-Retest Reliability of the King-Devick Test in an Adolescent Population

2017 ◽  
Vol 52 (5) ◽  
pp. 439-445 ◽  
Author(s):  
Tyler J. Oberlander ◽  
Bernadette L. Olson ◽  
Lee Weidauer
Keyword(s):  
Intraclass Correlation ◽  
Correlation Coefficients ◽  
Cross Sectional Study ◽  
Testing Time ◽  
Cross Sectional ◽  
Healthy Adolescent ◽  
Retest Reliability ◽  
Intraclass Correlation Coefficients ◽  
Adolescent Population ◽  
Test Retest Reliability

Context:  The King-Devick (KD) test is a screening tool designed to assess cognitive visual impairments, namely saccadic rhythm, postconcussion. Test-retest reliability of the KD in a healthy adolescent population has not yet been established. Objective:  To investigate the overall test-retest reliability of the KD among a sample of healthy adolescents. Additionally, we sought to determine if sex and age influenced reliability. Design:  Cross-sectional study. Setting:  Secondary school. Patients or Other Participants:  Sixty-eight healthy adolescents, 41 boys (age = 15.4 ± 1.9 years) and 27 girls (age = 15.4 ± 1.9 years). Main Outcome Measure(s):  Participants completed the KD (version 1) at 3 testing sessions (days 1, 30, and 45) following standard instructions. We recorded total time to complete the reading of 3 cards for each participant during each testing session. Two-way random-effects intraclass correlation coefficients (ICCs) using single measurements repeated over time and repeatability coefficients were calculated. Linear mixed models were used to determine whether differences existed at each testing time and to examine whether changes that took place among visits were different by sex or age. Results:  Adolescents who completed the KD demonstrated acceptable reliability (ICC = 0.81; 95% confidence interval = 0.73, 0.87); however, the repeatability coefficient was large (±8.76 seconds). The sample demonstrated improvements between visits 1 and 2 (mean ± standard error = 4.3 ± 0.5 seconds, P &lt; .001) and between visits 2 and 3 (2.4 ± 0.5 seconds, P &lt; .001) for a total improvement of 6.9 seconds over 3 tests. No significant visit-by-sex or visit-by-age interactions were observed. Conclusions:  Despite the ICC being clinically acceptable, providers using the KD test for serial assessment of concussion in adolescents should be cautious in interpreting the results due to a large learning effect. Incorporating multiple measures can ensure accurate detection of sport concussion.

scholarly journals Arabic Translation of the Weight Self-Stigma Questionnaire: Instrument Validation Study of Factor Structure and Reliability (Preprint)

2020 ◽  
Author(s):  
Nasser F BinDhim ◽  
Nora A Althumiri ◽  
Mada H Basyouni ◽  
Omar T Sims ◽  
Noara Alhusseini ◽  
...  
Keyword(s):  
Factor Structure ◽  
Internal Consistency ◽  
Intraclass Correlation ◽  
Reliability And Validity ◽  
Arabic Version ◽  
Cross Sectional ◽  
Retest Reliability ◽  
Two Factors ◽  
Enacted Stigma ◽  
Test Retest Reliability

BACKGROUND While it is most often associated with its effects on physical health, obesity is also associated with serious self-stigmatization. The lack of a suitable, validated tool to measure weight-related self-stigma in Arabic countries may be partly responsible for the scarcity of literature about this problem. OBJECTIVE This study investigated the reliability and validity of an Arabic version of the Weight Self-Stigma Questionnaire (WSSQ). METHODS Data on the Arabic-translated version of the 12-item WSSQ were collected using two cross-sectional electronic questionnaires distributed among Saudi nationals through the Sharik Association for Health Research’s database in June 2020. Internal consistency, test-retest reliability, and exploratory factor analysis of the Arabic WSSQ were assessed and compared with the original English version and other translations. RESULTS For reliability analysis, 43 participants completed the Arabic WSSQ during two time periods. Internal consistency was α=.898 for the overall survey, α=.819 for the fear of enacted stigma subscale (factor 1), and α=.847 for the self-devaluation subscale (factor 2). The test-retest reliability of the intraclass correlation coefficient was α=.982. In the factor structure analysis, 295 participants completed the questionnaire. The Arabic WSSQ loading of the items was consistent with the original WSSQ, except for the loading of item 9, which was stronger in factor 2 than in factor 1. The two factors accounted for the observed variances of 47.7% and 10.6%. CONCLUSIONS The Arabic version of the WSSQ has good internal consistency and reliability, and the factorial structure is similar to that of the original WSSQ. The Arabic WSSQ is adaptable for clinicians seeking to assess weight-related self-stigma in Arabic-speaking people.

