School of Pharmaceutical Science and Technology, Tianjin University, Tianjin, China.
Center for Social Science Survey and Data, Tianjin University, Tianjin, China.
Health Qual Life Outcomes. 2024 Nov 5;22(1):96. doi: 10.1186/s12955-024-02313-3.
To evaluate measurement properties of the Impact of Weight on Quality of Life-Lite (IWQOL-Lite) instrument among Chinese overweight and obese populations.
A representative sample of Chinese overweight and obese populations was recruited stratified by age, sex, residence and body mass index (BMI). Social-demographic characteristics, self-reported EQ-5D-5 L and IWQOL-Lite responses were collected through the online survey. Test-retest reliability was assessed using intraclass correlation coefficient (ICC) among a subgroup of the total sample. Structural validity was evaluated by confirmatory factor analysis (CFA). Convergent validity and known-group validity were examined using Spearman's rank correlation and effect sizes, respectively.
A total of 1000 respondents (48% female; mean age: 51.7 years; mean BMI: 27.4) were included in this study. Ceiling and floor effects of the IWQOL-Lite were 5.4% and 0.67%, respectively. The ICC between the two tests was 0.992 for IWQOL-Lite among the subgroup (N = 150). The results of the CFA suggested that the five-factor model had an acceptable structural validity (GFI = 0.894, CFI = 0.960, TLI = 0.957, RMSEA = 0.054 and SRMR = 0.033). The Spearman's rank correlation (range: 0.413-0.611) indicated a satisfactory convergent validity. The effect sizes values of IWQOL-Lite total score and different dimensions were moderate.
The IWQOL-Lite has been demonstrated to have satisfactory validity and reliability in measuring the HRQoL of Chinese overweight and obese populations. Further research is needed to confirm the sensitivity and responsiveness.
评估影响生活质量轻量表（IWQOL-Lite）在中国超重和肥胖人群中的测量特性。
采用分层抽样的方法，按照年龄、性别、居住地和体重指数（BMI）对中国超重和肥胖人群进行代表性抽样。通过在线调查收集社会人口统计学特征、自我报告的 EQ-5D-5L 和 IWQOL-Lite 反应。对总样本的一个亚组进行了组内相关系数（ICC）评估测试-重测信度。通过验证性因素分析（CFA）评估结构效度。使用 Spearman 秩相关和效应量分别检验收敛效度和已知组有效性。
共纳入 1000 名受访者（48%为女性；平均年龄：51.7 岁；平均 BMI：27.4）。IWQOL-Lite 的天花板和地板效应分别为 5.4%和 0.67%。亚组（N=150）中 IWQOL-Lite 的 ICC 为 0.992。CFA 的结果表明，五因素模型具有可接受的结构效度（GFI=0.894，CFI=0.960，TLI=0.957，RMSEA=0.054，SRMR=0.033）。Spearman 秩相关（范围：0.413-0.611）表明具有较好的收敛效度。IWQOL-Lite 总分和不同维度的效应量值为中等。
IWQOL-Lite 在中国超重和肥胖人群中测量 HRQoL 具有较好的有效性和可靠性。需要进一步研究以确认其敏感性和反应度。
