Mplus ESEM code testing factor structure and longitudinal measurement invariance of PHQ-9 for specialist mental health care patients with persistent major depressive disorder

The files are Mplus code used to perform ESEM models presented in paper "Factor structure and longitudinal measurement invariance of PHQ-9 for specialist mental health care patients with persistent major depressive disorder: Exploratory Structural Equation Modelling", submitted to Journal of Affective Disorders (2017)