青少年特发性脊柱侧凸校正身高的测算方法比较及可行性分析

Comparison of Three Methods Used for Calculation of Corrected Body Height in Adolescent Idiopathic Scoliosis

目的比较青少年特发性脊柱侧凸校正身高的三种测算方法,评价方法的准确性和可重复性。方法选取30例青少年特发性脊柱侧凸患者脊柱全长正位片,测量并记录患者侧凸角度,采用手工测量、计算机辅助测量、Bjure公式的方法测算校正身高,比较三种方法测量结果的准确性。由同一医师应用计算机辅助测量方法对间隔4周的两次测算结果作比较,分析同一观察者在不同时间的可重复性,对3名医生各自应用计算机辅助测量方法的测算结果作比较,分析该方法不同观察者间的可重复性。结果手工测量组和计算机辅助测量组测算校正身高比较差异无统计学意义,手工测量组和Bjure公式组、计算机辅助测量组和Bjure公式组测算校正身高,组间比较差异均有统计学意义(P<0.05)。计算机辅助测量方法测算校正身高同一观察者不同时间的组内相关系数为0.998,不同观察者间的组内相关系数为0.977。结论计算机辅助测量方法测算校正身高较传统的手工测量方法操作简单,准确性和可重复性均较好。

Objective To evaluate the accurancy and reliability of a measurement method of corrected body height by comparing three methods in adolescent idiopathic scoliosis. Methods Digital photos of standing a-p radiographs of the spine were obtained from 30 patients with adolescent idiopathic scoliosis under the same condition.Cobb’s angle was measured and documented.the corrected body height can be calculated using manual measurement method,computer-aided measurement method and Bjure equation respectively.In order to assess the accuracy of the computer-aided measurement method,results of the means and standard deviations which calculated using three methods were compared between the three groups.And to compare intra-observer reliability,measurements were carried out two times on two different occasions by the same orthopaedist.The interval between measurements was four weeks.Three orthopaedists performed the measurements independently in order to compare inter-observer reliability. Results There were no difference between the results of corrected body height caculated by manual measurement method and computer-aided measurement method.The results of corrected body height which caculated by methods of manual measurement method and computer-aided measurement method were all different significantly in comparison with the Bjure equation （ P 〈0.05）.Intraclass correlations for intraobserver and interobserver agreements in the computer-aided measurement method of corrected body height were 0.998 and 0.977 respectively. Conclusion Compared to the manual measurement method,the computer-aided measurement method of calculation of corrected body height in adolescent idiopathic scoliosis is simple,accurate and reliable.