McAlpine R T, Bettany-Saltikov J A, Warren J G
Bishop Auckland General Hospital, Cockton Hill Road, Bishop Auckland, UK.
J Back Musculoskelet Rehabil. 2009;22(3):173-8. doi: 10.3233/BMR-2009-0231.
Assessment of spinal posture during physiotherapy practice is routine, yet few objective measures exist to this end. The Middlesbrough Integrated Digital Assessment System (MIDAS) is a low cost portable system able to record 3D information on posture. The purpose of this study was to assess both the intra-rater and inter-rater reliability of the MIDAS system.
Twenty-five healthy subjects were recruited. A repeated measures design was used to record fifteen pre-palpated landmarks on the back of each subject. To limit the sources of variability, the principal researcher palpated the landmarks for each subject. Each of three raters took two measurements on each subject in a standardized upright posture. X (medio-lateral), Y (antero-posterior) and Z (height) landmark positions were recorded via a computer interface.
Both intra-rater agreement (mean ICCs - rater 1 r=0.970, rater 2 r=0.965 and rater 3 r=0.965, p< 0.001) and inter-rater agreement (mean ICCs r=0.967, p< 0.001) was very high between repeated measures and between markers. Error values for the z-axis (height) were the lowest.
The MIDAS demonstrated both high inter-rater and intra-rater reliability and provides an objective method for the assessment of posture in physiotherapy practice.
在物理治疗实践中评估脊柱姿势是常规操作，但为此目的的客观测量方法却很少。米德尔斯堡综合数字评估系统（MIDAS）是一种低成本的便携式系统，能够记录姿势的三维信息。本研究的目的是评估MIDAS系统的评分者内信度和评分者间信度。
招募了25名健康受试者。采用重复测量设计记录每个受试者背部的15个预先触诊的标志点。为了限制变异性来源，由主要研究者为每个受试者触诊标志点。三名评分者分别以标准化直立姿势对每个受试者进行两次测量。通过计算机接口记录X（内外侧）、Y（前后）和Z（高度）标志点的位置。
重复测量之间以及标记点之间的评分者内一致性（平均组内相关系数——评分者1 r = 0.970，评分者2 r = 0.965，评分者3 r = 0.965，p < 0.001）和评分者间一致性（平均组内相关系数r = 0.967，p < 0.001）都非常高。Z轴（高度）的误差值最低。
MIDAS系统显示出较高的评分者间信度和评分者内信度，并为物理治疗实践中的姿势评估提供了一种客观方法。
