Development of a brief measure to assess quality of life in obesity
Development of a brief measure to assess quality of life in obesity
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DOI：
10.1038/oby.2001.13
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发表时间：
2001-02-01
期刊：
影响因子：
--
通讯作者：
Williams, GR
中科院分区：
文献类型：
--
作者：
Kolotkin, RL;Crosby, RD;Williams, GR
目的：肥胖研究人员对测量体重和减肥对生活质量的影响越来越感兴趣。体重对生活质量的影响问卷（IWQOL）是第一个专门评估肥胖对生活质量影响的自我报告工具。虽然IWQOL表现出了出色的心理测量特性，但其长度（74项）使其在临床研究中作为结果测量有些麻烦。本报告描述了IWQOL的31项版本（IWQOL- lite）的开发。研究方法与步骤：采用996例肥胖患者和对照组的iwqol - life量表编制iwqol - life。IWQOL-Lite的心理测量特性在991例患者和对照组的单独交叉验证样本中进行了检验。结果：验证性因子分析为量表结构的充分性提供了有力支持。iwqol - Life的五个量表（身体功能、自尊、性生活、公共压力和工作）和iwqol - Life总分显示出良好的心理测量特性。IWQOL-Lite量表的信度范围为0.90 ~ 0.94，总分为0.96。IWQOL-Lite与附属测量之间的相关性支持了IWQOL-Lite的结构效度。IWQOL-Lite量表随时间的变化与体重变化显著相关，支持其对变化的敏感性。在体重指数不同的组中，IWQOL-Lite量表和总分存在显著差异，支持IWQOL-Lite在体重指数谱中的实用性。讨论：IWQOL-Lite似乎是一种心理计量学上合理且临床敏感的肥胖症患者生活质量的简短测量方法。
Objective: Obesity researchers have a growing interest in measuring the impact of weight and weight reduction on quality of life. The Impact of Weight on Quality of Life questionnaire (IWQOL) was the first self-report instrument specifically developed to assess the effect of obesity on quality of life. Although the IWQOL has demonstrated excellent psychometric properties, its length (74 items) makes it somewhat cumbersome as an outcome measure in clinical research. This report describes the development of a 31-item version of the IWQOL (IWQOL-Lite).Research Methods and Procedures: IWQOLs from 996 obese patients and controls were used to develop the IWQOL-Lite. Psychometric properties of the IWQOL-Lite were examined in a separate cross-validation sample of 991 patients and controls.Results: Confirmatory factor analysis provided strong support for the adequacy of the scale structure. The five identified scales of the IWQOL-Lite (Physical Function, Self-Esteem, Sexual Life, Public Distress, and Work) and the total IWQOL-Lite score demonstrated excellent psychometric properties. The reliability of the IWQOL-Lite scales ranged from 0.90 to 0.94 and was 0.96 for the total score. Correlations between the IWQOL-Lite and collateral measures supported the construct validity of the IWQOL-Lite. Changes in IWQOL-Lite scales over time correlated significantly with changes in weight, supporting its sensitivity to change, Significant differences in IWQOL-Lite scale and total scores were found among groups differing in body mass index, supporting the utility of the IWQOL-Lite across the body mass index spectrum.Discussion: The IWQOL-Lite appears to be a psychometrically sound and clinically sensitive brief measure of quality of life in obese persons.