Anens Elisabeth, Ahlström Isabell, Emtner Margareta, Zetterberg Lena, Nilsagård Ylva, Hellström Karin
Department of Neuroscience, Section for Physiotherapy, Uppsala, Sweden.
Department of Health Care Sciences, Faculty of Medicine and Health, Örebro University, Örebro, Sweden.
Physiother Theory Pract. 2023 Jan;39(1):137-153. doi: 10.1080/09593985.2021.1996498. Epub 2021 Nov 5.
The purpose was to evaluate the psychometric properties of physical activity measures in persons with multiple sclerosis (PwMS).
Adults with multiple sclerosis were recruited, n = 30 (validation) and n = 57 (test-retest). Steps measured with PiezoRX, Yamax SW200 and ActiGraph GT9X Link (AGlink) and time in different positions measured with AGlink were validated against data from video analysis. Psychometric properties of the Physical Activity and Disability Survey - Revised Swedish version (PADS-R(Sw)) was evaluated.
The most valid measures were AGlink using the low-frequency extension filter, and PiezoRX with median absolute percentage errors (MeAPEs) of 0.9-3.1% and 1.3-3.3%. The MeAPEs were higher for Yamax SW200 (2.9-21.0%), AGlink display (3.6-44.8%) and AGlink normal filter (8.9-48.9%), indicating low validity. AGlink was not valid in measurements of sitting (MeAPE 12.0-12.5%) or lying (MeAPE 31.0-41.7%). The correlation between PADS-R(Sw) and AGlink steps was r = 0.492 ( = .009). The relative reliability of PADS-R(Sw) was ICC 0.85 (CI 0.76-0.91), and absolute reliability was SEM 0.54.
AGlink and PiezoRX were valid measures of steps in PwMS. The questionnaire PADS-R(Sw) was valid, with high relative reliability, but its absolute reliability was unsatisfactory.
评估多发性硬化症患者（PwMS）身体活动测量指标的心理测量特性。
招募成年多发性硬化症患者，n = 30（用于验证）和n = 57（用于重测）。将PiezoRX、Yamax SW200和ActiGraph GT9X Link（AGlink）测量的步数以及AGlink测量的不同姿势时间与视频分析数据进行验证。对《身体活动与残疾调查 - 瑞典修订版》（PADS - R(Sw)）的心理测量特性进行评估。
最有效的测量方法是使用低频扩展滤波器的AGlink和PiezoRX，中位数绝对百分比误差（MeAPE）为0.9 - 3.1%和1.3 - 3.3%。Yamax SW200（2.9 - 21.0%）、AGlink显示屏（3.6 - 44.8%）和AGlink正常滤波器（8.9 - 48.9%）的MeAPE更高，表明有效性较低。AGlink在测量坐姿（MeAPE 12.0 - 12.5%）或躺姿（MeAPE 31.0 - 41.7%）时无效。PADS - R(Sw)与AGlink步数之间的相关性为r = 0.492（p = 0.009）。PADS - R(Sw)的相对可靠性为组内相关系数（ICC）0.85（置信区间0.76 - 0.91），绝对可靠性为标准误（SEM）0.54。
AGlink和PiezoRX是PwMS中步数的有效测量方法。问卷PADS - R(Sw)有效，具有较高的相对可靠性，但其绝对可靠性不令人满意。
