Treatment-resistant depression in primary care across Canada
- PMID: 25007419
- PMCID: PMC4086317
- DOI: 10.1177/070674371405900702
Treatment-resistant depression in primary care across Canada
Abstract
Objective: Treatment-resistant depression (TRD) represents a considerable global health concern. The goal of the InSight study was to investigate the prevalence of TRD and to evaluate its clinical characterization and management, compared with nonresistant depression, in primary care centres.
Methods: Physicians completed a case report on a consecutive series of patients with major depressive disorder (n = 1212), which captured patient demographics and comorbidity, as well as current and past medication.
Results: Using failure to respond to at least 2 antidepressants (ADs) from different classes as the definition of TRD, the overall prevalence was 21.7%. There were no differences in prevalence between men and women or among ethnicities. Patients with TRD had longer episode duration, were more likely to receive polypharmacy (for example, psychotropic, lipid-lowering, and antiinflammatory agents), and reported more AD related side effects. Higher rates of disability and comorbidity (axes I to III) were associated with treatment resistance. Obesity and being overweight were also associated with treatment resistance. While the selection and sequencing of pharmacotherapy by family physicians in this sample was in line with recommendations from evidence-based treatment guidelines, the wait time to make a change in treatment was 6 to 8 weeks in both groups, which exceeds guideline recommendations.
Conclusions: These real-world data demonstrate the high prevalence of TRD in primary care settings, and underscore the substantial burden of illness associated with TRD.
Objectif :: La dépression réfractaire au traitement (DRT) représente un problème de santé considérable sur le plan mondial. Le but de l’étude InSight était de rechercher la prévalence de la DRT et d’en évaluer la caractérisation et la gestion cliniques, comparativement à la dépression non réfractaire, dans les centres de soins primaires.
Méthodes :: Les médecins ont procédé à une étude de cas sur une série consécutive de patients souffrant de trouble dépressif majeur (n = 1212), qui comprenait les données démographiques et les comorbidités des patients, ainsi que leurs médicaments présents et passés.
Résultats :: En utilisant la non réponse à au moins 2 antidépresseurs (AD) de différentes classes comme définition de la DRT, la prévalence globale était de 21,7 %. Il n’y avait pas de différence de prévalence entre hommes et femmes ou entre groupes ethniques. Les patients souffrant de DRT avaient des épisodes de plus longue durée, étaient plus susceptibles de recevoir une polypharmacie (par exemple, des agents psychotropes, des hypolipidémiants, et antiinflammatoires), et déclaraient plus d’effets secondaires liés aux AD. Des taux élevés d’invalidité et de comorbidité (axes I à III) étaient associés à la résistance au traitement. L’obésité et l’embonpoint étaient aussi associés à la résistance au traitement. Même si la sélection et la séquence de la pharmacothérapie par les médecins de famille dans cet échantillon étaient conformes aux recommandations des lignes directrices basées sur les données probantes du traitement, le temps d’attente pour effectuer un changement de traitement était de 6 à 8 semaines dans les 2 groupes, ce qui excède les recommandations des lignes directrices.
Conclusions :: Ces données en milieu réel démontrent la prévalence élevée de la DRT dans les soins de première ligne, et soulignent le fardeau substantiel de la maladie associé à la DRT.
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Comment in
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Support, patience, and expectancy: therapeutic options alongside intensified treatments for depression?Can J Psychiatry. 2014 Jul;59(7):347-8. doi: 10.1177/070674371405900701. Can J Psychiatry. 2014. PMID: 25007418 Free PMC article. No abstract available.
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