The new data came from the 2008 to 2010 National Survey on Drug Use and Health, which rely on questionnaires and face-to-face surveys. Between the ages of 12 and 15, the percentage of girls who reported experiencing a major depressive episode in the past year jumped from 5 to 15 percent respectively. A depressive episode was defined as a period of two weeks or longer during which teens experienced a depressed mood or a loss of interest or pleasure, along with other changes in day-to-day functioning, like a loss of sleep or appetite or changes in concentration. The figures also suggest that an average of 1.4 million girls between ages 12 and 17 experienced one of those episodes within the last year — a rate that is nearly three times that of their male peers.
Reasoned Audacity
Depression In Girls Triples Between Ages 12 And 15