@article{ref1,
title="Longitudinal invariance of posttraumatic stress disorder symptoms in adolescent earthquake survivors",
journal="Journal of anxiety disorders",
year="2011",
author="Wang, Mengcheng and Elhai, Jon D. and Dai, Xiaoyang and Yao, Shuqiao",
volume="26",
number="2",
pages="263-270",
abstract="The present study examined the invariance of four models of posttraumatic stress disorder symptoms (PTSD) across time through an analysis of symptom ratings from the PTSD Checklist-Civilian version. Participants included 403 junior middle school students recruited from Sichuan, China at 5 and 11 months after the 2008 Sichuan earthquake. Confirmatory factor analysis using measurement and structural invariance testing found that four tested models were non-invariant (i.e., different) over time on PTSD's variable intercepts (indicating symptom severity) and residual error variances, but were invariant on PTSD's factor loadings and structural parameters. The two 4-factor intercorrelated models and the newly proposed 5-factor model were superior to the model defined in DSM-IV; however, the best fitting model was the newest proposed 5-factor model. These findings extend our understanding of PTSD's factor structure that the factor structure may be quite stable over time.<p /> <p>Language: en</p>",
language="en",
issn="0887-6185",
doi="10.1016/j.janxdis.2011.12.009",
url="http://dx.doi.org/10.1016/j.janxdis.2011.12.009"
}