Psychometric Properties of the UCLA PTSD Reaction Index. Part II: Investigating Factor Structure Findings in a National Clinic-Referred Youth Sample

Authors

  • Jon D. Elhai,

    Corresponding author
    • Departments of Psychology and Psychiatry, University of Toledo, Toledo, Ohio, USA
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  • Christopher M. Layne,

    1. UCLA/Duke University National Center for Child Traumatic Stress, Los Angeles, California, USA
    2. Department of Psychiatry, University of California, Los Angeles, Los Angeles, California, USA
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  • Alan M. Steinberg,

    1. UCLA/Duke University National Center for Child Traumatic Stress, Los Angeles, California, USA
    2. Department of Psychiatry, University of California, Los Angeles, Los Angeles, California, USA
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  • Melissa J. Brymer,

    1. UCLA/Duke University National Center for Child Traumatic Stress, Los Angeles, California, USA
    2. Department of Psychiatry, University of California, Los Angeles, Los Angeles, California, USA
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  • Ernestine C. Briggs,

    1. UCLA/Duke University National Center for Child Traumatic Stress, Los Angeles, California, USA
    2. Department of Psychiatry, Duke University Medical Center, Durham, North Carolina, USA
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  • Sarah A. Ostrowski,

    1. Akron Children's Hospital, Akron, Ohio, USA
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  • Robert S. Pynoos

    1. UCLA/Duke University National Center for Child Traumatic Stress, Los Angeles, California, USA
    2. Department of Psychiatry, University of California, Los Angeles, Los Angeles, California, USA
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  • The work described in this study is funded through the Center for Mental Health Services (CMHS), Substance Abuse and Mental Health Services Administration (SAMHSA), U.S. Department of Health and Human Services (USDHHS) through a cooperative agreement (3U79SM054284-10S1) with the UCLA/Duke University National Center for Child Traumatic Stress. The views, policies, and opinions expressed are those of the authors and do not necessarily reflect those of CMHS, SAMHSA, or USDHHS. We acknowledge the centers within the NCTSN that have contributed data to the Core Data Set as well as the staff, children, youth, and families at NCTSN centers throughout the United States that have made this collaborative network possible. We also thank our colleagues and partners at CMHS/SAMHSA for their leadership and guidance.

Correspondence concerning this article should be addressed to Jon Elhai through his website: www.jon-elhai.com

Abstract

We examined the underlying factor structure of the UCLA PTSD Reaction Index (PTSD-RI) using data from 6,591 children/adolescents exposed to trauma, presenting for treatment at any of 54 National Child Traumatic Stress Network (NCTSN) centers. Using confirmatory factor analysis, we tested the 3-factor DSM-IV PTSD model, 2 separate 4-factor models (Dysphoria vs. Emotional Numbing) and a recently conceptualized 5-factor Dysphoric Arousal model. We found a slight, but significant advantage for the Dysphoria model over the Emotional Numbing model on the PTSD-RI, with a difference in Bayesian information criterion (BIC) values of 81 points. As with several recent studies of adult trauma victims, we found a slight advantage for the Dysphoric Arousal model over the other models on the PTSD-RI, with BIC differences exceeding 300 points. Retaining the Dysphoric Arousal model, we tested the convergent validity of the PTSD-RI factors against subscales of the Trauma Symptom Checklist for Children. Supporting the convergent validity of the PTSD-RI, in the Dysphoric Arousal model, the dysphoric arousal factor related most strongly to anger, whereas the emotional numbing factor related most strongly to depression, and anxious arousal factor related most strongly to anxiety. Results support the use of the PTSD-RI for evaluating PTSD among youth.

Traditional and Simplified Chinese Abstracts by AsianSTSS

標題:UCLA PTSD反應指數的心理測量特徵的第二部份:全國診所轉介青少年樣本因子結構的調查結果。

撮要:從54個全國兒童創傷壓力網絡中心(NCTSN)中的一個中心內,6591位求診受創兒童中測試UCLA PTSD反應指數(PTSD-RI)的因子結構。使用驗証因子分析,我們測試3―因子DSM-IV PTSD模型,2個不同的4―因子模型(煩燥VS.情感麻木),和最近構想的5―因子煩燥激發模型。煩燥模型輕微但統計上有效地勝過情感麻木模型(在PTSD―RI),而貝葉斯信息准則(BIC)值差為81點。本研究與近年多個成人受創者研究一致地顯示煩燥激發模型比其他PTSD-RI的模型有輕微優勝處而BIC值差是多於300點子。保留煩燥激發模型來測定PTSD-RI因子對比兒童創傷症狀清單副量表的滙聚效力,支援PTSD-RI的滙聚效力,「煩燥激發」因子與憤怒有強大關係,情感麻木因子則與抑鬱有最強關連,而焦慮激發因子和焦慮有最強關係。結果支持在少年中使用PTSD-RI來評估PTSD。

标题:UCLA PTSD反应指数的心理测量特征的第二部份:全国诊所转介青少年样本因子结构的调查结果。

撮要:从54个全国儿童创伤压力网络中心(NCTSN)中的一个中心内,6591位求诊受创儿童中测试UCLA PTSD反应指数(PTSD-RI)的因子结构。使用验证因子分析,我们测试3―因子DSM-IV PTSD模型,2个不同的4―因子模型(烦燥VS.情感麻木),和最近构想的5―因子烦燥激发模型。烦燥模型轻微但统计上有效地胜过情感麻木模型(在PTSD―RI),而贝叶斯信息准则(BIC)值差为81点。本研究与近年多个成人受创者研究一致地显示烦燥激发模型比其他PTSD-RI的模型有轻微优胜处而BIC值差是多于300点子。保留烦燥激发模型来测定PTSD-RI因子对比儿童创伤症状清单副量表的汇聚效力,支持PTSD-RI的汇聚效力,「烦燥激发」因子与愤怒有强大关系,情感麻木因子则与抑郁有最强关连,而焦虑激发因子和焦虑有最强关系。结果支持在少年人中使用PTSD-RI来评估PTSD。

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