Psychometric of the Persian version of Quality of Life in Late-Stage Dementia (QUALID) in the elderly with Alzheimer's disease.

IF 1.6 Q4 HEALTH CARE SCIENCES & SERVICES BMJ Open Quality Pub Date : 2024-07-04 DOI:10.1136/bmjoq-2023-002673

Zahra Amrollah Majdabadi Kohne, Abbas Ebadi, Mansoureh Ashghali-Farahani, Saleheh Tajali, Sahar Keyvanloo Shahrestanaki

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Abstract

Background: Improving the quality of life (QoL) is a significant healthcare priority, and it is an important health outcome for elderly individuals with Alzheimer's disease. Quality of Life in Late-Stage Dementia (QUALID) is a specific scale used to measure the QoL in elderly individuals with Alzheimer's. So far, limited quantitative research has been conducted on the psychometric properties of this scale.

Aims: This study was conducted to translate the QUALID Scale into Persian and evaluate its psychometric properties among family and professional caregivers of elderly individuals with Alzheimer's disease in Tehran.

Methods: A cross-sectional methodological study was conducted among family and professional caregivers of elderly individuals with Alzheimer's in Tehran, Iran in 2022. The questionnaire was translated into Persian using the forward-backward method. Face and content validity were assessed. Additionally, construct validity was examined using exploratory factor analysis (EFA) with Equamax rotation (n=210) and confirmatory factor analysis (CFA) (n=155). Cronbach's alpha and interclass correlation coefficient (ICC) were estimated to determine reliability.

Results: A total of 365 caregivers with a mean age of 14.18±42.60 years participated in this study. In the face and content validity phase, all 11 items were retained. To determine the construct validity, two factors were extracted in the EFA phase, including behavioural signs of discomfort and behavioural signs of social interaction. The findings of the CFA also indicated that all goodness of fit indices supported the final model. The Cronbach's alpha was excellent for both factors (0.814), and the ICC was calculated as 0.98.

Conclusion: Based on the findings of this study, it can be concluded that the Persian version of the QUALID Scale has sufficient validity and reliability for measuring the QoL in elderly Iranian individuals with Alzheimer's.

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老年痴呆症晚期患者生活质量（QUALID）波斯语版的心理测量。

背景：提高生活质量（QoL）是医疗保健的一个重要优先事项，也是老年痴呆症患者的一个重要健康结果。晚期痴呆症患者生活质量量表（QUALID）是用于测量阿尔茨海默氏症老年患者生活质量的特定量表。目的：本研究旨在将 QUALID 量表翻译成波斯语，并评估其在德黑兰老年痴呆症患者的家庭和专业护理人员中的心理测量特性：2022 年，在伊朗德黑兰的阿尔茨海默氏症患者家庭和专业护理人员中开展了一项横断面方法学研究。调查问卷采用向前向后法翻译成波斯语。对问卷的面效度和内容效度进行了评估。此外，还使用探索性因子分析（EFA）和均衡旋转法（Equamax rotation）（人数=210）以及确证性因子分析（CFA）（人数=155）对构建有效性进行了检验。对 Cronbach's alpha 和类间相关系数 (ICC) 进行了估计，以确定信度：共有 365 名护理人员参与了此次研究，他们的平均年龄为（14.18±42.60）岁。在面效和内容效度阶段，所有 11 个项目均被保留。为了确定建构效度，在 EFA 阶段提取了两个因子，包括不适的行为表现和社会交往的行为表现。CFA 的结果还表明，所有拟合优度指数都支持最终模型。两个因子的 Cronbach's alpha 均为 0.814，ICC 为 0.98：根据本研究的结果，可以认为波斯语版 QUALID 量表在测量伊朗老年痴呆症患者的 QoL 方面具有足够的有效性和可靠性。

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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