Kim Sun Mi, Sim Eun Geol, Lim Seong Gyu, Park Eun Sook
Department and Research Institute of Rehabilitation Medicine, Yonsei University College of Medicine, Seoul 120-752, Korea.
Ann Rehabil Med. 2012 Feb;36(1):33-8. doi: 10.5535/arm.2012.36.1.33. Epub 2012 Feb 29.
To determine reliability and clinical use of two methods of migration index (MI) in CP patients with or without hip dysplasia.
The materials included radiographs of 200 hips of children with cerebral palsy. Conventional anteroposterior radiographs of the pelvis were taken with the child in the supine position with standardized methods. Two rehabilitation doctors measured the migration index using two methods. In the classic method, the lateral margin of the acetabular roof was used as a landmark and in the modified method the lateral margin of the sourcil was used as a landmark. Each rater measured the migration index at three separate times with a time interval of at least one week. Intraclass correlation (ICC) was used to test the inter- and intra-rater reliability.
MI shows excellent intra-rater reliability in both the classic and modified methods, but the inter-rater reliability was higher in the classic method than in the modified method. When categorized according to the sourcil classification, inter-rater reliability was higher in the normal sourcil type and lower in the dysplastic sourcil types.
Generally, the classic method showed higher reliability than the modified method, even though the reliability of the MI measurement was relatively high with both methods.
确定两种髋臼迁移指数（MI）测量方法在伴有或不伴有髋关节发育不良的脑瘫（CP）患者中的可靠性及临床应用价值。
材料包括200例脑瘫患儿髋关节的X线片。采用标准化方法，让患儿仰卧位拍摄骨盆常规前后位X线片。两名康复医生用两种方法测量迁移指数。经典方法中，以髋臼顶的外侧缘为标志；改良方法中，以眉弓的外侧缘为标志。每位评估者在至少间隔一周的三个不同时间测量迁移指数。采用组内相关系数（ICC）检验评估者间及评估者内的可靠性。
MI在经典方法和改良方法中均显示出良好的评估者内可靠性，但经典方法的评估者间可靠性高于改良方法。根据眉弓分类，正常眉弓类型的评估者间可靠性较高，发育不良眉弓类型的评估者间可靠性较低。
总体而言，经典方法比改良方法显示出更高的可靠性，尽管两种方法测量MI的可靠性都相对较高。
