RT Journal Article T1 Long-term depressive symptoms trajectories following CBT delivered in primary care compared to usual treatment A1 Prieto Vila, Maider A1 González Blanch, César A1 Saunders, Rob A1 Buckman, Joshua E. J. A1 Muñoz Navarro, Roger A1 Esteller Collado, Gabriel A1 Barrio Martínez, Sara A1 Moriana, Juan A. A1 Ruiz Rodríguez, Paloma A1 Carpallo González, María A1 Cano Vindel, Antonio Rafael AB BackgroundThe course of depression is heterogeneous. The employed treatment is a key element in the impact of the course of depression over the time. However, there is currently a gap of knowledge about the trajectories per treatment and related baseline factors. We aimed to identify trajectories of depressive symptoms and associated baseline characteristics for two treatment arms in a randomized clinical trial: treatment as usual (TAU) or TAU plus transdiagnostic group cognitive behavioral therapy (TAU + TDG-CBT).MethodsGrowth mixture modeling (GMM) was used to identify trajectories of depressive symptoms over 12 months post-treatment. Logistic regression models were used to examine associations between baseline characteristics and trajectory class membership in 483 patients (TAU: 231; TAU + TDG-CBT: 251).ResultsWe identified different patterns of symptom change in the randomized groups: two trajectories in TAU (‘improvement’ (71.4%) and ‘no improvement’ (28.6%)), and four trajectories in TAU + TDG-CBT (‘recovery’ (69.8%), ‘late recovery’ (5.95%), ‘chronicity’ (4.77%), and ‘relapse’ (19.44%)). Higher baseline symptom severity and comorbidity were associated with poorer treatment outcomes in both treatment groups and worse emotional regulation strategies were linked to the ‘no improvement trajectory’ in TAU. The TAU + TDG-CBT group demonstrated greater symptom reduction compared to TAU alone.ConclusionsThere is heterogeneity in treatment outcomes. Integration of TDG-CBT with TAU significantly improves symptom reduction compared to TAU alone. Patients with higher baseline severity and comorbidities show poorer outcomes. Identification of trajectories and related factors could assist clinicians in tailoring treatment strategies to optimize outcomes, particularly for patients with a worse prognosis. PB Cambridge University Press SN 0033-2917 YR 2024 FD 2024-12 LK https://hdl.handle.net/20.500.14352/133712 UL https://hdl.handle.net/20.500.14352/133712 LA eng NO Prieto-Vila, M., González-Blanch, C., Saunders, R., Buckman, J. E. J., Muñoz-Navarro, R., Esteller Collado, G., Barrio-Martínez, S., Moriana, J. A., Ruiz-Rodríguez, P., Carpallo-González, M., & Cano-Vindel, A. (2024). Long-term depressive symptoms trajectories following CBT delivered in primary care compared to usual treatment. Psychological Medicine, 54(16), 4918-4927. https://doi.org/10.1017/S0033291724002976 NO 2025 Otros acuerdos transformativos UCM.This research was supported by the Spanish Ministry of Science (RETOS grant PID2019-107243RB-C21 and FPI grant PRE2020-092381). NO Ministerio de Ciencia e Innovación DS Docta Complutense RD 21 mar 2026