Division of Cardiology, Department of Medicine & Therapeutics, Chinese University of Hong Kong, Hong Kong, China.
Vasc Med. 2011 Jun;16(3):167-72. doi: 10.1177/1358863X11404934.
The Walking Impairment Questionnaire (WIQ) is a frequently used questionnaire to evaluate patients with intermittent claudication on four subscales: pain severity, walking distance, walking speed and the ability to climb stairs. The aim of this study is to translate and validate the WIQ in Chinese. After translation and cultural adaptation of the WIQ, 134 patients with intermittent claudication completed the Chinese WIQ and European Quality of Life 5 Dimension (EQ-5D). Walking distances were determined by the 6-minute walk test (6MWT). Correlations between the WIQ, quality of life questionnaire and walking distances were calculated to determine validity. Reliability and internal consistency were determined using the intra-class correlation coefficient (ICC) and Cronbach's alpha (α), respectively. Significant correlations were found between the WIQ score, initial claudication distance (ICD), absolute claudication distance (ACD) and all domains of the EQ-5D (all p ≤ 0.01). Test-retest reliability (ICC = 0.74) and the overall internal consistency determined (α = 0.90) showed good agreement. A lower WIQ score corresponded to shorter walking distances. In conclusion, this study showed that the Chinese version of the WIQ is a valid, reliable and clinically relevant instrument for assessing walking impairment in patients with intermittent claudication.
行走障碍问卷（WIQ）是一种常用于评估间歇性跛行患者的问卷，包括四个分量表：疼痛严重程度、行走距离、行走速度和爬楼梯能力。本研究旨在将 WIQ 翻译成中文并进行验证。WIQ 经过翻译和文化适应性调整后，134 名间歇性跛行患者完成了中文版 WIQ 和欧洲生活质量 5 维度（EQ-5D）问卷。行走距离通过 6 分钟步行测试（6MWT）确定。计算 WIQ 评分与生活质量问卷和行走距离之间的相关性，以确定其有效性。使用组内相关系数（ICC）和克朗巴赫α系数（α）分别确定可靠性和内部一致性。WIQ 评分与初始跛行距离（ICD）、绝对跛行距离（ACD）和 EQ-5D 的所有领域均呈显著相关（均 p≤0.01）。测试-重测可靠性（ICC=0.74）和总体内部一致性（α=0.90）显示出良好的一致性。WIQ 评分越低，行走距离越短。总之，本研究表明中文版 WIQ 是一种评估间歇性跛行患者行走障碍的有效、可靠且具有临床相关性的工具。
