NLP Analysis of Weekly Narratives for Dynamic Clinical Assessment in SUD

Inclusion Criteria: 1. Clinical diagnosis of severe substance use disorder (polydrug use, including cocaine, methamphetamines, alcohol, and/or cannabis), confirmed by the center's admission assessment. 2. Male sex (all participants in the center's residential program are male). 3. Age 18 years or older. 4. Current resident of the participating residential rehabilitation center in Mexico. 5. Completed at least four weeks of residential treatment at the time of study enrollment. 6. Able to write coherent weekly narratives in Spanish (no severe cognitive impairment or active psychosis). 7. Willing to provide written informed consent. Exclusion Criteria: 1. Presence of acute psychotic symptoms that interfere with the ability to write or understand the study procedures. 2. Severe cognitive impairment (e.g., due to traumatic brain injury, intellectual disability) that prevents meaningful narrative production. 3. Inability to comply with weekly narrative writing (e.g., illiteracy, severe visual impairment). 4. Planned discharge from the residential program within less than 4 weeks from enrollment. 5. Enrollment in another interventional clinical trial that could confound the interpretation of outcomes.