Prevalence of Sadness or Hopelessness Among Students in the US, 2011
"During the 12 months before the survey, 28.5% of students nationwide had felt so sad or hopeless almost every day for 2 or more weeks in a row that they stopped doing some usual activities (Table 21). Overall, the prevalence of having felt sad or hopeless almost every day for 2 or more weeks in a row was higher among female (35.9%) than male (21.5%) students; higher among white female (34.3%), black female (31.4%), and Hispanic female (41.4%) than white male (20.7%), black male (18.0%), and Hispanic male (24.4%) students, respectively;"
"Youth Risk Behavior Surveillance — United States, 2011," Morbidity and Mortality Weekly Report (Atlanta, GA: Centers for Disease Control, June 8, 2012) Vol. 61, No. 4, p. 10.