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短表8（SF-8）是一种广泛使用的测量健康相关生活质量（HRQOL）的仪器。本研究的目的是利用中国大陆城市居民的代表性样本，评估中文版SF-8的可靠性和有效性。我们对中国35个主要城市的居民进行了随机数字拨号调查。采用多阶段分层抽样方法，选取10885名成人作为概率样本。采用项目总相关和Cronbach阿尔法评价SF-8的内部一致性可靠性。采用因子分析法评价结构效度。根据已知的年龄、性别、收入和总体生活质量的生活质量差异，对已知人群的有效性进行检查。结果表明，SF-8具有很好的内部一致性、可靠性和已知的群体效度。我们的研究结果也证实了中国城市居民传统的2因子结构SF-8（身心健康）是合理的。此外，我们还发现一个3因素模型（生理、心理和整体健康）比传统的2因素模型更适合数据。本研究首次利用中国的一个具有代表性的大样本来确定SF-8的传统2因子结构。我们已经证明，SF-8中文版是可行的、可靠的、有效的。我们的研究结果支持使用SF-8总结评分来评估中国人的总体生活质量。未来的研究可能会进一步探索中国人口中SF-8的3因子结构的可能性。
The Short Form-8 （SF-8） is a widely used instrument for measuring health-related quality of life （HRQOL）. The purpose of the current study is to evaluate the reliability and validity of the Chinese version SF-8 using a large，representative sample of city residents in mainland China. We surveyed residents of 35 major cities in China using random digit dialing of both landlines and cell phones. We adopted a multi-stage stratified sampling scheme and selected a probability sample of 10，885 adults. Internal consistency reliability of the SF-8 was evaluated with item-total correlations and Cronbach’s alphas. Construct validity was assessed with factor analysis. Known-groups validity was examined based on known HRQOL differences in age，gender，income，and overall quality of life. We showed that SF-8 has very good internal consistency reliability and known-groups validity. Our results also confirmed that the traditional 2-factor structure of SF-8 （physical and mental health） is reasonable among Chinese city residents. Further，we showed that a 3-factor model （physical，mental，and overall health） fit the data better than the traditional 2-factor model. This study is the first to confirm the traditional 2-factor structure of SF-8 using a large，representative sample from China. We have shown that the SF-8 Chinese version is feasible，reliable，and valid. Our findings support the use of the SF-8 summary scores for assessing general HRQOL among Chinese. Future studies may further explore the possibility of a 3-factor structure for the SF-8 among the Chinese population.
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