Abstract
Objective To explore the latent class structure and heterogeneity of posttraumatic stress disorder(PTSD) in adolescent. Methods The Chinese PTSD Checklist-Civilian Version (PCL-C) was used to assess 560 adolescent from the Wenchuan earthquake area. Latent Class Model was employed to analyze the data. Results Latent Class Analysis revealed four classes of adolescent PTSD sample: pervasive disturbance (n=115, 20.5%), no disturbance (n=165, 29.5%), Intermediate Symptom with high Emotional Numbing (n=188, 33.6%), as well as Intermediate Symptom with low avoidance (n=92, 16.4%). The proportion of boys in each subsample were 55.7%, 49.7%, 50.5% and 50.4%, respectively. In addition, there was no significant gender difference of prevalence within each class (χ2=1.56, P=0.669). Conclusions Four-class model best fit the data for PTSD symptoms, and different clinical intervention should be adopted. Key words: PTSD; Latent class Model; Heterogeneity; Adolescent
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