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Notes & Sources

Source: Healthy Youth Survey.

Every 2 years, Washington public school students in 6th, 8th, 10th, and 12th grades answer questions about safety and violence, physical activity and diet, alcohol, tobacco and other drug use, and related risk and protective factors. To learn more about the survey, please go to

Students were asked “How tall are you without your shoes on?” and “How much do you weigh without your shoes on?” These self-reported data on height and weight were used to calculate each student’s Body Mass Index.

Body Mass Index (BMI) is a ratio of weight to height used in defining obesity and overweight. Youth are considered obese if their BMI is at or above the 95th percentile for children of the same age and gender. Youth are considered overweight if the BMI at or above the 85th percentile and below the 95th percentile for students of the same age and gender.

Numerator: Students who reported a height and weight that classified them as overweight.

Denominator: All students who answered the questions.