Depression in the United States—an Update

Depression in the United States—an Update

How common is depression? This is one of the fundamental questions Deborah Hasin and colleagues addressed in a recent epidemiological study about Major Depressive Disorder (MDD) in the United States.

The study analyzed data collected in 2012 and 2013 to provide an update on similar research from over a decade ago. Over 36,000 individuals age 18 and older were interviewed by trained personnel as part of the National Epidemiologic Survey on Alcohol and Related Conditions III. The analysis utilized the most current diagnostic criteria found in DSM-5. Participants were evaluated for depressive episodes and other psychiatric conditions that occurred during the previous 12 months as well as over their lifetimes.

Over 10 percent of the individuals in this study experienced function-impairing depression during the previous 12 months, and about 20 percent had experienced depression during their lifetimes. The prevalence was almost twice as high in women compared to men. During the previous year, reported depression was less common in those 65 and older than in those younger than 65. In fact, the prevalence of depression was 5.4 percent in the older group, considerably lower than the average.

About 13 percent of depressive episodes occurred shortly after the death of a loved one and lasted less than two months. In previous years, these episodes would have been diagnosed as bereavement, but the new diagnostic manual has eliminated bereavement as a separate diagnosis.