Separately, ADHD and asthma each have been associated with mood disorders. Are patients with both ADHD and asthma at an even greater risk?

Though the past decade has seen increases in prescription drugs used among adults, the use of doctor-prescribed medications among children has actually declined - with some exceptions.

Kids with special needs are struggling in the classroom, far more than their peers. Kids with special needs feel more isolated, are the victims of bullying at far greater rates, and are less motivated to do well academically.

Attention deficit - hyperactivity disorder (ADHD) has a lot of genetic cousins, ranging from autism to diarrhea. Researchers have recently added childhood asthma to the list.