School of Health Sciences, Physiotherapy, HES-SO Valais-Wallis, Rathausstrasse 25, 3954, Leukerbad, Switzerland.
Institut Notre-Dame de Lourdes, 3960, Sierre, Switzerland.
Health Qual Life Outcomes. 2022 Mar 9;20(1):43. doi: 10.1186/s12955-022-01950-w.
The proportion of the world population aged over 65 years is increasing in the world population. Quality of life is an important factor in the biopsychosocial management of older patients. The Older People's Quality of Life-35 (OPQOL-35) questionnaire was developed specifically for assessment of the quality of life of older people. The aim of this study is to evaluate the psychometric properties of a Swiss French version of the OPQOL-35 questionnaire (OPQOL-35-SF).
Forward-backward procedure was used to translate the original questionnaire from English into Swiss French. A sample of older people then completed the questionnaire. Construct validity of the OPQOL-35-SF was evaluated by comparing the results with those from three other questionnaires [World Health Organisation Quality of Life in older people questionnaire (WHOQOL-OLD), Control, Autonomy, Self-realization, Pleasure in 12 questions (CASP-12), and EuroQol-5-dimensions-5-levels (EQ-5D-5L)] and two visual analogue scales (health and quality of life). The structure of the OPQOL-35-SF questionnaire was assessed using exploratory and confirmatory factor analysis. To evaluate the reliability the OPQOL-35-SF questionnaire was completed a second time after 7-23 days.
A total of 264 older people completed all the questionnaires at the first session, and 262 completed the OPQOL-35-SF again at the second session. Mean age of participants was 76.8 (standard deviation (SD) = 7.1) years. The majority of participants were women (73.9%). The Kaiser-Meyer-Olkin Measure of Sampling Adequacy (KMO) was 0.86 and Bartlett's test of sphericity was significant (p < 0.001). The result of Exploratory Factor Analysis (EFA) revealed 8 factors with eigenvalues greater than one, which explained 58% of the observed variance. All items had an acceptable loading (< 0.30) in at least one factor. The convergent validity presented low to moderate correlations (rho: 0.384-0.663). Internal consistency was good (Cronbach's alpha 0.875 for test and 0.902 for retest). Test-retest reliability presented an intra-class correlation coefficient, two-way random effects, absolute agreement, single rater (ICC) of 0.83 [95% confidence interval (CI) 0.78-0.87].
The Swiss French version of the OPQOL-35 questionnaire shows good psychometric properties, which permit its use in clinical practice or research. A supplementary sample would be necessary for a better distribution of the items in the different factors.
世界人口中 65 岁以上人口的比例正在增加。生活质量是老年患者生物心理社会管理的一个重要因素。老年人生活质量问卷-35 项（OPQOL-35）专为评估老年人的生活质量而开发。本研究的目的是评估瑞士法语版 OPQOL-35 问卷（OPQOL-35-SF）的心理测量特性。
采用前后翻译法将原始问卷从英语翻译成瑞士法语。然后，一组老年人完成了问卷。通过将结果与其他三个问卷[世界卫生组织老年人生活质量问卷（WHOQOL-OLD）、控制、自主、自我实现、12 个问题的快乐（CASP-12）和 EuroQol-5 维度-5 水平（EQ-5D-5L）]和两个视觉模拟量表（健康和生活质量）进行比较，评估了 OPQOL-35-SF 的结构效度。使用探索性和验证性因子分析评估 OPQOL-35-SF 问卷的结构。为了评估可靠性，在 7-23 天后再次完成 OPQOL-35-SF 问卷。
共有 264 名老年人在第一次会议上完成了所有问卷，262 名老年人在第二次会议上再次完成了 OPQOL-35-SF 问卷。参与者的平均年龄为 76.8（标准差（SD）=7.1）岁。大多数参与者为女性（73.9%）。Kaiser-Meyer-Olkin 抽样充分性度量（KMO）为 0.86，Bartlett 球形检验显著（p<0.001）。探索性因子分析（EFA）的结果显示，有 8 个特征值大于 1的因子，这些因子解释了 58%的观察到的方差。所有项目在至少一个因子中均具有可接受的负荷（<0.30）。收敛效度表现出低至中度的相关性（rho：0.384-0.663）。内部一致性良好（测试的 Cronbach's alpha 为 0.875，重测的 Cronbach's alpha 为 0.902）。测试-重测信度表现出 0.83 的组内相关系数，双向随机效应，绝对一致性，单个评分者（ICC）（95%置信区间（CI）0.78-0.87）。
瑞士法语版 OPQOL-35 问卷具有良好的心理测量特性，可在临床实践或研究中使用。需要更多的补充样本，以便在不同的因素中更好地分配项目。
