title: Psychometric properties of the UCLA PTSD reaction index: part I.
abstract: This article presents psychometric characteristics of the UCLA PTSD Reaction Index for DSM IV (PTSD-RI) derived from a large sample of children and adolescents (N = 6,291) evaluated at National Child Traumatic Stress Network centers. Overall mean total PTSD-RI score for girls was significantly higher as compared with boys. Age-related differences were found in that overall mean total PTSD-RI scores and within sex groups were higher among those aged 7-9 years and 16-18 years. There were no significant differences in mean total PTSD-RI scores across racial/ethnic groups. The PTSD-RI total scale displayed good to excellent internal consistency reliability across age ranges, sex, and racial/ethnic groups (α = .88-.91). Correlations of PTSD-RI scores with PTS subscale scores on the TSCC-A for the entire sample and within sex, age, and ethnic/racial groups provided evidence of convergent validity, although not discriminant validity. In contradistinction to previously reported 4-factor models, an exploratory factor analysis revealed 3 factors that mostly reflected the underlying dimensions of PTSD in DSM IV. PTSD-RI scores were associated with increased odds ratios for functional/behavior problems (odds ratio [OR] = 1-1.80). These findings are striking in light of the wide range of trauma exposures, age, and race/ethnicity among subjects.
authors: Department of Psychiatry and Biobehavioral Sciences, UCLA/Duke University National Center for Child Traumatic Stress, University of California, Los Angeles, CA 90064, USA.
authors: Alan M
authors: AM
authors: Steinberg
authors: Melissa J
authors: MJ
authors: Brymer
authors: Soeun
authors: S
authors: Kim
authors: Ernestine C
authors: EC
authors: Briggs
authors: Chandra Ghosh
authors: CG
authors: Ippen
authors: Sarah A
authors: SA
authors: Ostrowski
authors: Kevin J
authors: KJ
authors: Gully
authors: Robert S
authors: RS
authors: Pynoos
mesh_terms: D000293:Adolescent; D000367:Age Factors; D000786:Anger; D001008:Anxiety Disorders / Q000175:diagnosis / Q000453:epidemiology / Q000523:psychology; D002648:Child; D002653:Child Behavior Disorders / Q000175:diagnosis / Q000453:epidemiology / Q000523:psychology; D015897:Comorbidity; D019955:Conduct Disorder / Q000175:diagnosis / Q000453:epidemiology / Q000523:psychology; D003430:Cross-Sectional Studies; D003866:Depressive Disorder / Q000175:diagnosis / Q000453:epidemiology / Q000523:psychology; D039721:Diagnostic and Statistical Manual of Mental Disorders; D004213:Dissociative Disorders / Q000175:diagnosis / Q000453:epidemiology / Q000523:psychology; D005260:Female; D006801:Humans; D008016:Life Change Events; D008297:Male; D010552:Personality Assessment / Q000706:statistics & numerical data*; D011594:Psychometrics / Q000706:statistics & numerical data*; D012737:Sex Factors; D012920:Social Behavior Disorders / Q000175:diagnosis / Q000453:epidemiology / Q000523:psychology; D013223:Statistics as Topic; D013313:Stress Disorders, Post-Traumatic / Q000175:diagnosis* / Q000453:epidemiology / Q000523:psychology; D011795:Surveys and Questionnaires; D014481:United States