Estimation of muscle strength from actigraph data in Duchenne muscular dystrophy
Estimation of muscle strength from actigraph data in Duchenne muscular dystrophy
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DOI：
10.1111/ped.12348
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发表时间：
2014-10-01
影响因子：
1.4
通讯作者：
Endo, Fumio
中科院分区：
文献类型：
--
作者：
Kimura, Shigemi;Ozasa, Shiro;Endo, Fumio
背景本研究的目的是评估腕部活动记录仪在估计杜氏肌营养不良症患者肌肉力量方面的实用性。方法22名4-19岁的患者佩戴腕部活动记录仪监测日常生活活动，并进行膝关节伸展力量测试和6分钟步行测试。这些措施是在基线和一年后制定的。使用零交叉模式（ZCM）（指示运动频率）和比例积分模式（PIM）（指示活动水平或运动强度）对活动记录仪数据进行量化。 结果 走动患者的 ZCM 和 PIM 评分高于非走动患者（P < 0.001）。 ZCM评分与6分钟步行距离、ZCM评分与伸膝力量、PIM评分与6分钟步行距离、PIM评分与伸膝力量的相关系数分别为-0.44、0.25、0.58和0.63。这表明 PIM 得分与 6 分钟步行距离和膝关节伸展力量具有中等至良好的相关性。结论可以使用根据活动记录仪数据计算的 PIM 得分来估计肌肉力量。 PIM 分数是评估肌肉力量的一个很好的工具。
BackgroundThe purpose of this study was to evaluate the utility of a wrist actigraph for estimating muscle strength in Duchenne muscular dystrophy patients.MethodsTwenty-two patients aged 4-19 years wore a wrist actigraph to monitor activities of daily living, and underwent a test of knee extension strength and the 6min walk test. These measures were made at baseline and at 1 year later. The actigraph data were quantified using the zero crossing mode (ZCM), which indicates the frequency of movement, and the proportional integration mode (PIM), which indicates activity level or vigor of motion.ResultsThe ZCM and PIM scores of ambulatory patients were higher than those of non-ambulatory patients (P < 0.001). The correlation coefficient between ZCM score and 6min walk distance, ZCM score and knee extension strength, PIM score and 6 minute walk distance, and PIM score and knee extension strength was -0.44, 0.25, 0.58, and 0.63, respectively. This indicates that the PIM score had a moderate-good association with 6min walk distance and knee extension strength.ConclusionMuscle strength can be estimated using the PIM score calculated from actigraph data. The PIM score is a good tool for the estimation of muscle strength.