P-147 - A comparative cost-analysis of initiating pregabalin or SSRI/SNRI therapy in benzodiazepine resistant patients with generalized anxiety disorder

Objectives To compare healthcare costs from the perspective of the Spanish National Healthcare System (NHS) of initiating treatment with pregabalin or SSRI/SNRI as add-on therapies in patients with generalized anxiety disorder (GAD), who are resistant to benzodiazepine-based therapy (BR). Methods BR patients with GAD (DSM-IV criteria) included in a prospective, multicentre, observational cohort study carried out in outpatients attending mental health centers, were selected in this post-hoc analysis. BR was defined as insufficient response with persistence of symptoms of anxiety (HAM-Anxiety scale≥ 16) after a 6-month course of BR (standard dose). Healthcare resource utilization (HRU) associated with GAD included drug treatments, medical visits, hospitalization and non-pharmacologic therapies which were collected twice (baseline and end-of-trial visits) during a 6-month period. Related costs were estimated in each visit and adjusted changes between visits compared using ANCOVA models. Results A total of 128 patients received pregabalin and 126 SSRI/SNRI. Compared with SSRI/SNRI, pregabalin was associated with significantly lower adjusted mean increment use of anxiolytics; 0.55 vs. 1.12, p  Conclusion Initiating treatment with pregabalin was associated with significant reduction in HRU and total cost for GAD compared to SSRI/SNRI in BR patients in the Spanish NHS setting.