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13-05-2017 | Uitgave 9/2017

Quality of Life Research 9/2017

Depression severity and concentration difficulties are independently associated with HRQOL in patients with unipolar depressive disorders

Tijdschrift:
Quality of Life Research > Uitgave 9/2017
Auteurs:
A. Fattori, L. Neri, A. Bellomo, M. Vaggi, C. Mencacci, the ILDE Study Group
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Electronic supplementary material

The online version of this article (doi:10.​1007/​s11136-017-1595-4) contains supplementary material, which is available to authorized users.
Centers participating in the ILDE Study Group are listed in Appendix.

Abstract

Purpose

Cognitive impairment is a core feature of major depressive disorder (MDD), and dysfunctions in this area strongly contribute to MDD-associated disability. Whether cognitive impairment has an independent clinical course and a unique impact on HRQOL is still debated. We sought to characterize the relationship between depression severity and HRQOL, evaluating the burden of concentration difficulties on HRQOL.

Methods

Six hundred ninety-two patients with unipolar depressive disorders recruited in 19 Italian centers answered a self-administered survey (SF-12 questionnaire, socio-demographic information). A psychiatrist completed a standardized data collection form encompassing a depression severity scale (MADRS) and clinical information.

Results

There was a strong graded association between the severity of depressive symptoms and both the physical (ω 2 = 0.13; p < 0.01) and mental (ω 2 = 0.34; p < 0.01) SF-12 domains. Additionally, we observed a strong association between concentration difficulties and all HRQOL outcomes independent of other symptoms of depression and robust to adjustment for possible confounders.

Conclusions

Our data corroborate previous findings suggesting that cognitive impairment is a feature of unipolar depressive disorders partially independent of the severity of other symptoms, and may represent a specific target of therapy with a strong impact on patients’ functioning and quality of life.

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