Table 1

Sample characteristics
Subtype
 Afrikaans
 Northern Sotho
 Tsonga
 Venda
 North Ndebele
 Tswana
 Bolobedu
 Total
ADHD-HI







Boys







6–9 yr
 6
 5
 1
 2
 1
 3
 5
 23
10–13 yr
 3
 2
 0
 4
 4
 9
 6
 30
Girls







6–9 yr
 1
 2
 3
 4
 1
 1
 1
 13
10–13 yr
 2
 1
 2
 0
 1
 0
 2
 8
ADHD-PI







Boys







6–9 yr
 4
 1
 5
 10
 6
 3
 4
 33
10–13 yr
 4
 3
 3
 5
 3
 2
 8
 28
Girls







6–9 yr
 1
 4
 3
 1
 1
 1
 2
 13
10–13 yr
 1
 2
 5
 3
 2
 4
 3
 20
ADHD-C







Boys







6–9 yr
 3
 7
 8
 5
 4
 4
 6
 37
10–13 yr
 4
 6
 7
 6
 4
 6
 5
 38
Girls







6–9 yr
 3
 2
 1
 2
 2
 1
 2
 13
10–13 yr
 0
 4
 1
 0
 0
 2
 1
 8
Non-ADHD







Boys







6–9 yr
 13
 13
 14
 17
 11
 10
 15
 93
10–13 yr
 13
 11
 10
 15
 11
 17
 19
 96
Girls







6–9 yr
 5
 8
 7
 7
 4
 3
 4
 38
10–13 yr
 3
 7
 8
 3
 3
 6
 7
 37
Total
 68
 78
 78
 84
 58
 72
 90
 528

Meyer and Sagvolden Behavioral and Brain Functions 2006 2:33   doi:10.1186/1744-9081-2-33