scholarly journals Reliability and Validity of a Mobile Device Application for Use in Sports-Related Concussion Balance Assessment

2017 ◽  
Vol 04 (01) ◽  
pp. e1-e6 ◽  
Author(s):  
Mark Burghart ◽  
Jordan Craig ◽  
Jeff Radel ◽  
Jessie Huisinga
Keyword(s):  
Mobile Device ◽  
Center Of Pressure ◽  
Pearson Correlation ◽  
Intraclass Correlation ◽  
Correlation Coefficients ◽  
Force Platform ◽  
Balance Assessment ◽  
Retest Reliability ◽  
Device Application ◽  
Test Retest Reliability

Background Balance assessment is necessary when evaluating athletes after a concussion. We investigated a mobile device application (app) for providing valid, reliable, and objective measures of static balance. Objectives The mobile device app would demonstrate similar test–retest reliability to force platform center of pressure (COP) sway variables and that SWAY scores and force platform COP sway variables would demonstrate good correlation coefficients. Methods Twenty-six healthy adults performed balance stances on a force platform while holding a mobile device equipped with SWAY (Sway Medical LLC) to measure postural sway based on acceleration changes detected by the mobile device's accelerometer. Participants completed four series of three 10-second stances (feet together, tandem, and single leg), twice with eyes open and twice with eyes closed. Test–retest reliability was assessed using intraclass correlation coefficients (ICC). Concurrent validity of SWAY scores and COP sway variables were determined with Pearson correlation coefficients. Results Reliability of SWAY scores was comparable to force platform results for the same test condition (ICC = 0.21–0.57). Validity showed moderate associations between SWAY scores and COP sway variables during tandem stance (r = –0.430 to –0.493). Lower SWAY scores, indicating instability, were associated with greater COP sway. Discussion The SWAY app is a valid and reliable tool when measuring balance of healthy individuals in tandem stance. Further study of clinical populations is needed prior to assessment use. Conclusion The SWAY app has potential for objective clinical and sideline evaluations of concussed athletes, although continued evaluation is needed.

scholarly journals Validity and Reliability of the Community Balance and Mobility Scale in Individuals With Knee Osteoarthritis

2014 ◽  
Vol 94 (6) ◽  
pp. 866-874 ◽  
Author(s):  
Judit Takacs ◽  
S. Jayne Garland ◽  
Mark G. Carpenter ◽  
Michael A. Hunt
Keyword(s):  
Knee Osteoarthritis ◽  
Convergent Validity ◽  
Dynamic Balance ◽  
Intraclass Correlation ◽  
Correlation Coefficients ◽  
Validity And Reliability ◽  
Cross Sectional ◽  
Retest Reliability ◽  
Knee Oa ◽  
Test Retest Reliability

Background There is a high incidence of falls in older adults with knee osteoarthritis (OA). Adequate dynamic balance and mobility reduce the risk of falls; however, there are currently no validated, advanced tests of dynamic balance and mobility for individuals with knee OA. Objective The purpose of this study was to determine the convergent validity, known-groups validity, and test-retest reliability of a dynamic test of balance and mobility, the Community Balance and Mobility Scale (CB&M), in a knee OA population. Design A cross-sectional design was used. Methods Twenty-five individuals aged 50 years and older with medial knee OA and an equal number of healthy controls completed the CB&M and other tests of balance and mobility, including the Berg Balance Scale, the Timed “Up & Go” Test, a test of maximal single-leg stance time, and the 10-Meter Walk Test (self-selected and fast walking speed). Convergent validity of balance tests with the CB&M was assessed using Pearson product moment correlation coefficients, and known-groups validity was assessed using independent t tests. Test-retest reliability of the CB&M was assessed using intraclass correlation coefficients (ICCs) and standard error of measurement (SEM). Results Scores on the CB&M were significantly correlated with all measures of balance and mobility for those with knee OA. There were significant differences in CB&M scores between groups. Scores on the CB&M were highly reliable in people with knee OA (ICC=.95, 95% confidence interval [95% CI]=0.70 to 0.99; SEM=3, 95% CI=2.68 to 4.67). Limitations Few participants had severe knee OA. Conclusions The CB&M displayed moderate convergent validity, excellent known-groups validity, and high test-retest reliability. The CB&M can be used as a valid and reliable tool to assess dynamic balance and mobility deficits in people with knee OA.

