Figures
Bland and Altman plots for single-task (ST) and dual-task (DT) gait speed: (A) ST gait speed, (B) DT digit span task gait speed, (C) DT auditory Stroop task gait speed, and (D) DT mobile phone task gait speed. The plots represent the difference between test 1 and test 2 (y-axis) plotted against the average of test 1 and test 2 (x-axis). The average difference between test 1 and test 2 is presented as a horizontal line on the plot (middle line), and the upper and lower lines represent the 95% upper and lower limits of these differences between the 2 tests.
Tables
Participants' Descriptive Data (N=62)a
↵a In the event of normally distributed data, the mean and standard deviation are given. In the event of abnormally distributed data, the median and the interquartile range [IQR] are provided. UPDRS=Unified Parkinson's Disease Rating Scale, MMSE=Mini-Mental State Examination, MoCA=Montreal Cognitive Assessment, FAB=Frontal Assessment Battery.
Test-Retest Scores for General Disease Characteristics During the Study Perioda
↵a Mean and standard deviation are given for normally distributed data: UPDRS-III=Unified Parkinson's Disease Rating Scale–part III, LED=levodopa equivalent dose, ABC=Activities-specific Balance Confidence scale, SCOPA-Cog=Scales for Outcomes in Parkinson's Disease–Cognition, ANT=Alternating Names Test, AIT=Alternating Intakes Test. Median and interquartile range (IQR) are given for non-normally distributed data: H&Y=Hoehn and Yahr stage, FOGQ=Freezing of Gait Questionnaire. In case of non-normally distributed data, the Wilcoxon signed rank test is presented instead of the t-test value to indicate the difference between the tests. * Significant at α<.05. ** Significant at α<.01.
Test-Retest Scores for Dual-Task Gait Parametersa
↵a Mean and standard deviation are given for normally distributed data. ICC=intraclass correlation coefficient, CI=confidence interval, SEM=standard error of measurement, MDC=minimal detectable change. Median and interquartile range (IQR) are given for abnormally distributed data. In case of non-normally distributed data, the Wilcoxon signed rank test value is presented instead of the t-test value to indicate differences between both tests, and Spearman correlation coefficients are presented instead of ICC values. * Significant at α<.05. ** Significant at α<.01.
Test-Retest Scores for DT Cognitive Task Measuresa
↵a Mean and standard deviation are given for normally distributed data. DT=dual task, ICC=intraclass correlation coefficient, CI=confidence interval, SEM=standard error of measurement, MDC=minimal detectable change. Median and interquartile range (IQR) are given for abnormally distributed data. In case of non-normally distributed data, the Wilcoxon signed rank test value is presented instead of the t-test value to indicate differences between both tests, and Spearman correlation coefficients are presented instead of ICC values. * Significant at α<.05. ** Significant at α<.01.
Supplementary Data
eTables
Files in this Data Supplement:
- eTables (PDF) (33 KB) -
This PDF contains the following supplements:
- eTable 1. Test-Retest Scores for Single-Task Gait Parameters
- eTable 2. Test-Retest Scores for Dual-Task Interference Gait Parameters
- eTable 3. Test-Retest Scores for Dual-Task Interference Cognitive Task Measures
- eTable 4. Test-Retest Scores for Single Task Cognitive Task Measures
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