The diagnostic criteria that apply to adults have been relaxed and this reflects growing evidence that some people are still impaired by ADHD symptoms even if the symptoms have reduced in number. The criteria for children remain at six out of nine from a list of inattentiveness symptoms and/or six out of nine from a list of symptoms of hyperactivity and impulsiveness. Adults over 18, however, need only to display five out of the same lists. Furthermore, for adults being diagnosed for the first time, the criteria for onset in childhood have also been relaxed. Previously there had to have been “some impairment” before the age of seven. Now it is only necessary to show that symptoms were present (not impairment) before the age of twelve.