Table of Contents Author Guidelines Submit a Manuscript
Sleep Disorders
Volume 2018, Article ID 1636574, 6 pages
https://doi.org/10.1155/2018/1636574
Research Article

Research into an Association between Anhedonia and Decreased REM Latency in Moderately to Severely Depressed Patients

Department of Psychiatry and Sleep Laboratory, Erasmus Hospital, ULB, Brussels, Belgium

Correspondence should be addressed to Laurie Nizet; eb.ca.blu@tezin.eirual

Received 19 March 2018; Accepted 16 May 2018; Published 2 July 2018

Academic Editor: Liborio Parrino

Copyright © 2018 Laurie Nizet et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Anhedonia stands as a core symptom and potential trait marker of major depressive disorder (MDD). The importance of rapid eye movement sleep latency (REML) as a biological marker of depression has previously and repeatedly been studied. The aim of this paper is to analyse the relationship between anhedonia and REML in moderately to severely depressed patients. The shortened Beck Depression Inventory (BDI-13) was chosen to assess depressive symptoms and, among them, more particularly, anhedonic symptoms. Two-way ANCOVA was used for statistical analyses. A significant association between anhedonic symptoms and REML was found when the number of sleep cycles (NCy) and the severity of depression were added as covariates. Our findings suggest that REML may be a useful variable to differentiate some diagnostic subtypes of depression related to anhedonia.