Hurkmans Henri L, Bussmann Johannes B, Benda Eric
Department of Physical Therapy, Erasmus MC-University Medical Center, Rotterdam, The Netherlands.
Arch Phys Med Rehabil. 2009 Feb;90(2):309-13. doi: 10.1016/j.apmr.2008.07.022.
To determine the validity and interobserver reliability of visual observation to assess partial weight-bearing.
Validation and interobserver reliability study.
University medical center.
Patients (N=10) with a total hip arthroplasty operated 1 to 12 months prior to the study referred by 10 physical therapists (5 experienced and 5 inexperienced in training patients in partial weight-bearing).
Not applicable.
The amount of weight-bearing assessed by visual estimation (visual analog scale score) in percentage body weight (BW). Actual weight-bearing (percentage BW) as measured with the Pedar Mobile system. The mean difference (systematic error) between visual estimation and the Pedar system and the SD of the differences (random error) were determined by the limits of agreement (LOA) method with multiple observations per subject. The intraclass correlation coefficient (ICC) was calculated as a measure for the interobserver reliability.
The mean difference +/- SD between visual observation and the reference method was -9.5+/-20.1 percentage BW (95% confidence interval, -24.0 to 5.0 percentage BW) with LOA ranging from -49.8 to 30.8 percentage BW. The ICC was .57. The therapists' experience in partial weight-bearing training had no effect on the mean difference (P=.349) between the 2 methods.
Visual observation is not a valid and reliable method to assess partial weight-bearing.
确定视觉观察评估部分负重的有效性和观察者间可靠性。
有效性和观察者间可靠性研究。
大学医学中心。
10名患者（N = 10），他们在研究前1至12个月接受了全髋关节置换术，由10名物理治疗师转诊而来（其中5名在训练患者部分负重方面经验丰富，5名经验不足）。
不适用。
通过视觉估计（视觉模拟量表评分）评估的负重占体重百分比（BW）。使用Pedar移动系统测量的实际负重（占BW的百分比）。通过一致性界限（LOA）方法，对每个受试者进行多次观察，确定视觉估计与Pedar系统之间的平均差异（系统误差）以及差异的标准差（随机误差）。计算组内相关系数（ICC）作为观察者间可靠性的度量。
视觉观察与参考方法之间的平均差异±标准差为-9.5±20.1% BW（95%置信区间，-24.0至5.0% BW），LOA范围为-49.8至30.8% BW。ICC为0.57。治疗师在部分负重训练方面的经验对两种方法之间的平均差异（P = 0.349）没有影响。
视觉观察不是评估部分负重的有效和可靠方法。
