This systematic review assessed the psychometric properties and the cross-cultural adaptation of the University of California and Los Angeles Loneliness scale (UCLA-LS) in adults. A systematic search of four electronic databases (PubMed, EMBASE, Scopus, and PsycINFO) was conducted from inception until March 2021. We followed the Consensus-Based Standards for the Selection of Health Measurement Instruments (COSMIN) guidelines for data extraction and evidence synthesis. Eighty-one studies assessed the validity and reliability of the UCLA-LS, translated into many languages, and applied across several countries/societies. Three versions of the 20-item and nine short versions of the UCLA-LS with 3 to 20 questions were identified. High-quality evidence supported the internal structure of the UCLAs: 4, 6, 7 and 10, while low-to moderate-quality evidence supported the construct validity of the UCLAs: 3, 4, 6, 8, 16 and 20. Moderate-quality evidence supported the test-retest reliability of version 3 UCLA-20 with excellent interclass coefficients values of 0.76–0.93. The UCLAs: 4, 6, 7 and 10 had the most robust internal structure and may therefore be the most useful for informing clinicians and social psychologists engaged in assisting those with loneliness.

本系统综述评估了加州大学和洛杉矶分校孤独量表 (UCLA-LS) 的成人心理测量特性和跨文化适应能力。从成立到 2021 年 3 月，我们对四个电子数据库（PubMed、EMBASE、Scopus 和 PsycINFO）进行了系统检索。我们遵循健康测量仪器选择共识标准 (COSMIN) 指南进行数据提取和证据合成。八十一项研究评估了 UCLA-LS 的有效性和可靠性，这些研究被翻译成多种语言，并在多个国家/社会应用。确定了包含 20 个项目的 3 个版本和包含 3 至 20 个问题的 UCLA-LS 的 9 个简短版本。高质量证据支持 UCLA 的内部结构：4、6、7 和 10，而低到中等质量的证据支持 UCLA 的结构效度：3、4、6、8、16 和 20。质量证据支持 UCLA-20 版本 3 的重测可靠性，其类间系数值为 0.76-0.93。加州大学洛杉矶分校：4、6、7 和 10 具有最强大的内部结构，因此对于帮助那些孤独症患者的临床医生和社会心理学家来说可能是最有用的。