Responsiveness of the German version of the Neck Disability Index in chronic neck pain patients: a prospective cohort study with a seven-week follow-up.

IF 2.1 Q1 REHABILITATION Archives of physiotherapy Pub Date : 2022-10-17 DOI:10.1186/s40945-022-00149-y

Anke Langenfeld, Antonia Pia Gassner, Brigitte Wirth, Malin Beth Mühlemann, Luana Nyirö, Caroline Bastiaenen, Jaap Swanenburg

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Abstract

Background: The need for an efficient and feasible strategy to deal with neck pain has a high priority for many countries. Validated assessment tools like the Neck Disability Index (NDI) to evaluate the functional status of a neck pain patient are urgently needed to treat and to follow-up patients purposefully. A German version (NDI-G) was shown to be valid and reliable, but has so far not been tested for responsiveness. The aim of this study was to evaluate the NDI-G`s responsiveness.

Methods: This was a prospective cohort study with a seven-week follow-up. Fifty chronic neck pain patients filled out NDI-G twice. Additionally, the Patients' Global Impression of Change score (PGIC) was assessed at follow-up. Wilcoxon and Spearman tests were used to assess direction and strength of the association between the change in NDI-G and PGIC. The receiver operating characteristics method and the area under the curve (AUC) were calculated to assess sensitivity and specificity of the NDI-G change over time.

Results: The Wilcoxon test showed statistically significant differences for NDI-G at baseline and follow-up in the total sample, the "clinically improved" and "clinically not improved" subgroups as indicated in the PGIC. Spearman test resulted in a moderate correlation between the NDI-G and the PGIC (r_S = -0.53, p = 0.01) at follow-up. AUC showed an acceptable discrimination [AUC = 0.78 (95% confidence interval 0.64 - 0.91)] of the NDI-G, with a cutoff score of 1.5, between clinically improved and clinically not improved patients, based on the PGIC.

Conclusions: The NDI-G is responsive to change in chronic neck pain. Together with the results of a previous study on its validity and reliability, the NDI-G can be recommended for research and clinical settings in patients with neck pain in German speaking countries.

Trial registration: NCT02676141. February 8, 2016.

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慢性颈部疼痛患者德语版颈部残疾指数的反应性:一项为期七周的前瞻性队列研究。

背景:需要一个有效和可行的策略来处理颈部疼痛是许多国家的高度优先事项。迫切需要像颈部残疾指数(NDI)这样经过验证的评估工具来评估颈部疼痛患者的功能状态，以便有目的地治疗和随访患者。一个德国版本(NDI-G)被证明是有效和可靠的，但迄今为止还没有测试过响应性。本研究的目的是评估NDI-G的反应性。方法:这是一项前瞻性队列研究，随访7周。50例慢性颈痛患者填写了两次NDI-G。此外，在随访中评估患者的整体变化印象评分(PGIC)。使用Wilcoxon和Spearman检验来评估NDI-G和PGIC变化之间关联的方向和强度。计算受试者工作特征法和曲线下面积(AUC)，评估NDI-G随时间变化的敏感性和特异性。结果:Wilcoxon检验显示，在基线和随访时，总样本、PGIC所示的“临床改善”和“临床未改善”亚组的NDI-G差异具有统计学意义。Spearman检验结果显示随访时NDI-G与PGIC呈正相关(rS = -0.53, p = 0.01)。基于PGIC, NDI-G在临床改善和临床未改善患者之间的AUC表现出可接受的区分[AUC = 0.78(95%可信区间0.64 - 0.91)]，截止评分为1.5。结论:NDI-G对慢性颈部疼痛的变化有反应。结合先前对其有效性和可靠性的研究结果，NDI-G可推荐用于德语国家颈部疼痛患者的研究和临床设置。试验注册:NCT02676141。2016年2月8日。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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