BACKGROUND The number of informal caregivers within ageing population is increasing and there is a growing research interest to promote their well-being, and therefore there is a need for adequate measurement tools. We aim to provide validity evidence of the Satisfaction with Life Scale (SWLS) in a representative sample of British older adults, including measurement invariance across caregivers and non-caregivers. METHOD Data was drawn from English Longitudinal Study of Ageing (ELSA). The sample consisted of 3,754 caregivers and 4,036 non-caregivers. The structure and measurement invariance were tested through a confirmatory factor analysis. Reliability and validity evidence based on relationships with other variables were also analysed. RESULTS Our results supported the one-factor structure of the SWLS, CFI = .996; NNFI = .993; RMSEA = 0.081, and measurement invariance across caregiving status. McDonald´s omega was .93. Scores on the SWLS were positively correlated with quality of life, positive social support, and self-reported health, and negatively with loneliness, depression, negative social support, difficulties in activities and instrumental activities of daily living, and number of health conditions. CONCLUSIONS These findings provide new psychometric evidence to support the use of the SWLS in research which focuses on caregivers and on the comparison with non-caregiver samples.

中文翻译：

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非正式照顾者对生活量表满意度的测量不变性和有效性。

背景技术老龄化人口中非正式照料者的数量正在增加，促进他们福祉的研究兴趣也在不断增长，因此需要适当的测量工具。我们的目标是在英国老年人的代表性样本中提供生活满意度量表 (SWLS) 的有效性证据，包括照顾者和非照顾者之间的测量不变性。方法 数据来自英国老龄化纵向研究 (ELSA)。样本包括 3,754 名护理人员和 4,036 名非护理人员。通过验证性因子分析测试结构和测量不变性。还分析了基于与其他变量关系的可靠性和有效性证据。结果 我们的结果支持 SWLS 的单因素结构，CFI = .996；NNFI = .993; RMSEA = 0.081，和跨看护状态的测量不变性。麦当劳的欧米茄是 0.93。SWLS得分与生活质量、积极的社会支持和自我报告的健康呈正相关，与孤独、抑郁、消极的社会支持、日常生活中的活动和工具性活动困难以及健康状况的数量呈负相关。结论 这些发现提供了新的心理测量学证据，支持在关注照顾者和与非照顾者样本比较的研究中使用 SWLS。日常生活活动和工具性活动的困难，以及健康状况的数量。结论 这些发现提供了新的心理测量学证据，支持在关注照顾者和与非照顾者样本比较的研究中使用 SWLS。日常生活活动和工具性活动的困难，以及健康状况的数量。结论 这些发现提供了新的心理测量学证据，支持在关注照顾者和与非照顾者样本比较的研究中使用 SWLS。