Gelaye Bizu, Zhong Qiu-Yue, Barrios Yasmin V, Redline Susan, Drake Christopher L, Williams Michelle A
Department of Epidemiology, Harvard School of Public Health, Boston, MA.
Department of Medicine, Brigham and Women's Hospital, Boston, MA.
J Clin Sleep Med. 2016 Apr 15;12(4):579-87. doi: 10.5664/jcsm.5696.
To evaluate the construct validity and factor structure of the Spanish-language version of the Ford Insomnia Response to Stress Test questionnaire (FIRST-S) when used in early pregnancy.
A cohort of 647 women were interviewed at ≤ 16 weeks of gestation to collect information regarding lifestyle, demographic, and sleep characteristics. The factorial structure of the FIRST-S was tested through exploratory and confirmatory factor analyses (EFA and CFA). Internal consistency and construct validity were also assessed by evaluating the association between the FIRST-S with symptoms of depression, anxiety, and sleep quality. Item response theory (IRT) analyses were conducted to complement classical test theory (CTT) analytic approaches.
The mean score of the FIRST-S was 13.8 (range: 9-33). The results of the EFA showed that the FIRST-S contained a one-factor solution that accounted for 69.8% of the variance. The FIRST-S items showed good internal consistency (Cronbach α = 0.81). CFA results corroborated the one-factor structure finding from the EFA; and yielded measures indicating goodness of fit (comparative fit index of 0.902) and accuracy (root mean square error of approximation of 0.057). The FIRST-S had good construct validity as demonstrated by statistically significant associations of FIRST-S scores with sleep quality, antepartum depression and anxiety symptoms. Finally, results from IRT analyses suggested excellent item infit and outfit measures.
The FIRST-S was found to have good construct validity and internal consistency for assessing vulnerability to insomnia during early pregnancy.
评估西班牙语版福特失眠应激反应测试问卷（FIRST-S）在孕早期使用时的结构效度和因子结构。
对647名孕周≤16周的女性进行访谈，收集有关生活方式、人口统计学和睡眠特征的信息。通过探索性和验证性因子分析（EFA和CFA）对FIRST-S的因子结构进行测试。还通过评估FIRST-S与抑郁、焦虑症状及睡眠质量之间的关联来评估内部一致性和结构效度。进行项目反应理论（IRT）分析以补充经典测试理论（CTT）分析方法。
FIRST-S的平均得分为13.8（范围：9 - 33）。EFA结果表明，FIRST-S包含一个单因子解决方案，解释了69.8%的方差。FIRST-S各项目显示出良好的内部一致性（Cronbach α = 0.81）。CFA结果证实了EFA得出的单因子结构；并得出了表明拟合优度（比较拟合指数为0.902）和准确性（近似均方根误差为0.057）的测量值。FIRST-S具有良好的结构效度，FIRST-S得分与睡眠质量、产前抑郁和焦虑症状之间的统计学显著关联证明了这一点。最后，IRT分析结果表明项目内拟合和外拟合测量结果极佳。
发现FIRST-S在评估孕早期失眠易感性方面具有良好的结构效度和内部一致性。
