All-cause mortality in patients with treatment-resistant depression: a cohort study in the US population

Author:

Li Gang,Fife Daniel,Wang Grace,Sheehan John J.,Bodén Robert,Brandt Lena,Brenner Philip,Reutfors Johan,DiBernardo Allitia

Abstract

Abstract Background Treatment-resistant depression (TRD) may represent a substantial proportion of major depressive disorder (MDD); however, the risk of mortality in TRD is still incompletely assessed. Methods Data were obtained from Optum Clinformatics™ Extended, a US claims database. Date of the first antidepressant (AD) dispensing was designated as the index date for study entry and 6 months prior to that was considered the baseline period. Patients with MDD aged ≥ 18 years, index date between January 1, 2008 and September 30, 2015, no AD claims during baseline, and continuous enrollment in the database during baseline were included. Patients who started a third AD regimen after two regimens of appropriate duration were included in the TRD cohort. All-cause mortality was compared between patients with TRD and non-TRD MDD using a proportional hazards model and Kaplan–Meier estimate with TRD status being treated as a time-varying covariate. The model was adjusted for study year, age, gender, depression diagnosis, substance use disorder, psychiatric comorbidities, and Charlson comorbidity index. Results Out of 355,942 patients with MDD, 34,176 (9.6%) met the criterion for TRD. TRD was associated with a significantly higher mortality compared with non-TRD MDD (adjusted HR: 1.29; 95% CI 1.22–1.38; p < 0.0001). Survival time was significantly shorter in the TRD cohort compared with the non-TRD MDD cohort (p < 0.0001). Conclusions Patients with TRD had a higher all-cause mortality compared with non-TRD MDD patients.

Funder

Janssen Research and Development

Swedish Research Council

Publisher

Springer Science and Business Media LLC

Subject

Psychiatry and Mental health

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