颈椎功能障碍指数量表的效度与信度研究

Validity and reliability of the neck disability index for cervical spondylopathy patients

目的:探讨颈椎功能障碍指数量表(NDI)的效度和信度,为临床应用提供客观依据。方法:两组受试对象参加了测试,一组为病例组(43例),另一组为对照组(20例)。两组对象在3d内独立完成NDI和视觉模拟评分法(VAS)评定2次,病例组同时用健康状况调查问卷(SF-36)评定。将NDI结果与VAS、SF-36作相关性检验来验证NDI的效度;对2次NDI结果作相关性分析来测试其重复测量信度。结果:两组受试对象的NDI总分和VAS评分高度相关,r=0.82-0.97(P<0.01);病例组NDI总分与SF-36各项目分值比较,除精神健康(MH)一项外,均中度相关r=-0.60—-0.78(P<0.01);两组受试对象的第一次和第二次NDI评定总积分和各项目积分间均高度相关,ICC=0.87—0.99(P<0.01);病例组和对照组NDI评分分别为37.2%±9.6%、4%±2.1%,两者间差异有显著性(P<0.01)。结论:NDI具有良好的效度和信度,可用于受试者的颈椎功能的评价。

Objective： To explore the validity and reliability of the Neck Disability Index （NDI） for cervical spondylopathy patients so as to provide evidence for clinical application. Method： Two groups of subjects participated in the study. Forty-three patients with cervical spondylopathy were in group one（patients group） and 20 healthy subjects were in the other group （control group）. They were assessed twice with NDI and visual analogue scale（VAS） within 3 days. In addition, the patients were also assessed with SF-36. Result： In both groups NDI was highly correlated with VAS in total score （r=0.82-0.97,P〈0.01）. NDI was moderate correlated with each item of SF-36 （r=-0.60— -0.78 ,P〈0.01）. There were high correlation in all items of NDI between the 1st and the 2nd assessment in both groups. The intraclass correlation coefficient （ICC） was 0.87-0.99 （P〈0.01）. The NDI scores in patients group were significantly higer than that in control group [（37.2±9.6）% vs （4±2.1）%, P〈0.01]. Conclusion： The NDI is valid and reliable when it is used to assess neck disability for cervical spondylopathy patients.