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Table 47. Percentage of 14- to 25-year-olds who experienced a Major Depressive Episode (MDE) in their lifetime and in the past year, by sex, year, and age group: 2006 through 2009
 
Year and age group Total   Male   Female
Lifetime Past year   Lifetime Past year   Lifetime Past year
2006                
Total 14.8 9.0   9.6 5.7   20.1 12.3
14–17 14.8 9.2   8.2 4.5   21.7 14.0
18–20 13.0 8.5   8.8 5.9   17.6 11.4
21–25 15.9 9.1   11.5 6.7   20.2 11.5
                 
2007                
Total 14.9 9.4   9.9 5.9   20.0 12.9
14–17 15.3 10.1   9.0 5.6   21.9 14.8
18–20 12.9 8.0   9.0 5.5   17.1 10.6
21–25 16.0 9.7   11.5 6.6   20.4 12.8
                 
2008                
Total 14.4 9.1   9.0 5.3   19.9 13.0
14–17 15.0 9.8   7.9 4.8   22.3 15.0
18–20 13.1 8.9   8.2 5.8   18.3 12.2
21–25 14.7 8.7   10.4 5.4   18.9 11.9
                 
2009                
Total 14.4 8.5   9.9 5.7   19.1 11.4
14–17 15.3 9.6   10.2 6.1   20.8 13.3
18–20 13.3 7.8   8.6 4.9   18.4 11.0
21–25 14.4 8.1   10.5 5.9   18.1 10.2
NOTE: Major Depressive Episode (MDE) is defined as a period of at least 2 weeks when a person experiences a depressed mood or loss of interest or pleasure in daily activities, plus at least four additional symptoms of depression (such as problems with sleep, eating, energy, concentration, and feelings of self-worth) as described in the fourth edition of the Diagnostic and Statistical Manual of Mental Disorders (DSM-IV) (American Psychiatric Association 1994).
SOURCE: U.S. Department of Health and Human Services, Substance Abuse and Mental Health Services Administration, National Survey on Drug Use and Health (NSDUH), 2006–09. Retrieved May 2, 2009, from http://oas.samhsa.gov/nhsda.htm.

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