Factor structure of the Impact of Event Scale-Revised in two different Peruvian samples.
BACKGROUND
This article studied the factor structure of the Impact of Event Scale-Revised (IES-R) in two samples in Peru, i.e., a sample of survivors of a fire (N=174) and a university student sample (N=562).


METHODS
First, confirmatory factor analysis was used to compare nine different models of posttraumatic stress disorder symptoms as evaluated by the IES-R in both of the samples separately. The model with the best fit in both samples had four correlated factors, i.e., Intrusion, Avoidance, Hyperarousal and Sleep Disturbance. Second, the degree of factorial invariance of the IES-R was compared in both the samples using multiple group confirmatory factor analysis.


CONCLUSIONS
The results showed almost no differences between both samples. Finally, the results supported the internal consistency, as well as the concurrent and convergent validity of the IES-R in Peru.
Gargurevich
Rafael
R
Research Group for Psychotherapy and Psychodynamic Psychology, Department of Psychology, Katholieke Universiteit Leuven, Leuven, Belgium. rafael.gargurevich@psy.kuleuven.be
Luyten
Patrick
P
Fils
Jean-Francois
JF
Corveleyn
Jozef
J
D000293:Adolescent; D000328:Adult; D003431:Cross-Cultural Comparison; D039721:Diagnostic and Statistical Manual of Mental Disorders; D004522:Educational Status; D005107:Explosions; D005163:Factor Analysis, Statistical; D005260:Female; D005390:Fires; D006801:Humans; D008016:Life Change Events; D008297:Male; D010555:Personality Inventory / Q000706:statistics & numerical data*; D010568:Peru; D011203:Poverty / Q000523:psychology; D011594:Psychometrics / Q000706:statistics & numerical data; D012016:Reference Values; D015203:Reproducibility of Results; D012944:Social Support; D013313:Stress Disorders, Post-Traumatic / Q000175:diagnosis* / Q000208:ethnology / Q000523:psychology; D017741:Survivors / Q000523:psychology*; D014175:Translating; D055815:Young Adult