Depression Clinical Trial
Official title:
Memory Functioning and Antidepressant Treatment: A Randomized Controlled Trial Comparing Escitalopram and Bupropion XL
Major Depressive Disorder (MDD) is a serious illness associated with considerable morbidity, risk of suicide and adverse social consequences (Montgomery et al., 1994a). Cognitive impairment is one of the three major symptom areas of MDD. Specifically, memory impairment and concerns are one of the most commonly reported complaints in MDD. While antidepressant (AD) treatments vary a great deal in their propensity to cause cognitive impairment, there remains a paucity of empirical evidence on the effects of AD treatment on neuropsychological indices of memory functioning in non-geriatric depressed individuals. Hence, comparative effects of various AD drugs on memory functioning remain unclear.The aim of this study is to evaluate multiple aspects of memory functioning (short-term, working memory, verbal, non-verbal, spatial and prospective memory) of MDD patients before and after 8 weeks of antidepressant treatment with bupropion XL or escitalopram.
Purpose of the Present Study:
The purpose of the present study is to comprehensively evaluate memory functioning of MDD
patients before and after 8 weeks of antidepressant treatment with bupropion-XL or
escitalopram. A neuropsychological test battery will incorporate multiple aspects of memory
functioning including: short-term & working memory; verbal, non-verbal, spatial and
prospective memory.
Major Research Questions:
1. Which subtypes of memory at baseline are more impaired?
2. What is the relationship between memory impairment and symptom severity and previous
number of episodes or duration of illness?
3. Is successful AD treatment associated with improvement in memory functioning?
4. Is there a main effect by AD type?
5. On which subtypes of memory do patients improve, worsen, or remain neutral in the 2
different AD groups? (Main effect of memory type?)
6. What is the relationship between change in memory function and symptomatic outcome?
Study Design:
This is a randomized, double-blind, double-dummy trial comparing the memory functioning of
depressed subjects before and after 8 weeks of treatment with bupropion-XL as compared to
escitalopram.
All consenting, eligible subjects will receive either active bupropion-XL or active
escitalopram following the baseline visit. Doses will be fixed with an opportunity for dose
reduction if subjects are unable to tolerate fixed dose.
;
Allocation: Randomized, Endpoint Classification: Efficacy Study, Intervention Model: Parallel Assignment, Masking: Double-Blind, Primary Purpose: Treatment
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