Comorbidity between obesity and attention deficit/hyperactivity disorder: population study with 13-15-year-olds.

Objective: This study analyzes whether obese children have a higher risk of attention deficit/hyperactivity "characteristics" (AD/HD) than do children with other nutritional states.

Method: This study included 35,403 participants from 486 community schools. They completed the AD/HD scale of the Strengths and Difficulties Questionnaire (SDQ) and were weighed and measured.