More teenagers and young adults die from suicide than cancer, heart disease, AIDS, birth defects, stroke, pneumonia, influenza, and chronic lung disease combined. There are an average of over 3,470 attempts by students in grades 9–12.[5] Some of these suicides are because of, or in part due to the stress they are under during school. A similarly common disorder is Attention deficit hyperactivity disorder (ADHD), which is categorized as a childhood disorder but oftentimes carries through into adolescence and adulthood.