RT info:eu-repo/semantics/article T1 Non-adherence to antidepressant treatment and related factors in a region of Spain: A population-based registry study A1 Pedrosa Naudín, M. Aránzazu A1 Gutiérrez Abejón, Eduardo A1 Herrera Gómez, Francisco Magno A1 Fernández Lázaro, Diego A1 Álvarez González, Francisco Javier K1 Antidepressants K1 Antidepresivos K1 Drug utilization K1 Medicamentos - Uso K1 Psychiatry K1 Pharmacy K1 Psychopharmacology K1 Depression K1 Depresión mental K1 Anxiety K1 Ansiedad K1 Psychopathology K1 Psychotropic drugs K1 Drogas psicotrópicas K1 3209 Farmacología K1 3211 Psiquiatría K1 3209.09 Psicofarmacología AB Antidepressants are a commonly prescribed psychotropic medication, and their use has increased in recent years. Medication non-adherence in patients with mental disorders is associated with worse health outcomes. A population-based registry study to assess antidepressant non-adherence during 2021 has been carried out. An indirect method based on the medication possession ratio (MPR) has been utilized. Patients with a MPR under 80% were classified as non-adherent. A multivariate logistic regression to identify non-adherence predictors has been used, considering sociodemographic (age, sex, institutionalization and urbanicity) and health related variables (diagnostics, antidepressant class, multiple prescribers, and polypharmacy). In 2021, 10.6% of the Castile and Leon population used antidepressants. These patients were institutionalized (7.29%), living in urban areas (63.44%), polymedicated with multiple prescribers (57.07%), and using serotonin selective reuptake inhibitors (SSRIs) (54.77%), other antidepressants (46.82%) or tricyclic antidepressants (TCAs) (13.76%). Antidepressants were prescribed mainly for depression (36.73%) and anxiety (29.24%). Non-adherence to antidepressants was more frequent in men (20.56%) than in woman (19.59%) and decreased with increasing age (32% up to 17 years old vs. 13.76% over 80 years old). TCAs were associated with the highest prevalence of non-adherence (23.99%), followed by SSRIs (20.19%) and other antidepressants (18.5%). Predictors of non-adherence in patients on antidepressants were: living in urban areas, using TCAs, and pain occurrence. Non-adherence to antidepressants decreases with aging. Being female, institutionalization, being polymedicated and having depression/anxiety alongside another psychiatric diagnosis are protective factors against non-adherence. The MPR is a robust indicator for the clinician to identify non-adherent patients for monitoring, and adopt any necessary corrective actions. PB MDPI SN 1999-4923 YR 2022 FD 2022 LK https://uvadoc.uva.es/handle/10324/60298 UL https://uvadoc.uva.es/handle/10324/60298 LA eng NO Pharmaceutics, 2022, Vol. 14, Nº. 12, 2696 NO Producción Científica DS UVaDOC RD 25-nov-2024