Congnitive impairment in depression and its implication on quality of life

major depression was the 4th most important determinant of the burden of human disease in 1990 and is expected to rank and in the world by 2020.-andrew et al,2002-.many studies have shown an associated between depressive symptoms and cognitive decline.-jorm,2002-.the main aim of this study is 1-to study the effect of depression on cognitive impairment and depression.3-effect of depression and cognitive impairment on quality of life.