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Health-related quality of life in patients with depression treated with duloxetine or a selective serotonin reuptake inhibitor in a naturalistic outpatient setting

Authors Hong J, Novick D, Montgomery W, Moneta MV, Dueñas H, Peng X, Haro JM

Received 4 June 2015

Accepted for publication 9 September 2015

Published 16 October 2015 Volume 2015:9 Pages 1481—1490

DOI https://doi.org/10.2147/PPA.S89870

Checked for plagiarism Yes

Review by Single-blind

Peer reviewers approved by Dr Doris Leung

Peer reviewer comments 2

Editor who approved publication: Dr Johnny Chen

Jihyung Hong,1 Diego Novick,1 William Montgomery,2 Maria Victoria Moneta,3 Héctor Dueñas,4 Xiaomei Peng,5 Josep Maria Haro3

1Eli Lilly and Company, Windlesham, Surrey, UK; 2Eli Lilly Australia Pty Ltd, Sydney, NSW, Australia; 3Parc Sanitari Sant Joan de Déu, Fundació Sant Joan de Déu, CIBERSAM, Universitat de Barcelona, Barcelona, Spain; 4Eli Lilly de Mexico, Mexico City, Mexico; 5Eli Lilly and Company, Indianapolis, IN, USA

Purpose: To assess the levels of quality of life (QoL) in major depressive disorder (MDD) patients treated with either duloxetine or a selective serotonin reuptake inhibitor (SSRI) as monotherapy for up to 6 months in a naturalistic clinical setting mostly in the Middle East, East Asia, and Mexico.
Patients and methods: Data for this post hoc analysis were taken from a 6-month prospective observational study involving 1,549 MDD patients without sexual dysfunction. QoL was measured using the EQ-5D instrument. Depression severity was measured using the Clinical Global Impression of Severity and the 16-item Quick Inventory of Depressive Symptomatology Self-Report (QIDS-SR16), while pain severity was measured using the pain items of the Somatic Symptom Inventory. Regression analyses were performed to compare the levels of QoL between duloxetine-treated (n=556) and SSRI-treated (n=776) patients, adjusting for baseline patient characteristics.
Results: These MDD patients, on average, had moderately impaired QoL at baseline, and the level of QoL impairment was similar between the duloxetine and SSRI groups (EQ-5D score of 0.46 [SD =0.32] in the former and 0.47 [SD =0.33] in the latter, P=0.066). Both descriptive and regression analyses confirmed QoL improvements in both groups during follow-up, but duloxetine-treated patients achieved higher QoL. At 24 weeks, the estimated mean EQ-5D score was 0.90 in the duloxetine cohort, which was statistically significantly higher than that of 0.83 in the SSRI cohort (P<0.001). Notably, pain severity at baseline was also statistically significantly associated with poorer QoL during follow-up (P<0.001). In addition, this association was observed in the subgroup of SSRI-treated patients (P<0.001), but not in that of duloxetine-treated patients (P=0.479).
Conclusion: Depressed patients treated with duloxetine achieved higher QoL, compared to those treated with SSRIs, possibly in part due to its moderating effect on the link between pain and poorer QoL.

Keywords: depression, antidepressant, duloxetine, SSRI, quality of life

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