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Functioning in patients with major depression treated with duloxetine or a selective serotonin reuptake inhibitor in East Asia

Authors Novick D, Montgomery W, Haro JM, Moneta MV, Zhu G, Yue L, Hong J, Duenas H, Brugnoli R

Received 17 November 2015

Accepted for publication 22 December 2015

Published 23 February 2016 Volume 2016:12 Pages 383—392

DOI https://doi.org/10.2147/NDT.S100675

Checked for plagiarism Yes

Review by Single-blind

Peer reviewers approved by Dr Xiang Mou

Peer reviewer comments 3

Editor who approved publication: Dr Roger Pinder

Diego Novick,1 William Montgomery,2 Josep Maria Haro,3 Maria Victoria Moneta,3 Gang Zhu,4 Li Yue,5 Jihyung Hong,6 Héctor Dueñas,7 Roberto Brugnoli8

1Eli Lilly and Company, Windlesham, Surrey, UK; 2Eli Lilly Australia Pty Ltd, West Ryde, NSW, Australia; 3Parc Sanitari Sant Joan de Déu, Fundació Sant Joan de Déu, CIBERSAM, Universitat de Barcelona, Barcelona, Spain; 4Department of Psychiatry, The First Affiliated Hospital of China Medical University, Shenyang, 5Lilly Suzhou Pharmaceutical Company, Ltd, Shanghai, People’s Republic of China; 6Department of Healthcare Management, Gachon University, Seongnam, South Korea; 7Eli Lilly de Mexico, Mexico City, Mexico; 8School of Medicine, Sapienza University of Rome, Rome, Italy

Purpose: To assess and compare the levels of functioning in patients with major depressive disorder treated with either duloxetine with a daily dose of ≤60 mg or a selective serotonin reuptake inhibitor (SSRI) as monotherapy for up to 6 months in a naturalistic setting in East Asia. In addition, this study examined the impact of painful physical symptoms (PPS) on the effects of these treatments.
Patients and methods: Data for this post hoc analysis were taken from a 6-month prospective observational study involving 1,549 patients with major depressive disorder without sexual dysfunction. The present analysis focused on a subgroup of patients from East Asia (n=587). Functioning was measured using the Sheehan Disability Scale (SDS). Depression severity was assessed using the 16-item Quick Inventory of Depressive Symptomatology-Self Report. PPS were rated using the modified Somatic Symptom Inventory. A mixed model with repeated measures was fitted to compare the levels of functioning between duloxetine-treated (n=227) and SSRI-treated (n=225) patients, adjusting for baseline patient characteristics.
Results: The mean SDS total score was similar between the two treatment cohorts (15.46 [standard deviation =6.11] in the duloxetine cohort and 16.36 [standard deviation =6.53] in the SSRI cohort, P=0.077) at baseline. Both descriptive and regression analyses confirmed improvement in functioning in both groups during follow-up, but duloxetine-treated patients achieved better functioning. At 24 weeks, the estimated mean SDS total score was 4.48 (standard error =0.80) in the duloxetine cohort, which was statistically significantly lower (ie, better functioning) than that of 6.76 (standard error =0.77) in the SSRI cohort (P<0.001). This treatment difference was more apparent in the subgroup of patients with PPS at baseline. Similar patterns were also observed for SDS subscores (work, social life, and family life).
Conclusion: Depressed patients treated with duloxetine achieved better functioning compared to those treated with SSRIs. This treatment difference was mostly driven by patients with PPS at baseline.

Keywords: depression, antidepressant, duloxetine, SSRI, functioning

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