text: The prevalence of<unk><unk><unk>  disorder (ADHD) is estimated to be 5,000 per 100,000 (5%) children and 2,500 per 100,000 (2.5%) adults. Boys are more commonly affected by ADHD than girls. The male to female ratio is 2 to 1.
option_0: Attention-deficit hyperactivity disorder epidemiology and demographics
option_1: Bipolar disorder epidemiology and demographics
option_2: Asperger syndrome epidemiology and demographics
option_3: Obsessive-compulsive disorder epidemiology and demographics
option_4: Mental retardation epidemiology and demographics
option_5: Personality disorder epidemiology and demographics
option_6: Post traumatic stress disorder epidemiology and demographics
option_7: Schizophrenia epidemiology and demographics