The child and Adolescent Trauma Screen 2 (CATS-2) - validation of an instrument to measure DSM-5 and ICD-11 PTSD and complex PTSD in children and adolescents.

As the AIC and BIC declined with addition of every new class and BLRT was highly significant up to 5 classes we followed the recommendations of Asparouhov and Muthén ( 2015 ) and calculated multivariate normal mixture models, where we allowed the continuous variables to correlate within class.

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