David McKinnis Consulting, LLC
In 2009, 24.2% of teens had five or more alcoholic drinks in a row within a couple of hours on at least one day.
Centers for Disease Control. "Trends in the Prevalence of Alcohol Use."
http://www.cdc.gov/HealthyYouth/yrbs/pdf/us_alcohol_trend_yrbs.pdf
Smoking
In 2005, 23% of teens had smoked a cigarette in the past 30 days.
Centers for Disease Control. "Trends in the Prevalence of Tobacco Use."
http://www.cdc.gov/HealthyYouth/yrbs/pdf/us_tobacco_trend_yrbs.pdf
Pregnancy
One in three teen girls become pregnant at least once by age 20.
The National Campaign. "One in Three: The Case for Wanted and Unwanted Pregnancy." May 2007, 10.
http://www.thenationalcampaign.org/why-it-matters/pdf/CaseStatement.pdf
Relationship Violence
Sugarman, D.B. and G.T. Hotaling. "Dating Violence: prevalence, context, and risk markers." Violence in Dating Relationships. Ed. M.A. Pirog-Good and J.E. Stets. New York: Praeger, 1989.
Overweight and Obesity
American Academy of Pediatrics. Committee on Nutrition. "Prevention of Pediatric Overweight and Obesity." Pediatrics 112.2 (2003): 424-430.