Suicide / Comorbidity / Humans / Major Depressive Disorder / Hospitalization / Female / Male / Cognitive Performance / Clinical Sciences / Aged / Middle Aged / Public health systems and services research / Cost of Illness / Frontal Lobe / Substance-Related Disorders / Cognition disorders / Case Control Studies / The American / Female / Male / Cognitive Performance / Clinical Sciences / Aged / Middle Aged / Public health systems and services research / Cost of Illness / Frontal Lobe / Substance-Related Disorders / Cognition disorders / Case Control Studies / The American