Department of Psychology, Faculty of Psychology, Rovira and Virgili University, C/ del Escorxador s/n, 43003, Tarragona, Spain.
Department of Clinical Psychology and Psychobiology, Faculty of Psychology, University of Barcelona, Passeig de la Vall d'Hebron, 171, 08035, Barcelona, Spain.
Qual Life Res. 2019 May;28(5):1255-1264. doi: 10.1007/s11136-019-02106-y. Epub 2019 Jan 14.
The purpose of this study was to assess the psychometric properties of the Satisfaction with Life Scale (SWLS), evaluate the measurement invariance with respect to sex, age, and tumor location, as well as analyze associations between life satisfaction and socio-demographic and clinical variables among individuals with resected, non-advanced cancer.
A confirmatory factor analysis was conducted to explore the dimensionality of the scale and test invariance across gender, age, and tumor localization in a prospective, multicenter cohort of 713 patients who completed the following scales: SWLS, Health-related Quality of Life Questionnaire (EORTC QLQ-C30), Brief Symptom Inventory (BSI-18).
Confirmatory factor analysis results indicated that the SWLS is an essentially unidimensional instrument, providing accurate scores: both McDonald's omega and Cronbach's alpha estimates were 0.91. Strong measurement invariance was found to hold across gender, age, and tumor localization. Low satisfaction with life was associated with psychological symptoms (anxiety, depression, and somatization), and decreased quality of life (malfunction, symptoms, poor global QoL).
The SWLS is a reliable, valid satisfaction with life measurement among people with cancer and should be recommended as an indicator of psychological adjustment in oncological patients.
本研究旨在评估生活满意度量表（SWLS）的心理测量特性，评估其在性别、年龄和肿瘤位置方面的测量不变性，并分析生活满意度与社会人口学和临床变量之间的关系，这些个体均为接受过切除、非晚期癌症治疗的患者。
采用验证性因子分析方法，对 713 例患者进行前瞻性、多中心队列研究，这些患者完成了以下量表：SWLS、欧洲癌症研究与治疗组织生活质量问卷核心 30 项（EORTC QLQ-C30）、简明症状量表（BSI-18），以探讨量表的维度和性别、年龄和肿瘤定位的测量不变性。
验证性因子分析结果表明，SWLS 是一个基本的单维度工具，提供了准确的分数：麦克唐纳 omega 和克朗巴赫 alpha 估计值均为 0.91。发现跨性别、年龄和肿瘤定位的测量不变性很强。对生活的低满意度与心理症状（焦虑、抑郁和躯体化）和生活质量下降（功能障碍、症状、整体生活质量差）有关。
SWLS 是癌症患者生活满意度的可靠、有效的测量工具，应作为肿瘤患者心理调整的指标推荐使用。