scholarly journals Validation of the Chinese version of the low physical activity questionnaire (LoPAQ) with ActiGraph accelerometer in hemodialysis patients

2021 ◽  
Vol 22 (1) ◽  
Author(s):  
Huang Rui ◽  
Zhang Haifen ◽  
Yang Yan ◽  
Fang Nina ◽  
Liu Qian ◽  
...  
Keyword(s):  
Physical Activity ◽  
Intraclass Correlation ◽  
Reliability And Validity ◽  
Hemodialysis Patients ◽  
Chinese Version ◽  
Cross Sectional ◽  
Retest Reliability ◽  
Physical Activity Questionnaire ◽  
Test Retest Reliability ◽  
Activity Questionnaire

Abstract Background Valid instruments for measuring physical activity at the low end of the physical activity range and producing quantitative results are required among dialysis patients who are extremely inactive. This study aimed to translate and adapt a Chinese version of the low physical activity questionnaire (LoPAQ) and to examine its reliability and validity among hemodialysis patients. Methods This was a cross-sectional study. The LoPAQ was translated into Chinese and culturally adapted following the standardized questionnaire adaptation process. Participants wore an ActiGraph for seven consecutive days and were asked to complete the Chinese version of the LoPAQ (C-LoPAQ) following the ActiGraph monitoring period. The criterion validity of the C-LoPAQ was examined with accelerometers using Spearman’s correlation coefficients. Bland-Altman plots were adopted to determine the absolute agreement between methods. The test-retest reliability was analyzed using the intraclass correlation coefficient (ICC). Results Eighty-five hemodialysis patients had valid accelerometers and C-LoPAQ data. The total walking time reported on LoPAQ was correlated with step counts by ActiGraph (rho = 0.47, p < 0.01). A moderate correlation was also observed between the C-LoPAQ and the ActiGraph-measured physical activity for total calories (rho = 0.44, p < 0.01). There was a fair correlation between ActiGraph-measured sedentary time and C-LoPAQ-measured inactive time (rho = 0.22, p < 0.05). The test-retest reliability coefficients of C-LoPAQ ranged from 0.30 to 0.66. Conclusions The C-LoPAQ demonstrated moderate validity for measuring low levels of physical activity, especially walking, and total kilocalories of physical activity among hemodialysis patients in China.

scholarly journals Arabic Translation of the Weight Self-Stigma Questionnaire: Instrument Validation Study of Factor Structure and Reliability

10.2196/24169 ◽  
2020 ◽  
Vol 4 (11) ◽  
pp. e24169
Author(s):  
Nasser F BinDhim ◽  
Nora A Althumiri ◽  
Mada H Basyouni ◽  
Omar T Sims ◽  
Noara Alhusseini ◽  
...  
Keyword(s):  
Factor Structure ◽  
Internal Consistency ◽  
Intraclass Correlation ◽  
Reliability And Validity ◽  
Arabic Version ◽  
Cross Sectional ◽  
Retest Reliability ◽  
Two Factors ◽  
Enacted Stigma ◽  
Test Retest Reliability

Background While it is most often associated with its effects on physical health, obesity is also associated with serious self-stigmatization. The lack of a suitable, validated tool to measure weight-related self-stigma in Arabic countries may be partly responsible for the scarcity of literature about this problem. Objective This study investigated the reliability and validity of an Arabic version of the Weight Self-Stigma Questionnaire (WSSQ). Methods Data on the Arabic-translated version of the 12-item WSSQ were collected using two cross-sectional electronic questionnaires distributed among Saudi nationals through the Sharik Association for Health Research’s database in June 2020. Internal consistency, test-retest reliability, and exploratory factor analysis of the Arabic WSSQ were assessed and compared with the original English version and other translations. Results For reliability analysis, 43 participants completed the Arabic WSSQ during two time periods. Internal consistency was α=.898 for the overall survey, α=.819 for the fear of enacted stigma subscale (factor 1), and α=.847 for the self-devaluation subscale (factor 2). The test-retest reliability of the intraclass correlation coefficient was α=.982. In the factor structure analysis, 295 participants completed the questionnaire. The Arabic WSSQ loading of the items was consistent with the original WSSQ, except for the loading of item 9, which was stronger in factor 2 than in factor 1. The two factors accounted for the observed variances of 47.7% and 10.6%. Conclusions The Arabic version of the WSSQ has good internal consistency and reliability, and the factorial structure is similar to that of the original WSSQ. The Arabic WSSQ is adaptable for clinicians seeking to assess weight-related self-stigma in Arabic-speaking people.

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